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11.7
Stopping the motor using PROFIdrive
There are four methods of stopping the motor, these are:
•
Disable Operation (control word bit 3) - Drive is inhibited, motor coasts down
to zero speed, status set to 'Switched On'.
•
Ramp Stop (control word bit 0) - Motor decelerates under ramp control using
deceleration rate1 (Pr 2.21), drive is inhibited, status set to 'Ready For
Switching On'.
•
Quick Stop (control word bit 2) - Motor decelerates under ramp control using
deceleration rate2 (Pr 2.22), drive is inhibited, status set to 'Switching On
Inhibited'.
•
Coast Stop (control word bit 1) - Drive is inhibited, motor coasts down to zero
speed, status set to 'Switching On Inhibited'.
11.8
Jogging
In order to use the jogging functions, the drive must be in the operational state (S4) and
at standstill and each of the three bits (4, 5 and 6) of the control word must be set to a 0,
if any of these three bits are set to a 1 and the drive is at standstill then the jogging
functions are disabled and the main setpoint reference is used. The three control bits (4,
5 and 6) have no effect when in jog mode.
To leave jog mode, both jog bits (8 and 9) must not be active and the drive must be at
standstill, the normal control bits (4, 5 and 6) will then be active.
The jog direction is controlled by bit 8 (forward) and bit 9 (reverse) of the control word as
illustrated in Figure 11-2.
The jog setpoint is set in Pr 1.05.
NOTE
If both jog forward and jog reverse setpoints are selected at the same time (bits 8 and 9
NOTE
are both set to a 1) then there will be no change to the jog direction. (i.e. if jog forward
was previously selected then the motor will continue to jog forward, and if jog reverse
was previously selected then the motor will continue to jog in the revese direction).
The following sequence can be used to jog the motor in the forward direction:
•
Enable network control (bit 10 = 1, 0x0400)
•
Remove all STOP commands (bits 1 & 2 = 1, 0x0406: S1 to S2)
•
Set drive to Ready (bit 0 = 1, 0x0407: S2 to S3)
•
Enable operation (bit 3 = 1, 0x040F: S3 to S4)
•
Set jog direction forward (bit 8=1 and bit 9=0, 0x050F) or
•
Set jog direction reverse (bit 8=0 and bit 9=1, 0x060F)
•
Set jog setpoint value (Pr 1.05)
The motor should now jog at the speed set by the jog setpoint value.
SM-PROFIBUS DP-V1 User Guide
Issue : a
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