Siemens Welding System ST PCS 7 Manual De Usuario

ET 200M distributed I/O

Siemens ST PCS 7 · November 2007

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The modules with HART (High-

way Addressable Remote 

Transducer) which can be 

used in ET 200M remote I/O 

stations (with IM 153-2 High 

Feature interface module) per-

mit connection of HART de-

vices to SIMATIC PCS 7 automation systems.
All transmitters or HART actuators certified for digital communi-

cation using the HART protocol can be connected via these 

modules.
Conventional transmitters with 4 to 20 mA technology without 

HART protocol can also be connected.
All modules with HART come with diagnostics capability (chan-

nel and module diagnostics). The diagnostics and monitoring 

functions are directly available in SIMATIC PCS 7. They require 

no additional engineering. Plain text messages output on the op-

erator station provide information on faults or changes in the 

HART parameter settings. 
Homogenous integration in the SIMATIC Process Device Man-

ager (PDM) and the PCS 7 Asset Management permit intuitive 

online diagnostics and parameterization of all connected field 

devices from a central position.

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HART is a serial transmission procedure with which additional 

parameter data such as measuring ranges, attenuation etc. can 

be sent to transmitters and actuators over a 4 to 20-mA current 

loop. The HART jobs for each channel can be remotely initiated 

over the PROFIBUS DP. This usually takes place from the central 

engineering system of the SIMATIC PCS 7 process control sys-

tem per SIMATIC PDM.
The modules with HART have the following features:
• Connections compatible with the conventional analog mod-

ules of the ET 200M

• Additional communications possibility over the current loop
• 8 analog channels per module (2 analog channels with Ex 

modules)

• Each channel is a primary master of the HART protocol
• Selectable input range per channel (AI): 

- 0 to 20 mA (without HART function)

-

±

 20 mA (without HART function, not with Ex module)

- 4 to 20 mA (with/without HART function)

• Selectable output range per channel (AO): 

- 0 to 20 mA (with/without HART function; in the case of 

Ex module, only without HART function)

- 4 to 20 mA (with/without HART function)

Additional functions of the HART analog modules 

6ES7 331-7TF01-0AB0 and 6ES7 332-8TF01-0AB0:
• Supplementary HART variables (up to 4 per channel, up to 

8 per module) allow the transmission of additional values 

from/to the HART devices

• Modules can be operated in redundant mode (module and 

channel redundancy) 

• For the analog input modules (AI), it is possible to parameter-

ize e.g. conversion time, input range, limits, alarms, smooth-

ing of measured values

• For the analog output modules (AO), it is possible to parame-

terize e.g. output range, response on stoppage of AS (CPU), 

diagnostics

• Remote parameterization (per PROFIBUS DP) of the HART 

transmitters and actuators with SIMATIC PDM

• It is still possible to parameterize the HART devices using an 

operator terminal (handheld).

© Siemens AG 2007