ADSI 9240 Manual de usuario

Manual

For

Recorder Model 9240

Revision

11-1-5

Allen Datagraph Systems Inc

www.allendatagraph.com

Table of Contents

1Introduction........................................................................................................................4

1.1 Description .........................................................................................................................4

1.2 Software Development Kit ................................................................................................4

1.3 Operating Modes................................................................................................................4

1.4 Manual Conventions ..........................................................................................................5

2Electrical Connections .......................................................................................................5

2.1 Connector Locations ..........................................................................................................5

2.2 Power Supply Connections................................................................................................6

2.3 Analog Signal Connections................................................................................................7

2.4 Digital Signal Connections ................................................................................................8

2.5 Preamplifier .......................................................................................................................9

3Stand-Alone Operation ....................................................................................................10

3.1 Configuration Settings .....................................................................................................10

3.2 The M Port .......................................................................................................................10

3.3 Other Signals....................................................................................................................11

4Computer-Driven Operation ............................................................................................12

4.1 C/D Port Signals ..............................................................................................................12

4.2 Command / Data Byte Transfer Cycle.............................................................................13

5Software Commands........................................................................................................14

5.1 Overview..........................................................................................................................14

5.2 Waveform Mode Commands...........................................................................................14

5.2.1 Analog Waveform Mode: ................................................................................................14

5.2.2 Digital Waveform Mode:.................................................................................................15

5.2.3 Chart Speed Commands...................................................................................................15

5.2.4 Channel Format and Enable Commands..........................................................................16

5.2.5 Grid Commands...............................................................................................................16

5.2.6 Print Chart Speed / Logo Commands ...............................................................................17

5.2.7 Annotation Commands ....................................................................................................17

5.2.8 Event Mark Commands ...................................................................................................19

5.2.9 Dither Commands ............................................................................................................20

5.3 Text Mode Commands.....................................................................................................20

5.4 Graphics Mode Commands..............................................................................................21

5.5 Miscellaneous Commands ...............................................................................................22

5.5.1 Reset Command...............................................................................................................22

5.5.2 Print Head Control Commands........................................................................................22

5.5.3 Step Motor Once Command ............................................................................................23

5.5.4 Self Test Command .........................................................................................................23

6Paper Loading ..................................................................................................................24

7Care of the Recorder ........................................................................................................24

8Specifications...................................................................................................................25

8.1 General.............................................................................................................................25

8.2 Waveform Mode ..............................................................................................................25

8.3 Text Mode........................................................................................................................26

8.4 Graphics Mode.................................................................................................................26

8.5 Digital Control Interface ..................................................................................................26

8.6 Environmental..................................................................................................................26

8.7 Reliability.........................................................................................................................26

Appendix A Using The 9240 with A PC...................................................................................27

A.1 Interface Cabling..............................................................................................................27

A.2 PC Parallel Printer Port Registers ....................................................................................28

A.3 Transferring Commands and Data to the 9240 ................................................................29

A.4 Programming Examples...................................................................................................30

Appendix B Software Command Summary ..............................................................................40

Appendix C Allen Datagraph Systems, Inc Warranty...............................................................41

Appendix D Shipping Claims I mp o r t a n t ...............................................................................42

Appendix E Firmware Part Numbers........................................................................................43

List of Examples

Example A-1 Analog Waveform Mode Programming .................................................................30

Example A-2 Digital Waveform Mode Programming..................................................................33

Example A-3 Vertical Text Mode Programming..........................................................................35

Example A-4 Horizontal Text Mode Programming .....................................................................36

Example A-5 Graphics Mode Programming ................................................................................38

List of Illustrations

Figure 2-1 9240 Controller Board Signal Connections Table ........................................................5

Figure 2-2 Typical Power Supply Control Circuit Using ~PSEN Control Signal ..........................7

Figure 2-3 Preamplifier Schematic ...............................................................................................10

Figure 4-1 C/D Port Signal Timing...............................................................................................13

Figure 5-1 Grid Pattern Examples ................................................................................................17

Figure 5-2 Annotation Segment Positions, 1 x 40 mm Channel Format ......................................18

Figure 5-3 Annotation Segment Position, 2 x 20 mm Channel Format........................................18

Figure 5-4 Event Mark Examples .................................................................................................20

Figure 5-5 Text Mode Character Orientation ...............................................................................21

Figure 5-6 Bit-Mapped Graphics Data Orientation ......................................................................22

Figure A-1 Interface Cable - 9240 to IBM PC Compatible Parallel Printer Port .........................28

Figure A-2 Command / Data Byte Transfer Flowchart ................................................................30

Figure A-3 Example A-1 Output - Analog Waveform Mode Programming ................................33

Figure A-4 Example A-2 Output - Digital Waveform Mode Programming.................................35

Figure A-5 Example A-3 Output - Vertical Text Mode Programming.........................................36

Figure A-6 Example A-4 Output - Horizontal Text Mode Programming.....................................38

Figure A-7 Example A-5 Output - Graphics Mode Programming................................................39

List of Tables

Table 2.1 Power Supply Connections.............................................................................................6

Table 2.2 Analog Signal Connections.............................................................................................8

Table 2.3: Digital Signal Connections ............................................................................................9

Table 3.3.1 M-Port Speed Selection P2 ........................................................................................11

Table 4.1 C/D Port Byte Transfers................................................................................................13

Table 5.1 Character Set.................................................................................................................19

Table A.1 IBM PC Parallel Port Bit Assignments For Programming 9240 .................................29

Table B.1 9240 Software Command Summary ............................................................................40

1 Introduction

1.1 Description

The Model 9240 is a two-channel 40 mm thermal strip-chart recorder module. Featuring microprocessor-based

electronics and thermal dot array print head, the 9240 can either be operated in stand-alone mode or it can be interfaced

to a host computer for additional flexibility. The versatility of the 9240 makes it the ideal chart recorder choice for a

variety of applications and systems.

The 9240 hardware consists of three basic modules:

•The paper transport consists of the mechanical housing, drive and print rollers, and a stepper motor drive train

for moving the chart paper at any of several calibrated speeds. A paper-out sensor is also provided.

•The 48 mm thermal print head is mounted on the top of the transport mechanism and contains an array of 384

thermal print elements.

•The microprocessor -based control electronics are located on a printed circuit board mounted on the

rear of the unit. The controller processes analog and/or digital signal information and controls the

operation of the paper transport and print head to produce waveform plots, text, or graphic images on the

chart.

1.2 Software Development Kit

The 9240 software development kit can be downloaded from the Allen Datagraph web site at

www.allendatagraph.com. Then click on Tech Support and choose the 9240 Recorder topic. The

development kit includes a driver and demonstration code that allows user level programs to write to the

parallel port of a PC from the Windows XP or Window 2000 operating system. The kit is written in

Delphi 6. If you want to make changes to the Delphi source code for the kit or use the Delphi driver

installation class, Delphi 6 is required. The kit uses a modified freeware driver developed by

http://www.beyondlogic.org/ using the PortTalk module. If you prefer to write in C you can modify the

driver installation software supplied by beyond logic to install the Allen Datagraph Port9240 driver by

changing the driver name in their code. The driver is compiled by the Windows XP driver development

kit. All source code is included in the kit.

1.3 Operating Modes

The 9240 features four distinct operating modes: analog waveform, digital waveform, text, and graphics. At

power-up, the recorder enters the analog waveform mode. In stand-alone applications, where the 9240 is not connected

to a host computer, only the analog waveform mode is available. For access to the other three operating

modes, the 9240 must be interfaced to a host computer.

ANALOG WAVEFORM MODE:

The 9240 reads the two analog signals that are input through the P6 connector, digitizes using the on-board A/D

converters, and plots the corresponding waveforms. The chart can be formatted as two separate 20 mm channels, with

one analog signal plotted in each channel, or both signals can be plotted together in a single 40 mm channel. Channel 0

includes an optional pre amplifier to allow voltage ranges other then 0 to 5 volts.

DIGITAL WAVEFORM MODE:

Digital data from the host computer is latched into the recorder's C/D Port (command/data interface port), and the

corresponding waveforms are then plotted.

TEXT MODE:

The 9240 receives ASCII characters from the host computer through the C/D Port and prints the

corresponding text in either horizontal or vertical format.

GRAPHICS MODE:

The recorder accepts "bit mapped" graphics data through the C/D Port and uses the bit patterns to address and control

the individual dot elements of the thermal print head. This mode can produce any desired graphics image or pattern on

the chart.

1.4 Manual Conventions

The ~ (tilde) character before an electronic signal name indicates that the signal is asserted when at the

LOW level. E.g. less then 0.8 volts.

The signal names which have a bar or over score are "true" when LOW.

A signal name with a bar over the top and the same named signal with a ~ prefix are the same signal.

~CMD/DATA Using a ~ in front of part of a name indicates the voltage level to select that name. In the case of ~CMD indicates a

low voltage is necessary to select CMD and high voltage is necessary to select DATA.

2 Electrical Connections

2.1 Connector Locations

All electrical connections to the 9240 are made through connectors P6, P5, and P2 on the controller circuit

board. These connectors carry analog signals, power supply connections, and digital interface signals respectively.

Figure 2.1 shows the location and orientation of these circuit board connectors on the Rev D CPU board. Connector

numbers and location differ slightly different in Rev B CPU boards.

Figure 2-1 9240 Controller Board Signal Connections Table

2.2 Power Supply Connections

Two separate DC power supply voltages are required for correct operation of the 9240:

A regulated 5-volt supply (Vlogic) is required for powering the controller logic and analog circuits.

A separate Vmotor/Vhead supply powers both the chart drive stepper motor and the thermal array print head. Several

different Vmotor/Vhead voltages are supported by different versions of the 9240; See Appendix E for the

Vmotor/Vhead voltage requirements (listed as "PRINTHEAD VOLTAGE") of your particular unit.

The power supplies are connected to connector P5 on the controller board as shown in Table 2.1.

Table 2.1 Power Supply Connections

P5 Connector Pinout Power Requirements

PIN # DESCRIPTION SUPPLY VOLTAGE RANGE WATTS

1 Vlogic Vlogic 5.0VDC ±10% 2 W

2 Vlogic GND

3 Vmotor/Vhead GND

4 Vmotor/Vhead GND

5 Vmotor

6 (key)

7 Vhead

8 Vhe ad

Vmotor = Vhead

(The same supply is usually

used for both head and

motor)

See Appendix E for nominal

Vmotor/Vhead voltage

12V nominal:

11-13.8 VDC

1 5 V nominal:

14 - 16 VDC

18V nominal:

17 -19 VDC

See Rev D note below

11-30V

Vmotor : 5W

Vhead : 64W

All black

printing. If only

192 pixels are

ever black then

32W

Note: The Vhead power supply should never be applied to the 9240 unless the Vlogic supply has been

switched ON and the microprocessor has had time to complete its reset cycle- This may be accomplished in

either of two ways. With either method, Vmotor is usually switched along with Vhead to save power.

An external timing circuit may be employed to ensure that the V. supply is not enabled until at least two seconds

after the Vlogic supply has stabilized to 5 volts. The external circuit must also insure that when the Vlogic

supply is switched off the Vhead supply is also immediately disabled

The ~PSEN signal line, located on the P2 digital signal connector, may be used as a control signal to activate an

external switch or relay to enable the Vhead supply. The PSEN signal line, described in futher detail in

Section 2.3, goes LOW under control of the 9240 microprocessor only when the Vhead supply is actually

required for chart motion or printing. ~PSEN stays HIGH at all other times when the Vmotor supply is powered

on. This is the preferred method of controlling Vhead. See Figure 2.2 for a typical power supply control circuit

using the ~PSEN signal line.

FAILURE TO FOLLOW THESE REQURIMENTS COULD PERMANENTLY DAMAGE THE PRINT HEAD

AND MAY VOID THE WARRANTY.

Rev D Board Note: On the revision D board a new power supply circuit has been added. This power supply

board converts the Vhead input voltage to 7.5 volts for the new head. As a result of the new power supply

board the voltage range requirements of the Vhead has been significantly loosened. If the 9240 you have, has

the new power supply board, then the Vhead/Vmotor voltage can be between 11V and 30V with the same

number of watts as specified in the table above. In addition the Vhead voltage is now controlled by the

~PSEN line which turns off the head voltage when the printer is not printing. As a result of this change there

is no longer a requirement to turn on the Vhead voltage after the Vlogic supply is turned on. They can be

powered on at the same time.

Note also that the Vlogic, and Vhead/Vmotor grounds must be tied together at the power supply.

Figure 2-2 Typical Power Supply Control Circuit Using ~PSEN Control Signal

2.3 Analog Signal Connections

In analog waveform mode, the 9240 scans the voltages of the two analog signals inputs and plots

the corresponding waveforms on the chart. The signals for channel 0 are fed into P6-1 (signal) and P6-2

(Gnd), while the signals for channel l are fed into P6-5 (signal) and P6-6 (Gnd). Each signal must be a positive voltage

with a range of 0 to 5 volts maximum, with 5 volts corresponding to full-scale amplitude of the output plot. Table 2.2

shows the connection of these signals to the analog signal input connector.

Note: Analog signal input lines are NOT over-voltage protected. Ensure that these lines do not experience

DC voltages greater than +5 VDC or less than 0 V with respect to GROUND.

FAILURE TO FOLLOW THESE REQUIREMENTS COULD PERMENANTELY DAMAGE THE

RECORDER AND MAY VOID THE WARRANTY.

Table 2.2 Analog Signal Connections

Connector P6

PIN # DESCRIPTION

1 Channel 0 input +

2 Channel 0 input -

3 Analog Ground

4 (Reserved)

5 Channel 1 input +

6 Channel 1 input -

7 Analog Ground

8 (Reserved)

2.4 Digital Signal Connections

Connector P2 carries all digital inputs and output signals between the 9240 and the external system. Table

2.3 lists the signals on the P2 connector along with a description of their use. All digital signals are TTL

compatible. All input lines have on-board resistors and are pulled HI if left unconnected.

Note: Digital signal lines are NOT over-voltage protected Ensure that these lines do not experience DC

voltages greater than +5.5 V or less than -0.7 V with respect to GROUND.

FAILURE TO FOLLOW THESE REQUIREMENTS COULD PERMANENTLY DAMAGE THE

RECORDER AND MAY VOID THE WARRANTY.

Four digital input signals (M0-M3) form the "M Port," used exclusively for controlling the 9240 in stand-

alone mode. The operation of the M Port is described in Section 3, Stand-Alone Operation.

Input signals D0-D7 form an 8-bit parallel bus. Along with the STR0BE, CMD / DATA, W/~A,

CHANNEL, and BUSY signals, this bus forms the "C/D Port" to provide a high-speed interface for

controlling the 9240 from a host computer. Section 4, "Interfacing the 9240 to a Computer," describes the

functions of these signals.

The remaining signals on connector are general-purpose control and status signals and may be used in

either stand-alone or computer-driven mode. These signals are described below:

~STEP (P2-10)

This input is provided as an external clock for the chart drive stepper motor. The motor speed selection must

be set to SINGLE STEP, either through the M Port (stand-alone mode) or by software command (computer-

driven mode). Once the SINGLE STEP speed has been selected, each negative-edge pulse of the STEP line will

advance the chart paper 1/18 mm. The maximum motor speed obtainable from the S T E P input is 25 mm per second,

corresponding to a maximum frequency of 450 Hz.

The ~STEP line can also be used to initiate the 9240's power-on self-test printout. To start a self-test,

connect the ~STEP line to logic ground when the power is off then apply power. When the self-test

printout begins, disconnect the ~STEP line from ground. See the Self Test Command description in Section

5.5.4 for a description of the self-test printout.

~PSEN (P2-19):

This output line is provided as a means for the 9240 to drive external circuitry for turning the Vhead/Vmotor

power supply on and off PSEN goes LOW just before the 9240 starts to print and then HIGH after

printing. It is recommended to use this line for efficient power consumption and head protection. See Section 2.1

for details.

~RESET (P2-21):

Bringing this input line LOW initiates a hardware reset of the 9240 and returns it to power-

up conditions. RESET shouldbeheldLOWaminimumof50milliseconds to insure that a reset cycle occurs.

~ALARM (P2-22):

This output signal goes LOW to indicate the presence of any of the following alarm conditions: paper

out, print head over-temperature, or self-test failure. Any communication with the 9240 when

ALARM is asserted will be lost. The recorder will halt all activity except monitoring of the alarm sensors

while the alarm condition persists.

Table 2.3: Digital Signal Connections

Connector. P2

PIN # SIGNAL NAME Direction FUNCTION. M Port (stand-alone)

mode

FUNCTION, C/D Port

(computer-driven) mode

1 ~STROBE Input No connection Latches D0-D7 &

~CMD/DATA into C/D Port

2-9 DO - D7 Input No connection 8-bit command / data bus (C/D

Port)

10 ~STEP Input External dock input for chart drive motor (also initiates power-on

self-test)

11 BUSY Output no connection Indicates C/D port busy status

12 CHANNEL Input Selects 1 x 40 mm or 2 x 20 mm

char format

Specifies channel for digital

waveform data

13 W/~A Input Triggers event mark Specifies data type: digital

waveform / other

14 ~CMD//DATA Input No connection Specifies content of D0-07:

command/ data

15 -18 MO - M3 Input Selects chart speed (M Port) Must be HIGH for C/D port

operation

19 ~PSEN Output Control signal for external switching of Vhead power supply

20 (Reserved) no connection

21 ~RESET Input Hardware reset of 9240

22 ~ALARM Output Indicates error condition: Paper out, print head over-temperature,

or self-test failure.

2 3 - 2 5 V l o g i c Gnd Ground reference for digital signal

26 (Reserved) No connection

2.5 Preamplifier

The schematic in figure 2.3 shows the configurable preamplifier only available on the Rev D 9240 CPU

board. The 9240 is normally shipped with the preamplifier disabled. E.g. JP2 and JP3 installed. To

configure the preamplifier you can use the preamp.xls worksheet that is included in the installation

directory of the software development kit. After installing Excel and the SDK from the start menu select

All Programs -> Allen Datagraph -< 9240 SDK -> Configure Gain of Preamplifier. Using the spreadsheet

you can set the minimum and maximum voltage levels to configure the preamp as either an attenuator or

an amplifier. To set the gain and offset of the amplifier follow the instructions on the preamp.xls. Install

the resistor in R7 (+ 4K) as calculated by the preamp.xls to set the gain range. With the power off with an

ohmmeter set to ohms Ωconnect to TP2 and JP1 and set the gain exactly using the gain pot. After setting

the gain, power up the 9240 with no analog input signal. Set DVM to DC volts (A V with a flat bar over

the top). Connect black to TP3 Gnd and red to TP1 and adjust the zero voltage to the value calculated by

preamp.xls. Move the jumper in JP2 to JP1. If very high gains are used you might have to separate the

grounds to get a clean signal by removing JP3.

Figure 2-3 Preamplifier Schematic

The analog and logic ground should then be connected in the customers power supply. A gain of 0.3 to 3

should be easy to configure. Higher gains may require an external preamplifier with isolated voltage

sources. If desired R7 can be chosen by the customer and Allen Datagraph will install this resistor at the

factory. Note: Ground bouncing caused by the print head turning on amplified by a large gain value

in the preamplifier will cause spikes on the waveform if a large (> 40) number of dots on the paper

are turned on simultaneously. If you need a large gain you will need to do one of the following:

Provide your own preamplifier or do not use a printed grid.

Use of the preamp will allow any range of analog signals in the range of –10V to 10V with a gain of 0.3 to

3 to be converted to the 0 to 5V range of the A to D converters on the board.

Note: the amplifier above inverts the analog signal input so the top of the range is mapped to 0V and the

bottom of the range is mapped to 5V. Software commands from the parallel port can be used to invert the

channel data back to normal. This feature can be defaulted on power up to either normal or invert status

E4H 22910 Invert Channel 0

E5H 23010 Normal Channel 0

3 Stand-Alone Operation

3.1 Configuration Settings

The 9240 is designed for quick setup of analog waveform mode recording without requiring connection to anexternal

computer. The chart format information is permanently set in the program ROM of the 9240's

microprocessor. The configuration sheet in Appendix E lists the power-up settings used in stand-alone mode for

your particular version of 9240 software. For an illustration of the grid patterns, see Figure 5.1.

The power-up settings are also printed out as part of the power-on self-test. For an explanation of running this self

test, refer to the description of the ~STEP signal in Section 2.3. Consult the factory if the self-test printout does not match

the configuration sheet or if your application requires custom settings.

3.2 The M Port

In stand-alone operating mode, the M Port, consisting of the four input signal lines M0-M3 (P2 pins 15-18),

is used to set the chart speed. Table 3.1 shows the M Port speed selections for the standard 9240 software

configuration. The configuration sheet lists the chart speeds for your unit, in order from speed 0 through 7.

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