Features:
- The FM 353 executes single-axis positioning jobs for a stepper drive.
- Dedicated inputs connect reference, measurement and positioning signals.
- The S7-300 backplane exchanges commands and status with the PLC program.
The module separates time-critical motion generation from the controller scan.
Field inputs change the active motion sequence according to their configured functions.
A differential drive path transfers the generated step and direction signals.
The Siemens 6ES7353-1AH01-0AE0 SIMATIC S7-300 FM 353 Positioning Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6ES7353-1AH01-0AE0 FM 353 Positioning Module Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Following a positioning job from the PLC to the drive
- PLC job: The S7-300 program transfers the target and operating command through the rack.
- FM processing: The module converts the job into the timing required by the configured stepper axis.
- Drive command: Differential signals pass the step and direction information to the power section.
- Status return: Axis state and job completion return to the PLC for sequence control.
Assigning machine contacts to positioning functions
- Reference cam: The homing sequence uses the contact assigned to the reference function.
- Measurement input: A flying-measurement event captures the active position without stopping motion.
- Start and stop: Configured contacts can begin or interrupt the positioning sequence.
- Input check: Signal level and assignment must agree with the stored FM 353 parameters.
Keeping the pulse path distinct from auxiliary outputs
- Differential link: The drive interface carries the stepper command signals.
- Cable boundary: Shielded drive wiring remains within the documented 35 m limit.
- Digital outputs: Four protected channels switch their separately assigned machine signals.
- Power section: The connected stepper amplifier converts the module commands into motor current.
Restoring the module, connector and project as one axis
- Rack data: Commands and status exchange through the S7-300 backplane.
- Front supply: The 24 V DC input powers the field-side circuits.
- Connector record: The 20-pin field wiring must return to the same input and output functions.
- Axis data: The saved hardware and positioning parameters complete the replacement.