Input Description

EN (enable)

Data type: BOOL

The Function Block is activated (EN = TRUE) or deactivated (EN = FALSE) via input EN. If the block is active, the current values are available at the outputs. To start a new write job the input EN has to be set from FALSE to TRUE.

If the input values are valid, a request to perform a MODBUS job is sent to the Communication Block via the DRIVE_DATA variable. If at least 1 input is invalid, no job is generated and the error is displayed at the outputs ERR and ERNO instead.

START (start)

Data type: BOOL

With a rising edge at input START (FALSE -> TRUE) the ACS Drive is started. If START = FALSE the drive is stopped along the normal stop ramp, defined in the drive (e.g. Par. 22.03 for ACS355).

Note

According to the ABB Drives Profile a new rising edge of START input will be ignored by the drive until zero speed was reached.

After an emergency stop of the drive a new rising edge of the START input is required to restart the drive.

STOP_EMCY_COAST (stop emergency coast)

Data type: BOOL

Input STOP_EMCY_COAST=FALSE will coast the drive (bit 1 of the Control Word OFF2). A new rising edge of the START input is needed to start the drive again.

STOP_EMCY_COAST=TRUE enables normal operation of the drive.

Default value = TRUE.

STOP_EMCY_RAMP (stop emergency ramp)

Data type: BOOL

Input STOP_EMCY_RAMP = FALSE will stop the drive along the emergency ramp, defined in the drive (bit 2 of the Control Word OFF3). A new rising edge of the START input is needed to start the drive again.

STOP_EMCY_RAMP = TRUE enables normal operation of the drive.

Default value = TRUE.

STOP_COAST (stop coast)

Data type: BOOL

Input STOP_COAST = TRUE will coast the drive immediately (STOP_COAST = inverted Bit 3 of the Control Word – INHIBIT_OP). Setting STOP_COAST=FALSE will restart the drive immediately without need of an rising edge at input START.

RESET (reset)

Data type: BOOL

Input RESET is packed to bit 7 of the Control Word as long as input USE_CW=FALSE. RESET = TRUE resets faults and warnings in the drive. It does not reset the Function Block itself.

EXT_CTRL_LOC (external control location)

Data type: BOOL

Input EXT_CTRL_LOC is packed to bit 11 of the Control Word as long as input USE_CW=FALSE.

Input EXT_CTRL_LOC=TRUE sets the control place for the drive to EXT2 (Bit 11 in the Control Word to the drive). For normal control of the drive from the PLC EXT_CTRL_LOC should be set to FALSE.

SW (status word)

Data type: WORD

Status Word from drive. Connect Status Word from fieldbus to this input.