Endress+Hauser Promag 50 PROFIBUS-PA Especificaciones técnicas

KA 014D/06/en/04.01

Valid as of software version:

V 1.01.XX (Amplifier)

V 1.00.XX (Communication)

promag 50

PROFIBUS-PA

Electromagnetic

Flow Measuring System

Brief Operating Instructions

Commissioning the PROFIBUS-PA interface

Promag 50 PROFIBUS-PA

2Endress+Hauser

This brief operating instruction serves for commissioning the Promag 501 interface. You

will find complete information in the Promag 50 Operating Instructions BA 055D/06/en/

04.01.



Warning:

For safety instructions regarding the installation, commissioning and operation, as well

as operational safety and returns of Promag 50 see the Promag 50 Operating Instruc-

tions BA 055D/06/en/04.01.

Promag 53 PROFIBUS-DP/-PA Table of contents

Endress+Hauser 3

Table of contents

1 Safety instructions . . . . . . . . . . . . . . 5

1.1 Designated use . . . . . . . . . . . . . . . . . . . . . . . . 5

1.2 Installation, commissioning and operation . . . 5

2 Wiring. . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 Cable specifications – PROFIBUS-PA . . . . . . . 7

2.2 Connecting the measurement device . . . . . . 10

2.2.1 Connecting the transmitter . . . . . . . . . 10

2.2.2 Terminal assignment . . . . . . . . . . . . . 12

2.2.3 Fieldbus connector . . . . . . . . . . . . . . . .13

2.3 Electrical connection check . . . . . . . . . . . . . . 15

3 Operation . . . . . . . . . . . . . . . . . . . . . 17

3.1 Operation at a glance . . . . . . . . . . . . . . . . . . 17

3.2 Operation via the local display . . . . . . . . . . . 18

3.2.1 Display and operating elements . . . . 18

3.2.2 Brief description of the function matrix .19

3.3 Group COMMUNICATION . . . . . . . . . . . . . . . 21

3.4 Group TOTALIZERS . . . . . . . . . . . . . . . . . . . . 23

3.5 Communication: PROFIBUS-PA . . . . . . . . . . 25

3.5.1 PROFIBUS-PA technology . . . . . . . . . 25

3.5.2 System architecture . . . . . . . . . . . . . . 25

3.5.3 Acyclic data exchange . . . . . . . . . . . . .27

3.6 Operation using the PROFIBUS configuration

program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

3.6.1 FieldTool™ operating program . . . . . . 28

3.6.2 Commuwin II operating program . . . . 28

3.7 Hardware settings . . . . . . . . . . . . . . . . . . . . . 36

3.7.1 Setting the write protection . . . . . . . . . 36

3.7.2 Setting the device address for PROFIBUS-

PA . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

4 Commissioning . . . . . . . . . . . . . . . . 39

4.1 Function check . . . . . . . . . . . . . . . . . . . . . . . 39

4.2 Commissioning via the local display . . . . . . . 40

4.3 Commissioning via a Class 2 Master

(Commuwin II) . . . . . . . . . . . . . . . . . . . . . . . . 41

4.3.1 Rescaling the input value . . . . . . . . . . 42

4.4 System integration . . . . . . . . . . . . . . . . . . . . . 43

4.4.1 Cyclic data exchange . . . . . . . . . . . . . .46

4.4.2 Configuration examples with the Simatic

S7 HW Config . . . . . . . . . . . . . . . . . . . .52

5 Trouble-shooting. . . . . . . . . . . . . . . 57

5.1 Software history . . . . . . . . . . . . . . . . . . . . . . . 58

6 Technical data. . . . . . . . . . . . . . . . . 59

Table of contents Promag 53 PROFIBUS-DP/-PA

4Endress+Hauser

Promag 50 PROFIBUS-PA 1 Safety instructions

Endress+Hauser 5

1 Safety instructions

1.1 Designated use

The measuring device described in this Operating Manual is to be used only for meas-

uring the flow rate of conductive fluids in closed pipes. A minimum conductivity of

20 µS/cm is required for measuring demineralised water. Most fluids can be metered,

provided they have a minimum conductivity of 5 µS/cm, for example:

•acids, caustic solutions,

•drinking water, wastewater, sewage sludge,

•milk, beer, wine, mineral water, etc.

The manufacturer accepts no liability for damages resulting from incorrect use or use

not as designated.

1.2 Installation, commissioning and operation

Note the following points:

•Installation, connection to the electricity supply, commissioning and maintenance of

the device must be carried out by trained, qualified specialists authorised to perform

such work by the facility's owner-operator. The specialist must have read and under-

stood this Operating Instruction and must follow the instructions it contains.

•The device must be operated by persons authorised and trained by the facility's

owner-operator. Strict compliance with the instructions in the Operating Instruction is

mandatory.

•Endress+Hauser will be happy to assist in clarifying the chemical resistance proper-

ties of parts wetted by special fluids, including fluids used for cleaning.

•If welding work is performed on the piping system, do not ground the welding appli-

ance through the Promag flowmeter.

•The installer must ensure that the measuring system is correctly wired in accordance

with the wiring diagrams. The transmitter must be grounded, unless the power supply

is galvanically insulated.

•Invariably, local regulations governing the opening and repair of electrical devices

apply.

1 Safety instructions Promag 50 PROFIBUS-PA

6Endress+Hauser

Promag 50 PROFIBUS-PA 2 Wiring

Endress+Hauser 7

2Wiring

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Warning:

•When connecting Ex-certified devices, see the notes and diagrams in the Ex-specific

supplement. Please do not hesitate to contact your E+H representative if you have any

questions.

•If you use remote versions, connect each sensor only to the transmitter having the

same serial number. Measuring errors can occur if the devices are not connected in

this way.

2.1 Cable specifications – PROFIBUS-PA

Cable type

Twin-core cable is required for connecting the flowmeter to the fieldbus. By analogy

with IEC 61158-2 protocol four different cable types (A, B, C, D) can be used with the

PROFIBUS protocol, only two of which (cable types A and B) are shielded.

•Cable types A or B are particularly preferable for new installations. Only these types

have cable shielding that guarantees adequate protection from electromagnetic inter-

ference and thus the most reliable data transfer. On multi-pair cables (Type B), it is

permissible to operate multiple Fieldbuses (with the same degree of protection) on

one cable. No other circuits are permissible in the same cable.

•Practical experience has shown that cable types C and D should not be used due to

the lack of shielding, since the freedom from interference generally does not meet the

requirements described in the standard.

The electrical data of the fieldbus cable has not been specified but determines impor-

tant characteristics of the design of the fieldbus, such as distances bridged, number of

participants, electromagnetic compatibility, etc.

Cable Type A Cable Type B

Cable structure twisted pair,

shielded

one or more twisted pairs, fully

shielded

Wire size 0.8 mm2(AWG 18) 0.32 mm2(AWG 22)

Loop resistance (DC) 44 Ω/km 112 Ω/km

Impedance at 31.25 kHz 100 Ω± 20% 100 Ω± 30%

Attenuation at 39 kHz 3 dB/km 5 dB/km

Capacitive asymmetry 2 nF/km 2 nF/km

Envelope delay distortion

(7.9 through 39 kHz) 1.7 µs/km *

Shield coverage 90% *

Max. cable length

(inc. spurs >1 m) 1900 m 1200 m

* not specified

2 Wiring Promag 50 PROFIBUS-PA

8Endress+Hauser

Suitable fieldbus cables from various manufacturers for the non-hazardous area are

listed below:

•Siemens: 6XV1 830-5BH10

•Belden: 3076F

•Kerpen: CeL-PE/OSCR/PVC/FRLA FB-02YS(ST)YFL

Maximum overall cable length

The maximum network expansion depends on the type of ignition protection and the

cable specifications. The overall cable length is made up of the length of the main cable

and the length of all spurs (>1 m). Note the following points:

•The maximum permissible overall cable length depends on the cable type used.

•If repeaters are used the maximum permissible cable length is doubled.

A maximum of four repeaters are permitted between station and master.

Maximum spur length

The line between distribution box and field device is described as a spur.

In the case of non ex-rated applications the max. length of a spur depends on the

number of spurs (>1 m):

Number of field devices

In systems that meet FISCO in the EEx ia type of protection, the line length is limited a

max. of 1000 m.

A maximum of 32 stations per segment in non-explosive areas or a maximum of 10 sta-

tions in an Ex-area (EEx ia IIC) are possible. The actual number of stations must be

determined during the project planning.

Bus termination

The start and end of each fieldbus segment are always to be terminated with a bus ter-

minator. With various junction boxes (not Ex-rated) the bus termination can be activated

via a switch. If this is not the case a separate bus terminator must be installed. Note the

following points in addition:

•In the case of a branched bus segment the device furthest from the segment connec-

tor represents the end of the bus.

•If the fieldbus is extended with a repeater then the extension must also be terminated

at both ends.

Shielding and grounding – PROFIBUS-PA

When planning the shielding and grounding for a field bus system, there are three

important points to consider:

•Electromagnetic compatibility (EMC)

•Explosion protection

•Safety of the personnel

To ensure the optimum electromagnetic compatibility of systems, it is important that the

system components and above all the cables, which connect the components, are

shielded and that no portion of the system is unshielded.

Ideally, the cable shields will be connected to the field devices' housings, which are

usually metal. Since these housings are generally connected to the protective ground

conductor, the shield of the bus cable will thus be grounded many times.

Type A 1900 m

Type B 1200 m

Number of spurs 1 ... 12 13... 14 15... 18 19... 24 25... 32

Max. length per spur 120 m 90 m 60 m 30 m 1 m

Promag 50 PROFIBUS-PA 2 Wiring

Endress+Hauser 9

This approach, which provides the best electromagnetic compatibility and personnel

safety, can be used without restriction in plants with good potential equalisation.

In the case of plants without potential equalisation, a mains frequency (50 Hz) equalis-

ing current can flow between two grounding points, which in unfavorable cases, e.g.

when it exceeds the permissible shield current, may destroy the cable.

To suppress the low frequency equalising currents on systems lacking potential equal-

isation, therefore we recommend that you connect the cable shield directly to the build-

ing ground (or protective ground conductor) at only one end and to use capacitive cou-

pling to connect it to all other grounding points.

Further information

General information and further notes regarding the wiring can be found in the Operat-

ing Instructions BA 198F/00/en “Field communications - PROFIBUS-DP/-PA: Guides for

project planning and commissioning”.

2 Wiring Promag 50 PROFIBUS-PA

10 Endress+Hauser

2.2 Connecting the measurement device

2.2.1 Connecting the transmitter



Warning:

•Risk of electric shock. Switch off the power supply before opening the device.

Do not install or wire the device while it is connected to the power supply. Failure to

comply with this precaution can result in irreparable damage to the electronics.

•Risk of electric shock. Connect the protective conductor to the ground terminal on the

housing before the power supply is applied (not necessary if the power supply is gal-

vanically isolated).

•Compare the specifications on the nameplate with the local voltage supply and fre-

quency. The national regulations governing the installation of electrical equipment

also apply.

Procedure → Fig. 1, Fig. 2

1. Remove the cover of the connection compartment (f) from the transmitter housing.

2. Feed the power-supply cable (a) and PROFIBUS cable (b) through the appropriate

cable entries.



Note:

The Promag 50 can also be supplied with the option of a ready-mounted fieldbus

connector. More information on this can be found on Page 13.

3. Connecting the cables:

–Wiring diagram (aluminium and stainless steel housings) → Fig. 1

–Wiring diagram (wall-mount housing) → Fig. 2



Caution:

–The PROFIBUS cable can be damaged!

If the shielding of the cable is grounded at more than one point in plants without

additional potential equalisation, mains frequency equalising currents can occur

that damage the cable or the shielding.

In such cases the shielding of the cable is to be grounded on only one side, i.e.

it must not be connected to the ground terminal of the housing. The shield that is

not connected should be insulated!

–We recommend that the PROFIBUS not be looped using conventional cable

glands. If you later replace even just one measuring device, the bus communica-

tion for the entire bus will have to be interrupted.



Note:

–The terminals for the PROFIBUS-PA connection (26/27) have an integral polarity

protection. This ensures correct signal transmission via the fieldbus even if lines

are confused.

–Conductor cross-section: max. 2.5 mm2

–Observe the plant's grounding concept.

4. Screw the cover of the connection compartment (f) firmly back onto the transmitter

housing.

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