We are using S5 135U with CPU 928 and TTY converter for programmer communication purpose. This TTY converter is working with PLC com port internal supply. Now the communication problem is raised. I checked this TTY converter with another PLC. It is working. So I confirmed that PLC COM port is not working. This TTY converter was newly purchased. Old one is worked with external supply. It is worked for almost 10 years.
Now I need following clarifications:
1. Can siemens repair this COM port?
2. Can I use any interface module for communication purpose?( We are using CP143 with sinec H1 for MMI communication)Ex: PG submodule etc.,
Now I need following clarifications:
1. Can siemens repair this COM port?
2. Can I use any interface module for communication purpose?( We are using CP143 with sinec H1 for MMI communication)Ex: PG submodule etc.,