Et200s modbus serial moduleLine Terminator (End of line resistance)???

Hello Hann,

for first pls look to that pdf file that Daniel kindly shared. start from f.ex. page 20 and continue think about your network with infos from pdf. I think better can be this system, then we can start probably discusion about your network. Sry, realy I don't understand now your schema, do you have idea about add some new device in future? I saw your interest about this, but how much? Where in the network? Can you pls specify what are other names under f.ex. PLC1? What they means with connectivity? I ask because there is PLC1 as one box and names are showed under. Also I'm interesting for Derivation lines, their max. distances, therefore I sugesting Daniel's pdf. What are your ideas?

Hello all

 I would ask Saravana , since his project works ask them also because in the manual of the CP 341 Modbus Master is specified the same resistance terminal 330 Ohm

 https://support.industry.siemens.com/tf/ww/en/posts/modbus-sample-project/44769/?page=0&pageSize=10

 Me too I don't know why 

Hi ,

my Plc sending only one question ( tx led green only one time) after not go out question. İ sending request but tx led are not green. i see

 "SEND_WORK_DB_SI_0".S[1].SEND_SI_WORK_STAT_SAV := 0530

i dont know this message mean. 

help me please.

Hello,

can you post Picture of your Send instruction with Error and Status value?