DrvControlModbusACS (FB)

FUNCTION_BLOCK DrvControlModbusACS

This Function block can be used to control ACS drives with ABB Drives profile or ABB Drives enhanced profile using Modbus communication block.

StatusWord (Sw) is read from drive through Modbus communication block using inout variable DriveData.

ControlWord(Cw) will be build by the function block according to the ABB drives profile state machine. Controlword will be send via inout DriveData and used communication block to the drive

Function block provides standard start/stop signals to control the drive and standard diagnosis signals are read from the drive. .. NOTE:: This function block must be used for ACS drives using ABB drives profile for Modbus protocol only. The data transfer to the ACS drive is realized via the IN_OUT variable DriveData, which must be connected to DrvModbusTcp or DrvModbusRtu function block.

InOut:

Scope

Name

Type

Initial

Comment

Input

Enable

BOOL

FALSE

1: A rising edge (Enable = TRUE) starts the operation, the output Busy goes to TRUE. All other inputs are read and considered continuously. A falling edge (Enable = FALSE) aborts the operation. During Aborting the Busy is still TRUE. Afterward all outputs are reset.

SwitchOn

BOOL

FALSE

2: SwitchOn, TRUE = Start; FALSE = stop along currently active stop ramp - No rising edge needed to restart if AutoStart = TRUE

Run

BOOL

FALSE

3: Start normal operation. Bit 3 on Control Word. If Run = FALSE drive stops, Stop mode depends on parametrization of the drive - no rising edge needed

StopEmcyCoast

BOOL

TRUE

4: Low active, emergency coast stop to drive: FALSE = stop by coast, TRUE = no stop

StopEmcyRamp

BOOL

TRUE

5: Low active, emergency ramp stop to drive: FALSE = stop by ramp, TRUE = no stop

Reset

BOOL

FALSE

6: Reset drive faults

AutoStart

BOOL

FALSE
7: Enables the autostart function, together with SwitchOn and Run an internal retry to restart the drive is performed steadily.

Eg. after return from local control. Be careful, Drive will restart automatically! Check the settings made in the Start mode Parameter group of the drive Ex: 21.01 Start Mode in ACS380/ ACS880

ExtCtrlLoc

BOOL

FALSE

8: External control location EXT2, mapped to control word 11 in the drive.

ControlWordB12

BOOL

FALSE

9: Bit 12 on Control Word - according to user specific drive configuration.

ControlWordB13

BOOL

FALSE

10: Bit 13 on Control Word - according to user specific drive configuration.

ControlWordB14

BOOL

FALSE

11: Bit 14 on Control Word - according to user specific drive configuration.

ControlWordB15

BOOL

FALSE

12: Bit 15 on Control Word - according to user specific drive configuration.

SpeedRef

INT

0
13: Speed reference value as 16bit integer: -20000 .. 20000 will be send to drive as reference value1.

Valid range: for ACS880 and ACX5x0 limited to -20000 .. +20000. See drive manual for specific scaling parameter, e.g. ACS580= Par.30.12, ACS880= Par30.12

RefValue2

INT

0
14: Reference value 2 as 16bit integer to drive -10000..+10000 will be send to drive as reference value2.

Valid range: for ACS880 and ACX5x0 limited to -10000 .. +10000 See drive manual for specific scaling parameter, e.g. ACS580= Par.30.20, ACS880= Par30.20

Inout

DriveData

DrvDataType

15: drive reference variable to connect to all function blocks of this drive

Output

Busy

BOOL

FALSE

1: Operation is running (while output Error is FALSE)

Error

BOOL

FALSE

2: Operation is stopped with error (while output Busy is FALSE). This output is TRUE for at least one cycle or until Enable is set to FALSE. The output ErrorID gives more details about the error.

ErrorID

ERROR_ID

3: Error Code

WarnAct

BOOL

FALSE

4: Active warning. Operation is running with warning. This output is TRUE for at least one cycle or until Enable is set to FALSE. The output WarnIDLast gives more details about the warning.

WarnIDLast

WARNING_ID

5: Warning code of last active warning

NoConToDrive

BOOL

FALSE

6: StatusWord = 0; Most probably reason: No connection to drive can be established. Check output Online of communication block. If Online is TRUE and NoConToDrive is still high, then restart the drive.

Ready

BOOL

FALSE

7: Ready to switch on - Bit 0 in SW

Operating

BOOL

FALSE

8: Operating - drive is modulating Ready reference, Bit 2 in SW

OnInhibited

BOOL

FALSE

9: On inhibited active - start not possible, Bit 6 in SW

AtSetpoint

BOOL

FALSE

10: Actual value is in setpoint tolerance zone, Bit 8 in SW

Tripped

BOOL

FALSE

11: Drive is tripped, Bit 3 in SW

Alarm

BOOL

FALSE

12: Drive has an alarm, Bit 7 in SW

LocalCtrl

BOOL

FALSE

13: Drive control location: Local - NOT(Bit 9) in SW (Not Remote)

ExtCtrlLocAct

BOOL

FALSE

14: Actual external control location EXT2 selected

ExtRunEnable

BOOL

FALSE

15: External Run Enable signal received, must be set to run. Source is chosen via 20.12 (ACS880 / ACS580)

ActSpeed

INT

0
16: Actual speed read from drive. For scaling see drive documentaion.

Mostly -20000 .. +20000 e.g.: Ref1min/ Ref1max Par30.11/12 for ACS5x0 or ACS880

ActValue2

INT

0

17: Actual value 2 read from drive

ActStatusWord

WORD

0

18: Actual StatusWord read from drive

UsedControlWord

WORD

0

19: used ControlWord, built in function block *)

Message

STRING(65)

‘’

20: Text message, state of ABB-Drives profile state machine