Cerlic BB2 Manual de usuario
2017-09-06 MANUS09/17 VER 1.03
BB2 Profibus DP
option
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Table of contents
1. Introduction ................................................................................................ 3
2. A few words about this manual................................................................... 3
3. Fieldbus introduction..................................................................................3
Network Overview.....................................................................................................3
4. Unpacking ..................................................................................................4
Damages...................................................................................................................4
Packaging .................................................................................................................4
Content .....................................................................................................................4
5. Module Overview........................................................................................ 4
6. Mounting in the BB2 control box................................................................. 5
Wiring Connections................................................................................................... 5
7. Configuration..............................................................................................6
Baudrate ...................................................................................................................6
Termination of DP Network....................................................................................... 6
Data structure ...........................................................................................................8
8. Indications..................................................................................................9
9. Getting started.......................................................................................... 10
10. Technical specification for the Profibus module ....................................... 11
Physical Interface....................................................................................................11
Configuration & Indications.....................................................................................11
Appendix I ........................................................................................................12
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1. Introduction
The BB2 Profibus module is used to connect the BB2 central unit to a Profibus network
as a slave. The user is assumed to be familiar with Profibus, and the Profibus
configuration of the master.
2. A few words about this manual
The manual primarily contains information about the BB2 Profibus module. The
operation and measuring principles of the sensors and the central unit is described in
their respective manuals.
3. Fieldbus introduction
Profibus has an international user organisation called Profibus International, PI, and
local national organisations, PNO. Technical questions regarding the fieldbus should be
addressed to your local Profibus User Group in the first instance. Address list is
available on the Profibus Internet site; www.Profibus.com. For general help on
Profibus, contact Profibus International on e-mail;
Profibus-DP is normally used in industrial automation, to transfer fast data for motor
controllers, MMI, I/O units and other industrial equipment.
NETWORK OVERVIEW
The media for the fieldbus is a shielded copper cable consisting of a twisted pair. The
baudrate for the bus is between 9.6 kbaud to max. 12 Mbaud. The Profibus-DP network
is able to carry 126 nodes and the total amount of data for a Profibus-DP node is 244
Byte out and 244 Byte in.
PLEASE NOTE: Node No. 126 is only used for commissioning purposes and should
not be used to exchange user data. The figure below gives an overview of a Profibus-DP
network.
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4. Unpacking
The unit has been tested and approved before delivery from the supplier. Please check
that no visible damages are apparent in this shipment.
DAMAGES
If damages occurred during shipment, immediately contact the shipping company and
the Cerlic representative. The shipment should be returned only after an return
authorization number has been issued by Cerlic or representative.
PACKAGING
The original packaging is designed to protect the equipment and should be used for
storage or if the product must be returned.
CONTENT
Please check that the content corresponds to your order and packing list.
5. Module Overview
The module for Profibus-DP is a slave node that can be read and written to, from a
Profibus-DP master. The module will not initiate communication to other nodes, it will
only respond to incoming commands. The module is connected to the control box via a
34 pin connector.
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6. Mounting in the BB2 control box
The Profibus module shall be mounted in a BB2 control box. Make sure the power to
the control box is switched off before mounting the Profibus module.
Connect yourself and the control box chassis to protective ground before
opening the antistatic package of the module to avoid static discharges that
can damage the module or the box.
Be careful to get all 32 pins into their sockets. Fasten the module using the three M
2,5x5 screws that comes with the module.
Mounting the module in the control box
WIRING CONNECTIONS
Connect the Profibus network to the screw terminals according to the table below.
Pin Name Function
No
Name
Function
1
+5 V BUS
Isolated +5 V from RS 485 side*
2
GND BUS
Isolated GND from RS 485 side*
3
A-Line
Negative RxD/TxD according to RS 485 specification (green)
4
B-Line
Positive RxD/TxD according to RS 485 specification (red)
5
Shield
BUS cable shield, Connected to PE
6
RTS
Request To Send*
* notes optional signals.
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7. Configuration
BAUDRATE
The baudrate on a Profibus-DP network is set during configuration of the master and
only one baudrate is possible in a Profibus-DP installation. The Profibus-DP module has
an auto baudrate detection function and the user does not have to configure the baudrate
on the module. Baudrates supported by the Profibus-DP module are:
Supported baudrates
9.6 kbit/s
19.2 kbit/s
93.75 kbit/s
187.5 kbit/s
500 kbit/s
1.5 Mbit/s
3 Mbit/s
6 Mbit/s
12 Mbit/s
TERMINATION OF DP NETWORK
The end nodes in a Profibus-DP network has to be terminated to avoid reflections on the
bus line. The Profibus-DP module is equipped with a termination switch to accomplish
this in an easy way. If the module is used as the first or last module in a network the
termination switch has to be in ON position. Otherwise the switch has to be in OFF
position.
Termination switch ON
Bus termination enabled. If the module is the last or first
module, the bus termination has to be set on, or an
external termination connector has to be used
Termination switch OFF
Bus termination disabled
PLEASE NOTE: If an external termination connector is used the switch must be in OFF position.
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Node Address
The profibus-DP node address has to be set in the field. This can be done in two ways:
1. Two rotary switches on module can be set for 1-99
2. Setting the switches to 00 tells the module to use the address configured in the
BB2 menu. It can be set from 1-125. To set up address you go into BB2 menu
by pressing “ENTER & ↑” for 5 seconds together. Then go down to “SETUP”
and pressing “ENTER”. Scroll down to “EXP. Module” and press “ENTER”.
Screen will say NODE ADDRESS 002 *1)
Change address between 2-125 and then press ENTER to exit. Do not forget to
terminate box if this is 1st or last item in loop as shown above.
PLEASE NOTE: The node address is not changed just by adjusting the settings. The
BB2 box must be turned off for 10 seconds and then powered up for address to be
recognized.
GSD file
Each device on a Profibus-DP network is associated with a GSD file, containing all
necessary information about the device. This file is used by the network configuration
program during configuration of the network. The latest version of GSD file can either
be downloaded from the webpage www.cerlic.com or received by contacting Cerlic.
See Appendix I for a print out of the file.
*1) The reason to start with no 002 is that the main control system normally is
addressed as 001.
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DATA STRUCTURE
The data to and from the control box is structured as described in the table below. Total
length for input data is 84 bytes, and for output data 4 bytes. We use “Big Endian”.
In/Out
Type
Length
Name
Content
In
57
16 byte
Id
Four bytes ID for each sensor. First byte (U8)
is sensor type (which is also the first part of
the serial number), second byte (U8) is middle
part of serial number, the two last bytes (U16)
is the second part of the serial number.
In
51
4 byte
Status
One status byte per sensor slot.
Bit 0
Online, sensor is connected and
measures.
Bit 1
Cleaning, the sensor is flushing or
brushing.
Bit 2
Frozen, the sensor value is frozen
after cleaning.
Bit 3
Alarm, the sensor has triggered a
local alarm in the control box.
Bit 4
Currently not used.
Bit 5
Currently not used.
Bit 6
Currently not used.
Bit 7
Currently not used.
In
40,5F
64 byte
Value
Four IEEE float values per sensor slot. First
value is the sensor output value, the rest is
sensor dependant.
Out
61
4 byte
Control
One control byte per sensor slot.
Currently not used.
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8. Indications
The module is equipped with four LED's mounted at the front and one LED on the
board, used for debugging purposes. The front LED's can be mounted in two ways,
either top mounted or angle mounted. The function of the LED's are described in the
table and figure below.
No
Indication
Description
1
Not Used
2
Green
Indicates that the module is On-Line on the fieldbus.
Green - Module is On-Line and data exchange is possible.
Turned Off - Module is not On-Line
3
Red
Indicates that the module is Off-Line on the fieldbus.
Red - Module is Off-Line and no data exchange is possible.
Turned Off - Module is not Off-Line
4
Red
Fieldbus Diagnostics
Indicates certain faults on the Fieldbus side.
Flashing Red 1 Hz - Error in configuration: IN and/or OUT
length set during initialisation of the module is not equal to
the length set during configuration of the network.
Flashing Red 2 Hz - Error in User Parameter data: The
length/contents of the User Parameter data set during
initialisation of the module is not equal to the length/contents
set during configuration of the network.
Flashing Red 4 Hz - Error in initialisation of the Profibus
communication ASIC.
Turned Off - No diagnostics present
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9. Getting started
A shortcut to get the Profibus communication up and running.
Make sure the BB2 box *2) to be used is switched off.
Open the front and locate the fieldbus module connector.
Connect yourself and the control box chassis to protective ground before opening
the antistatic package of the module to avoid static discharges that can damage the
module or the box.
Mount the module into the box, be careful to fit all 34 pins into the socket.
Fasten the three M2.5x5 screws
Set the rotary switches to the desired node address, or to “0 0” if you want to
configure the address in the BB2 menu Settings / Fieldbus.
Set the bus termination switch in position “On” if this is the last unit on the bus, else
set it to “Off”.
Connect the Profibus network, A-line (negative) line to screw terminal 3, B-line
(positive) to terminal 4, and shield to terminal 5.
Switch on the power to the BB2 box and check that the green led on the module
starts flashing.
If you have not set the address switches on the module you must set the node
address in the BB2 menu Settings / Fieldbus, exit the menu and then switch the
power off at least 10 seconds before it is switched on again.
Check in the BB2 menu System / Fieldbus / that the module is found and initiated.
Configure the Master system (PC, PLC or DCS) to communicate with the BB2 at
the selected node address using the data structure in previous chapter.
When the communication starts working the red LEDs in the lower right corner of
the module will go dark, and the green LED will light up. In the BB2 menu System /
Fieldbus “Online” will shift to “Yes”.
Now the Profibus communication should be working.
*2) Make sure that the program version of the BB2 box to be used has a program
version of 2.23 or higher. Before open the front, make sure that the main power
supply is switched off.
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