sfindley
Member
I have two SLC 500 5/05E processors on a subnet with a Delta motion controller. I am using OPC and Topserver for I/O comms and Wonderware for HMI interaction. When I am online with one of the PLCs using an Ethernet driver, the ladder icon barely moves and updates are excruciatingly slow. The HMI also takes a long time to update. A packet sniffer reveals that the other PLC is communicating with the TopServer twice as much as the one that is slow and the "fast" PLC seems to update pretty well.
I've seen posts about settings in RSLinx and none of them seem applicable...not using a PIC.
Curious if anybody else has seen really slow update times and what they did to alleviate them. Our program is rather large with a few BTW/BTRs in it. Can't find anything that is a smoking gun to slow things down. Scan time is nearly identical on both PLCs also.
I've seen posts about settings in RSLinx and none of them seem applicable...not using a PIC.
Curious if anybody else has seen really slow update times and what they did to alleviate them. Our program is rather large with a few BTW/BTRs in it. Can't find anything that is a smoking gun to slow things down. Scan time is nearly identical on both PLCs also.