I'm trying to connect a Siemens HMI (MP277) with an Allen Bradley SLC5/03. I understand that the channel 0 of of the AB CPU is RS232C, and can be used for HMI connection. But I'll need an RS232C-RS422 converter for it, since the MP277 doesn't have an RS232C port.
A more direct connection can be made from ch 1, which is RS485, to the HMI serial port (which is selectable between raw RS485 and Profibus).
Has anyone tried this?
I'm connecting IF1B of the Siemens MP277 to the RJ45 on the SLC5/03. Pinout is as follows
However, the devices are not communicating. I have no experience with AB platform. Is it actually possible, what I'm trying to do?
Regards.
Rahul
A more direct connection can be made from ch 1, which is RS485, to the HMI serial port (which is selectable between raw RS485 and Profibus).
Has anyone tried this?
I'm connecting IF1B of the Siemens MP277 to the RJ45 on the SLC5/03. Pinout is as follows
Code:
RJ45 IF1B Description
1 3 B
2 8 A
4 5 Gnd
Regards.
Rahul
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