request code for configure message instruction with DH-485

[pmmdavid 0]

Hi all, now i would like to know the message instruction configuration on between slc 5/01 and slc 5/03 cpu using dh485 link. now i already collected 5/01 cpu , 5/03 cpu ,Proface gp2500 hmi , C11 cable ( 2 pcs ) and DH-485 link coupler . i would like to test before my project ( haven't started yet ). so anybody help me and suggest me please . and then one more thing is can i send physically output bit condition from one Cpc to another Cpu using Message instruction based on Dh-485 link. I have no experience at all on this comunication. i read manual and that only i knowfor this product lists if i use dh-485 network. i really very very interested and crazy on plc programming. please help me to all senior experience ........

[slcman 9]

I can give you few hint: Read data in other plc instead write. write execution is longer than read. Use a unique node adress for each plc DH485 is slow, don't use MSG instruction for safety device or as remote IO. Use DH485 only for non time critc data. Don't send MSG at each scan (queue will be so long, network will be overloaded) use cascade method like in attach file If on plc do more than other in the network, you can raise the token hold factor in Channel configuration window (see picture), highter number means more time. You can use S9 and S10 (processor status, active node) for enable comm only if node is active. Try to communicate with inactive node slow down network with a timed-out on each try. (see example *.rss) This post is a good start, if any question just ask it. MSG_sample.RSS

[pmmdavid 0]

Thanks a lot for your Hint , really ...... and then also very much appreciated for your attachment file .....