urupic
Newbie level 4
Hi, I'm doing some hobby practices with HMI/SCADA systems in LabView. I have an old Siemens S7-200 CPU 214 and it's work fine with PC/PPI cable and NI OPC Server. The PLC haven't any programming. The LabView "VI" diagram control I/O through OPC driver. The time response is quite slow (maybe 3 or 5 seconds) so I want try ethernet connection to speed up. This old CPU don't support the ethernet module CP234-1.
I have a Lantronix UDS1100 Device Server in RS485 mode connected directly to PLC's RS485 pins, the OPC driver configured as "Ethernet encapsulation" and pointing to lantronix's IP. I know that PC/PPI cable is only a RS232<->RS485 converter, then a Ethernet<->RS485 converter with RS232 commands "encapsulated" in TCP/IP packets should be work.
Well, this don't work... Somebody can tell me why? :?
The parameters (baud rate, data bits, etc.) are OK.
Somebody do something similar with this or another PLC?
Thanks for your help.
Regards.
I have a Lantronix UDS1100 Device Server in RS485 mode connected directly to PLC's RS485 pins, the OPC driver configured as "Ethernet encapsulation" and pointing to lantronix's IP. I know that PC/PPI cable is only a RS232<->RS485 converter, then a Ethernet<->RS485 converter with RS232 commands "encapsulated" in TCP/IP packets should be work.
Well, this don't work... Somebody can tell me why? :?
The parameters (baud rate, data bits, etc.) are OK.
Somebody do something similar with this or another PLC?
Thanks for your help.
Regards.