Siemens SIMATIC FM 453, Manual

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9-41
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
This function can be used to switch off the automatic drift compensation.
Automatic drift compensation means:
The drift is balanced to zero by an automatic matching of the analog actuat-
ing signal.
S
The setting can be switched on or off if the axis is not in motion.
S
Automatic drift compensation has no effect:
– in Control mode
– in the Follow-up Mode setting
– if there is no servo enable
– in the absence of a controller ready signal (if parameterized)
– if the axis is in motion.
You can use this function to:
S
activate position control (the prerequisite for closed-loop-controlled op-
eration of the FM 453)
S
to switch the signal through to the drive as indicated in MD37
S
to provide control of stops between movements in the Control mode.
This function can be used to change over the measurement system while the
complete system is running.
With this setting:
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Encoder synchronization (SYN = 0) is deleted
S
Pending error messages are deleted and no new ones are triggered (in-
cluding diagnostic interrupts)
S
Digital outputs are inactive; analog voltage 0 V.
The setting can be switched on or off if “Processing in progress” = 0.
You can use this function to:
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Test function sequences without the drive and measuring system.
S
Evaluate all digital inputs (Caution, if you are going to simulate se-
quences that use such signals, they should be connected to the inputs
of the FM 453 - e.g. for Reference-Point Approach).
S
The servo simulates a controlled system; “Controller Ready” is not neces-
sary.
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The setting can be switched on or off if “Processing in progress” = 0.
S
All internal function sequences behave as in normal operation.
When the function is deactivated, the axis is reset internally (see Restart,
Section 9.3.3).
Deactivate
Automatic Drift
Compensation
Servo Enable
Parking Axis
Simulation
Description of Functions