plcs communication

[new_man 0]

hiiiii i have nine plc are communicated by communication cards ever plc take node address from 1 to 9 ,there is shareing memory , every plc can read and write at this sharing memory how can establish this memory and can make change

[azeosv 0]

Hi! What is the communication protocol that are u using??? Controller LinK? What PLCs are u using? Regards.

[new_man 0]

hiiiii controller link clk21-v1 plc type : cs1h-h cx net is used

[EasyButton 0]

Hi, I think you should start by reading the manual for controller link and understand how to set up Routing tables and Datalinks. However, here is an overveiw of Datalink. In this example CIO words sent from Node 1 (1000 - 1009) are received at Nodes 2 and 3 (1010 - 1019). Address locations for the receiving area are assigned in order starting after the send location. It is important to leave room for future word use because if you need to add words your receive area will change. Example addition of two words: Send CIO 1000 - 1011, Recv CIO 1012 - 1023 ______________________PLC1, Node1 ___________________Area1________Area2 Send(to all Nodes) CIO 1000(+10) DM 29900(+2) Recv(From Node2) CIO 1010(+10) DM 29902(+2) Recv(From Node3) CIO 1020(+10) DM 29904(+2) _______________________PLC2, Node2 ___________________Area1________Area2 Send(to all Nodes) CIO 1000(+10) DM 29900(+2) Recv(From Node1) CIO 1010(+10) DM 29902(+2) Recv(From Node3) CIO 1020(+10) DM 29904(+2) _______________________PLC3, Node3 ___________________Area1________Area2 Send(to all Nodes) CIO 1000(+10) DM 29900(+2) Recv(From Node1) CIO 1010(+10) DM 29902(+2) Recv(From Node2) CIO 1020(+10) DM 29904(+2) After Datalink is set, then each PLC can be programmed to compare the receive data with the send data. If not equal the move in new data. Hope this helps! Edited 24 Jun 2009 by EasyButton