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+--- Thread: Modbus TCP datapoints limitation (/showthread.php?tid=4287)
Modbus TCP datapoints limitation - Ceros2112 - 07.10.2022
Hello,
what are the limits of Modbus TCP in lm5lp2?
For example, I have one building with at least 1000 modbus tcp coils, is one lm5 capable of handle that?
Thank you for your help, I'm sorry but I can't find any answerÂ
RE: Modbus TCP datapoints limitation - admin - 07.10.2022
Depends on how often you want to read this data. If coils are in a continuous range it is possible to read all at once instead of one by one.
RE: Modbus TCP datapoints limitation - Ceros2112 - 07.10.2022
They're pretty much 90% lights (there is a working PLC installed that actuate the lights) controlled with presence/light detectors, basically lm5 will be used as a SCADA (supervision, schedulers, ecc...) and as a gateway from KNX to the PLC.
I think we don't need extreme speed in reading, but we do certainly need speed when we write data to the PLC, can it be a problem?
RE: Modbus TCP datapoints limitation - admin - 07.10.2022
If PLC can handle multiple connections then it should be fine.
RE: Modbus TCP datapoints limitation - Ceros2112 - 07.10.2022
2 at best, I suppose that you're suggesting to handle reading and writing as two separate modbus requests, right?