The stroke limit is activated and parameterised separately via the relevant command during direct or
record operation ("Command with stroke limit monitoring"). Referencing is not necessary. The para-
meterised, relative monitoring window is applied to the current position when a new command is star-
ted. The stroke limit configuration is invalid if the negative stroke limit is greater or equal to the posit-
ive stroke limit.
Application
–
Stroke limit monitoring without automatic braking:
An error message is triggered if the stroke limit is reached or exceeded. The drive is stopped with
the parameterised error response. The error message can only be acknowledged once the stop
ramp has expired.
–
Stroke limit monitoring with automatic braking:
Due to the current distance and speed, exceeding the stroke limit can be prevented by braking in
time. The dynamic acceleration and jerk values from the stop ramp parameters are used for the
projection.
An error message is triggered, and the drive is decelerated with the parameterised error response,
so that it comes to a standstill before the stroke limit, if possible. The error message can only be
acknowledged once the stop ramp has expired.
Timing
Status signal
STL…
Initial state of STLN/STLP signals
= 0
If stroke limit monitoring is activated for the command, the signal is set under the
following conditions:
–
STLN: If the actual position is lower than the parameterised negative stroke
limit
–
STLP: If the actual position is greater than the parameterised positive stroke
limit
–
STLN/STLP, if automatic braking is triggered
0
à
1
The signal is reset when a new command is started.
1
à
0
Tab. 319 Status signals - Stroke limit reached
Parameters and diagnostic messages
ID Px.
Parameters
Description
Specifies the negative stroke limit. The negative stroke limit
must be lower than the positive stroke limit.
Access
read/write
Update
effective immediately
10368
Default value negat-
ive stroke limit
Unit
user defined
Motion monitoring
332
Festo — CMMT-ST-SW — 2019-02
Содержание CMMT-ST-SW
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