I am reading data from a modbus ip device and have data points configured to access coil status registers. When these points are enabled, I receive alarms like the following:
'Measurements A': Baseline A1 P1 WL1: Illegal function
What does this mean?
Here's the configuration of a typical point:
"loggingType":"ON_CHANGE",
"intervalLoggingPeriodType":"MINUTES",
"intervalLoggingType":"INSTANT",
"purgeType":"YEARS",
"pointLocator":{
"range":"COIL_STATUS",
"modbusDataType":"BINARY",
"additive":0.0,
"bit":0,
"multiplier":1.0,
"offset":110,
"settableOverride":true,
"slaveId":1,
"slaveMonitor":false
},
"eventDetectors":[
],
"engineeringUnits":"",
"chartRenderer":{
"type":"IMAGE",
"timePeriodType":"MINUTES",
"numberOfPeriods":60
},
"dataSourceXid":"DS_DATA_A",
"defaultCacheSize":1,
"discardExtremeValues":false,
"discardHighLimit":1.0E-4,
"discardLowLimit":-1.0E-4,
"enabled":false,
"intervalLoggingPeriod":15,
"name":"Baseline A1 P1 WL1",
"purgePeriod":1,
"textRenderer":{
"type":"BINARY",
"oneColour":null,
"oneLabel":"On",
"zeroColour":"#ff0000",
"zeroLabel":"Off"