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9.3.2
Single Functions (Job No. 10)
Overview
You can use this function to transfer single settings to the FM 453 and acti-
vate the corresponding functions. These settings are:
Callup of Single
The individual functions remain activated until they are reset.
Settings
Length
Since both functions use the same digital input on the FM 453, only one
Measurement,
function can be executed at a time. In double activations, both functions are
Inprocess
switched to inactive. An error message is issued.
Measurement
For function description, see Section 9.3.10
Retrigger
A precondition for retrigger reference point is that the axis has been synchro-
reference point
nized by reference point approach.
With this setting, the axis is synchronized at each positive edge of the zero
mark, after leaving the reference-point switch (RPS) in the direction of the
zero mark (direction as in Reference-Point Approach). Regardless of the
instantaneous speed, at this moment the reference-point coordinate is
associated with the current actual position, taking any active shift into ac-
count.
When crossing the RPS, a signal length of ∆t
sured!
The resulting change in the actual value causes no internal changes in the
target.
When a Set Actual Value On-the-Fly is pending, activation of Retrigger Ref-
erence Point is interlocked.
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
Length measurement
Measurement on-the-fly
Retrigger reference point
Switch off enable output
Follow-up mode (only for drives with encoders)
Switch off software end position monitoring
Rotation monitoring (only for step drive without encoder)
Switch off automatic drift compensation (only for servo drive)
Enable CL controller
Parking axis
Simulation
Description of Functions
2 FM cycle must be as-
9-39
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