ABB ACQ810 - Page 31

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Quickstart Guide
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ABB PLC and drives integration using Modbus RTU
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ModbusRTU‐31‐ PLCanddrivesintegration
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Createasecondnetwork(Ctrl+T)inthesameprogramandaddtheblock“ACS_DRIVES_CTRL_STANDARD”inthe
samewayasfor“ACS_COM_MOD_RTU”.Connectthefunctionblockinputsandoutputsaccordingtoyourneeds.
Intheexamplebelow:
 Theblockwillalwaysbeenabled
 Thedriveisst
artedbythevariable“DriveStart”
 Emergencystopfunctionsarenotusedinthisexample
 Rampstopbysetting“DriveStart”= FALSE
 Coaststopbysetting“DriveCoastStop”=TRUE
 Faultresetbysetting“DriveResetFault”=TRUE(positiveedge).
 Speed reference is set by the variable “SpeedRef” as a value between‐2000
0 and 20000, where 20000
correspondstoaparameterinthedrive(seechapter“Driveconfiguration”).
The variables declared between “VAR” and “END_VAR” in the picture below are local variables inside this
program.(Toaccessthemfromanotherparte.g.anyvisualizationtheprogramsnamehastobeusedfollowedby
adotandthevariablesna
me.E.g.“Drive1.DriveOperating
Note!Thevariableconnectedto“ACS_DRIVES_CTRL_STANDARD”→“DRIVE_DATA”mustbethesameastheone
connectedto“ACS_COM_MOD_RTU”→“DRIVE_DATA”andmustbeoftype“ACS_DRIVE_DATA_TYPE”. 
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