shoelesscraig
Member
In a very large controllogix setup, we are sending and receiving ethernet messages from various other PLCs around the plant. I would say that there are about 25 to 30 PLCs involved total. All of the message instructions are set up in the Controllogix and most of the messages are sending or receiving 5-10 elements of data, so they are not very large. However, recently I have come across the need to "read" about 300 elements from a particular PLC. It would be a situation where I would only need to do it about once a day. Is it a problem trying to do this since the message length is so long or not? The PLC that I would need to read from is a SLC 5/03 that is set up on a NET ENI. Again, the message instructions are set up in the Controllogix. I assume that since all of the data will not fit into one data file in the SLC (too long) that I will have to use 2 message blocks in the CLX...one reading from the first data file in the SLC (say N7) and the second from another (say N10)?
Any thoughts on how to do this better?
Any thoughts on how to do this better?
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