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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: S7plc driver - PV block receiving problems |
| From: | Dirk Zimoch <[email protected]> |
| To: | <[email protected]> |
| Date: | Thu, 9 Feb 2017 13:37:11 +0100 |
Have a look with wireshark (or ethereal or tcpdump) what the PLC is really sending.
Dirk On 28.01.2017 12:12, Gianluca Borgese wrote:
Dear All, I'm using the s7plc driver to monitor and control an RF modulator which has a PLC sending a 253byte data array and receiving a 16byte data array to/from my IOC. I did some test using the PLC server emulator (server.tcl) which was into the s7plc folder and all is nice and working right! I obtain the right process variable (PV) values I expect!!! But when I connect my IOC to the real PLC I have problems with the PVs. The PV values sometimes are correct and often wrong! Do you have any idea about the possible causes? Thanks in advance. Regards, Gianluca