CP 343-1 ERPC
Manual, 03/2010, C79000-G8976-C239-02
37
ERPC functions
6
Content of this section
This section deals with the ERPC functions of the CP and the necessary actions to be taken
with the Siemens tools.
The functions of the ERPC software and the ILS Workbench are not described in this
document. Read the relevant documentation of our cooperation partners
ILS Technology LLC.
6.1 Overview
6.1.1 The ERPC functions
Data exchange with ERP subscribers
The ERPC functions of the CP 343 1 ERPC allow the data exchange via LAN between the
SIMATIC S7 automation station and ERP subscribers at the enterprise management level.
An ERP subscriber can, for example, be an ERP system or an MES.
WARNING
Changing process data during write access
If you write data from an ERP subscriber to the CPU, access to process data is possible. If
you change the values of process variables with write this access, the values can be
changed directly in the process.
Changing process data can trigger unexpected reactions in the process that can lead to
serious injury to persons or damage to equipment. With this in mind, a degree of caution is
necessary.
Restrict the access rights for the following systems and their configuration computer:
– The ERP subscribers that communicate with the CP 343 1 ERPC (configured by the
ILS Workbench)
In the ILS Workbench configuration, make sure that you take into account the rights
for read and write access to the ERPC symbols from the STEP 7 configuration!
– The automatization station in which the CP 343-1 ERPC is located (configuration
with STEP 7)
Install a physical emergency stop circuit for the machine or process.
With the ERPC functions of the CP, this allows the interfacing of the process level
(automation) with a higher-level ERP system.
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