Using modus to communicate with quint AC-ups

[Fulmetalal]

I'm trying to use labview to communicate with phoenix connect's universal power supply. I have used the NI Modbus library to try and connect to the Quint AC-UPS, but it times out or doesn't connect properly. I'm new to using modbus and would like some help communicating with it.

Baud Rate:  115200

Parity:          Even

Slave Add:  192

Mode:          RTU

Using LabVIEW 2011

Thanks

[Fulmetalal]

I might also mention that the error i seem to receive is the 6101 "time out error". Though i don't think the Init VI is working, because it passes through whether or not  the com port is pluged in.

[Dennis_Knutson]

The init function is certainly working since you do not get an error out of it. There is no way for the init function to know whether or not you have anything connected to a serial port or whether or not you have the correct serial cable or whether or not your settings for the pc's com port match the device. All that the init function does is setup the com port of the pc.

[Fulmetalal]

So then what do i need to fix the timeout error. I could use the help.

[Fulmetalal · Accepted solution]

I solved this by running the MB query in a while loop. Apparently the query was timing out the first couple of iterations.