NORD Drivesystems BU0550 - Manual (Page 54)

PLC logic for NORD SK 54xE frequency inverters
54 BU 0550 GB-0813
3.5.2.3 MC_MoveVelocity
Sets the setpoint frequency for the frequency inverter if EXECUTE changes from 0 to 1 (flank). If the
frequency inverter has reached the setpoint frequency, INVELOCITY is set to 1. While the FI is accelerating
to the setpoint frequency the BUSY output is active. If EXECUTE has already been set to 0, INVELOCITY
is only set to 1 for one cycle.
If the process is interrupted (e.g. by another MC function module), COMMANDABORTED is set.
With a negative flank on EXECUTE all outputs are reset to 0.
VELOCITY is entered with scaling according to the following formula:
VELOCITY = ( Setpoint frequency (Hz) × 0x4000 ) / P105
Table 73 MC_MoveVelocity
VAR_INPUT VAR_OUTPUT
Input Explanation Type Output Explanation Type
EXECUTE Enable BOOL INVELOCITY Specified setpoint frequency
reached BOOL
VELOCITY Setpoint frequency INT BUSY Setpoint frequency not yet reached BOOL
COMMAND-
ABORTED Command aborted BOOL
ERROR Error in FB BOOL
ERRORID Error code INT
ERRORID Explanation
0 No error
1000h FI is not enabled
1100h FI not in speed mode
1101h No setpoint frequency parameterised (P553)