need urgent help

mohamed_amin

Member
Join Date
Oct 2010
Location
Cairo
Posts
3
Dears,
I'm working with Premium Hot/Standby PLC to communicate with Sub-systems via Serial Modbus. I use READ_VAL & WRITE_VAL function blocks to exchange the data with those sub-systems. the problem here that I can only exchange %m & %mw data types which equivalent to 00XX & 40XX registers, do any body know how can I exchange Registers 10XX & 30XX? I've worked in a similar project before but with M340 Processor and I was able to read/write registers 10XX & 30XX by using %I & %IW data types but it doesn't work now with premium Hot/Standby processor. Any idea?
 
Last edited:
Dears,
After digging I found that function SEND_REQ could be used, it's little bit difficult...does any body worked with this function before?
 

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