Siemens SINUMERIK 880 SW 6 Planning Manual page 301

9 Axis/PLC Interface (DB 32)
9.3 Signals to axis
Note:
If the servo enable signal is cancelled (e.g. to clamp the axis) and the controller is subsequent-
ly enabled again, the axis is returned to its position when the servo enable is cancelled to
compensate for any change in position caused by mechanical or electrical influences.
Setup modes
1 signal: Closes position control loop of the relevant axis.
0 signal: 1. With the axis stationary, the position control loop is opened.
2. If the axis is in motion, rapid deceleration is effected.
The drive is brought to a standstill with maximum braking current and the
position control loop opened after the time delay set by machine data has run
.
down Only actual values are carried (follow-up mode).
Notes:
• A following error remaining after rapid deceleration remains stored and is eliminated
following a renewed servo enable.
• An NC alarm is output if the servo enable is cancelled while an axis is in motion.
• During normal operation the servo enable signals must be present for all axes to be moved
with interpolation.
1
2
3
4
5
6
1: TRAVEL COMMAND signal (e.g. X +)
2: X axis clamp
3: SERVO ENABLE X signal
4: FEED DISABLE X signal
5: *Servo disable X
6: X axis in motion (t = delay time)
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Siemens AG 1991 All Rights Reserved
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SINUMERIK 880 (PJ)