[?]: Modbus S7-200 <-> S7-1200

[Homeroid_BL]

Hi all!
S7-1200 RS232 port is male.
S7-200 RS485 port is female.

So, is it possible to interconnect those two ports via PPI/RS232 cable, and establish Modbus communication between S7-1200 and S7-200?

Anyone did it?


Thanks in advance.

[sania]

232 <> 485
how you can connect it??

try TCP http://support.automation.siemens.com/W ... n/40622389

[Homeroid_BL]

sania,

PPI/RS232 cable converts RS232 (on the one cable end) to RS485 (on the other cable end).

See pages 468 to 469 in S7-200 System manual:
https://support.automation.siemens.com/ ... d0=4000024

[Homeroid_BL]

kHm, I decided not to be lazy.
Since I have S7-200 S7-1200 and PPI/RS232 cable in my garage, tomorrow I will try to establish communication, then I will inform you all if i make it.

[sania]

i think it's not possible
you need to send adress,speed ppi,hsa to ppi-adapter

[Homeroid_BL]

Oh s**t!
My S7-224 is a firmware version 1.22 so it does not support Modbus library commands... Grrrrrr


I foud a old Tip41B written for CPU216, step-by-step, I will ty to modify it, but it will take some time...