i have Modbus device .. i histories the device status tag [System]Gateway/Devices/plc1/Status.. what's the meaning of quality value -2147483132
It looks like it's Bad_Stale. I don't know why you'd see that on a gateway status tag. Is the device being disabled at times?
Hi Kevin , there's up-normal behavior in Modbus device communication . thus why i need to histories the PLC device communication status to check behavior .
at -2147483132 it showing good quality it tag [System]Gateway/Devices/plc1/Status.Quality