5.3 Description of Function Codes 5.3.9 d codes (Applied functions 2)
Application specific function selection
d41 selects/deselects line speed control or master-follower operation (immediate synchronization mode at the start,
start after synchronization).
Line speed control suppresses an increase in line speed resulting from the increasing radius of the take-up roll in a
winder system.
Master-follower operation drives two or more shafts of a conveyer while keeping their positions in synchronization.
Application specific function selection (d41)
Sets whether to enable/disable constant surface speed control and master-follower operation (immediate
synchronization mode at the start, start after synchronization).
Line speed control with speed sensor
Note: This control is valid only when “V/f control with speed sensor” or “Vector control
with speed sensor (with auto torque boost)” is selected with F42, A14, b14, or r14 (data = 3
or 4).
Master-follower operation (Immediate synchronization mode at the start, without Z phase)
Master-follower operation (Follow-up mode during acceleration)
Master-follower operation (Immediate synchronization mode at the start, with Z phase)
In a winder system (e.g., roving frames, wiredrawing machines), if the inverter continues to run the motor at a
constant speed, the take-up roll gets bigger with materials (roving, wire, etc.) and its radius increases so that the
winding speed of the take-up roll increases. To keep the line speed (winding speed) constant, the inverter detects
the winding speed using a speed sensor (encoder) and controls the motor rotation according to the encoder
feedback.
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