Re: Connection to Siemens S7 PLC

[Rod Nussbaumer <bomr@triumf.ca>]

At TRIUMF, we are using our own driver to talk to 400-series Siemens 
PLCs. It uses asyn, and was modeled after Mark Rivers' modbus PLC 
driver. The underlying communications protocol is the Siemens 
FETCH/WRITE protocol over TCP/IP.

Rod Nussbaumer
ISAC Controls, TRIUMF
Vancouver, Canada


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?
>
> Thanks,
> Konrad