![]() ![]() These consist of 10-20 tags each and are set up so that data that changes frequently (< 1 time per minute on average) and infrequently are set up in different groups.Īdditionally, there are remote HMIs set up as Modbus TCP/IP slaves that receive mostly Read-Only data, but have a few tags that act as triggers for separate Tag-Change-Only triggered transaction groups (making the HMI a separate Master by proxy). There are transaction groups set up for transferring data back and forth between the RS-232 PLC and each of the RS-485 devices on a Tag-Change-Only basis. RS-232 PLC is polled for 240 tags, ~80% are read-write There are four RS485 devices connected to the TCP/IP - Serial Converter on port 2, 1 RS-232 device is connected to port 1.ĭevice #1 is polled for 54 Tags (32 are Read-only)ĭevice #2 is polled for 68 Tags (32 are Read-only)ĭevice #3 is polled for 32 tags (24 are Read-only)ĭevice #4 is polled for 3 tags (all are Read-only) ![]()
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