Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Tue, 21 Feb 2012 15:47:22 +0100

On 21.02.2012 13:13, Konrad Gajewski wrote:
> Hello everybody,
>
> I'm new to EPICS and I am planning  to control Siemens Simatic S7-200
> PLC. I have looked in EPIC documentation and found at least two ways
> to connect the PLC:
>
> 1. via MODBUS (Asyn) driver over the serial connection (using Siemens
> MODBUS RTU library)
> 2. using S7plc driver via TCP/IP and a CP 243-1 Ethernet module.
>
> The programming of the PLC is done using Step-7 Micro/WIN V4.0.
> Unfortunately I can't open the example STEP 7 PLC project  (for S7plc
> driver) in Step-7 Micro/WIN.
>
> Do you have any experience with such a configuration or maybe with
> S7-1200? Are there any better options?

Using an OPC server (Siemens or third party vendor) and OPC Device
Support is a third alternative. [1]
Introduces an additional protocol layer (and IOCs running Windows), but
lets you integrate many different PLCs from different vendors in a
streamlined, uniform way.

At HZB, we were evaluating S7plc, a CAN field bus interface and OPC
Device Support, and decided to make the OPC option our future standard
for PLC integration.

~Ralph

[1] http://www-csr.bessy.de/control/SoftDist/OPCsupport/

>
>
> Thanks,
>   Konrad
>

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System