179
Overflow X 0 0
Zero
divisionOR
Overflow
1 0 1
Zero
divisionOR
Overflow
0 1 1
Zero
divisionOR
Overflow
1 1 1
Zero
divisionOR
Overflow
0 0 0
IftheReferencedAnalogMathFBisnull,thentheoutputisalways0.
SettingtheParparameter
TheparametersMathBN,AutoRst,andErrcanbesetinprogrammingmodeorparameter
assignmentmode.Viewinprogrammingmode(example):
Usethe and keystonavigatebetweentheMathBN,AutoRst,andErrparameters.To
changeavalue,usethe and keystoscrollthroughvaluechoicesforeachvalue.Usethe
OKkeytoacceptchanges.
6.5.32ModbusRead
Shortdescription:
WhenthereisahighlevelatEn,theModbusReadblockwillbeactivatedandthexLogicshall
communicatewithaperipheraldeviceasamasterviaRS232orRS485interface.Furthermore,the
outputwillbeswitchedonwhencommunicationisestablishedsuccessfully.Otherwisetheoutput(Qpin)
remains “off” whichmeanscommunicationhasfailed.
AsignalatinputRresetsoutputQanddisablesthisblockatthesametime