July 2013 6.8 The control loop 845
Clamping the axes After running an NC block you can clamp the axes.
If necessary, define in MP7494 the axes for which an exact stop is to occur
after positioning.
Wait until "axis in position" is set in W1026/W1104.
Clamp the axis or axes.
Open the position control loop with W1040/W1132.
With Module 9161, switch the drive off.
A waiting period is necessary between "axis clamping" and "position control
loop opening."
In W1038/W1128, set the bit for the corresponding axis.
The next NC block is not run until the positioning window has been reached
and the position control loop has been opened with W1040/W1132.
If the position control loop is opened, the axis release in W1024/W1100 is
canceled. You can link switching off the drives via Module 9161 with W1024/
W1100.
If a clamped axis is to be repositioned, the NC cancels the "axis in position"
message in W1026/W1104:
With Module 9161, switch the drive on.
Release the clamping.
Close the position control loop with W1040/W1132.
MP7494 Axes for which an exact stop is to occur after positioning
Format: %xxxxxxxxxxxxxxxxxx
Input: 0: No exact stop
1: Exact stop
Set Reset
W1038/1128 Prepare to open the position control
loop
Axis-specific: Dependence on MP4020
bit 14
0: Not active
1: Active
PLC PLC
W1040/1132 Axis-specific opening of the position
control loop
Axis-specific: Dependence on MP4020
bit 14
0: Do not open the position control loop
1: Open the position control loop
PLC PLC
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