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3.2
Removing the FM 453
Rules
No particular protective measures (EGB Guidelines) are necessary for the
removal of the FM 453.
Note
Please refer to Appendix B in the manual S7-400/M7-400 Programmable
Controller, Hardware and Installation.
Tools Required
A 4.5 mm (0.18 inch) screwdriver.
Procedure
To remove the FM 453:
1. Release the protective device on the front connector and unplug it.
2. Unlock the connector cover.
3. Detach the sub-D plugs from the encoder and drive unit.
4. Loosen the module fastening screws.
5. Swing the module out of the rack and unhook the module.
3.3
Module Replacement
Overview
If a defective FM 453 has to be replaced, and no programming device/PC is
available for parameterization, or the module is to be replaced while the sys-
tem is switched on, please note the following start-up requirements (CPU,
FM):
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
An SDB
1 000 should be generated in order to complete the startup
(for storing the parameter data); see Section 5.5.
In the user program:
– Integration of OB 83 "Remove/Insert interrupt", see Chapter 6
– Interrupt communication with the FM 453 before removing the old
FM, and resume communication after installing the new FM.
– If data/parameters are modified during operation and stored reten-
tively on the FM, please follow the instructions in Section 9.3.1.
Installing and Removing the FM 453
3-3
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