Quickstart Guide
ABB PLC and drives integration using Modbus RTU
ModbusRTU‐20‐ PLCanddrivesintegration
StartingupACSM1driveswithFSCA01Modb
usRTUadapter
Minimumre
quiredparametersettings(basedonfactorydefaultsettings)
Parameter Description Setting Comment
50.01 FBAENABLE Enable Activatesfieldbusmodule
51.02 PROTOCOL/PROFILE ABBDrives
Classic
Communicationprofile“ABBDrives”
51.03 STATIONID [Address] ModbusRTUnodeaddressofthedrive
51.04 BAUDRATE 19.2kbit/s
(example)
Transferrateofthelink.Samebaudratemustbe
definedintheModbusRTUmaster.
51.05 EFBPARITY 8NONE1
(example)
Parityandstopbits.Sameparityandstopbits
mustbedefinedintheModbusRTUmaster.
52.01 FBADATAIN1 4 StatuswordasDataWord1fromthedrive
52.02 FBADATAIN2 5 ActualspeedasDataWord2fromthedrive
53.01 FBADATAOUT1 1 ControlwordasDataWord1tothedrive
53.02 FBADATAOUT2 2 SpeedreferenceasDataWord2tothedrive
51.27 FBAPARREFRESH REFRESH Updatesfieldbussettings(groups50to53)
10.01 EXT1STARTFUNC FBA Fieldbusinterfaceassourceforstartandstop
12.01 EXT1/EXT2SEL P.02.12bit15 FieldbusinterfaceassourcetoswitchtoEXT2
controllocation
24.01 SPEEDREF1SEL FBAREF1 Fieldbusinterfaceassourceforspeedreference
10.08 FAULTRESETSEL P.02.12bit8 Fieldbusinterfaceassourceforfaultreset
Optionalparameterse
ttings
51.06 MODBUSTIMEOUT [optional] Timebetweencommunicationbreakdetection
andtheselectedaction.1=100ms.
51.07 TIMEOUTMODE CONTROL
WRITE
Howthedrivereactstoafieldbuscommunication
break.
50.02 COMMLOSSFUNC [optional] Definesthedriveoperationafterthe
communicationlossmonitoringawakes.
51.27 FBAPARREFRESH REFRESH Updatesfieldbussettings(groups 50to53)
(25.02) SPEEDSCALING [Scalemax] Maxspeed/frequencyscalingvalue(usedin
functionblock/visualizationinput
“SPEED_REF_MAX”).Mustbelessorequaltodrive
parametermaxspeed/frequency.