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morkai / h5.modbus

Implementation of the MODBUS IP/ASCII/RTU master and slave over TCP/UDP/Serial for Node.js.
https://miracle.systems/p/h5.modbus
MIT License
28 stars 21 forks source link

modbus tcp connection interrups #10

Closed micha1983 closed 8 years ago

micha1983 commented 8 years ago

hi, i testet the h5.modbus module. i started a read connection to a wago 750-841 plc. nearly after 3min i get always a disconnected event triggered.

the interuption takes 200ms. the pings during this timeperiod are constantly nearly at 6ms. has somebody also have seen thhis phanomen?

morkai commented 8 years ago

Do you send any data during that time?

micha1983 commented 8 years ago

only once at startup one holding for testing. could this be the problem, that i should constantly send something?

morkai commented 8 years ago

Yes. The device you are using might be disconnecting you, because nothing is being sent and you're connected, so it might assume that the connection is broken.

micha1983 commented 8 years ago

thanks for the feedback. i will test this later. Great support!

micha1983 commented 8 years ago

ok. i've tested it and i'm writing at the moment every 10sec a value. but i still habe the problems of an disconnect event.

morkai commented 8 years ago

Show me some code and its results :)

micha1983 commented 8 years ago

ok. after my last post i disabled the powersave mode of my PC. at the moment i'm having a active connection since 20minutes. every second i'm writing one value

micha1983 commented 8 years ago

ok it was the energysaving mode of my PC. sorry.