NORD Drivesystems BU0550 - Manual (Page 57)

3 AWL (Instruction List, IL)
BU 0550 GB-0813 57
3.5.2.7 MC_Home
Causes the frequency inverter to start a reference point run if EXECUTE changes from 0 to 1 (flank). The
frequency inverter moves with the setpoint frequency entered in VELOCITY. The direction of rotation is
reversed if the input with the position reference signal (P420[-xx] = Reference point) becomes active. With
the negative flank of the position reference signal the value in POSITION is adopted. Then the frequency
inverter brakes to 0Hz. The DONE signal changes to 1. During the entire HOME run the BUSY output is
active.
If the MODE input is set to 1, the FI remains at the middle of the initiator after a home run.
If the process is interrupted (e.g. by another MC function module), COMMANDABORTED is set.
In case of error, ERROR is set to 1. In this case, DONE is 0. The corresponding error code in the ERRORID
applies.
Table 77 MC_Home
3.5.2.8 MC_Power
The output stage of the frequency inverter can be switched on or off via this function. The output stage is
enabled if the ENABLE input is set to 1. The prerequisite for this is that the FI is in the status "Switch-on
block" or "Standby". If the FI is in the status "Error" or "Error reaction active", the fault must first be remedied
and acknowledged. Only then can enabling be carried out via this block. Switch-on is also not possible if the
frequency inverter is in the status "Not on standby". In all cases the FB goes into error status and ENABLE
must be set to 0 in order to acknowledge the error.
The frequency inverter is switched off if the ENABLE input is set to 0. If this happens while the motor is
running, it is first run down to 0Hz via the ramp set in P103.
The STATUS is 1, if the output stage of the frequency inverter is switched on. Otherwise it is 0.
ERROR and ERRORID are reset, if ENABLE is switched to 0.
Table 78 MC_Power
VAR_INPUT VAR_OUTPUT
Input Explanation Type Output Explanation Type
EXECUTE Enable BOOL DONE Specified setpoint position reached BOOL
POSITION Setpoint position DINT BUSY Home run active BOOL
VELOCITY Setpoint frequency INT COMMAND-
ABORTED Command aborted BOOL
MODE Home mode BOOL ERROR Error in FB BOOL
ERRORID Error code INT
ERRORID Explanation
0 No error
1000h FI is not enabled
1200h Position control not activated
1201h The High position has not been entered in the PLC setpoints (P553)
1202h The Low position has not been entered in the PLC setpoints (P553)
VAR_INPUT VAR_OUTPUT
Input Explanation Type Output Explanation Type
ENABLE Enable BOOL STATUS Motor is supplied with current BOOL
ERROR Error in FB BOOL
ERRORID Error code INT
ERRORID Explanation
0 No error
1001h Stop function is active
1300h The FI is not in status "Standby" or "Switch-on block"