Siemens SIMATIC FM 453, Manual

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FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
7.3.11 Activating Stepper Motor Diagnostics
Once optimization of stepper motor control is completed, activate the stepper
motor diagnostics as needed.
The boost signal is monitored in terms of its active time. This is in order to
protect the drive motor against overheating.
Refer to the stepper motor drive documentation for information regarding
maximum absolute and relative boost duration. Enter this information into
machine data MD48 and MD49, provided for that purpose.
When boost function is parameterized, the FM 453 triggers the errors “Boost
duration absolute” or “Boost duration relative” in the event that time for the
active phase(s) of the Boost signal is exceeded.
Once parameterization is completed, check the diagnostics function for effi-
cacy using a suitable test program with which particularly large proportions
of acceleration and braking phases occur during execution.
This diagnostics function cannot be activated in the control mode
MD61 = 1 with an encoder!
Activation is accomplished by way of the “Rotation monitoring” single-set-
ting function (refer to Section 9.7.3 for functional description of rotation
monitoring).
If the rotation monitoring function is programmed, the FM 453 will trigger
the “Rotation monitoring” error in the event that the stepper motor is unable
to follow the movement specified.
Check the efficacy of the diagnostics function. This is accomplished by elec-
trically separating the cyclic zero pulse encoder or the power section of the
stepper motor and executing a test movement in any operating mode.
Overview
Boost
Rotation Monitor-
ing
Starting up the FM 453