Features:
- Controls one point-to-point axis with locally generated velocity and acceleration profiles.
- Quadrature feedback supports position tracking to 100 kcounts per second.
- A bipolar analog command interfaces with a compatible servo amplifier.
The module closes the positioning function around encoder feedback and a servo command while the PLC supplies move parameters and monitors status. It uses both input and output references for this exchange.
Manual jog is intended for controlled setup, not for bypassing unproven limits. Verify travel direction and the response of each limit at reduced speed.
Motion accuracy begins with mechanical and electrical scaling. Encoder resolution, gearing, sign, and analog command polarity must agree throughout the axis.
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GE Fanuc IC655APU521 Axis Positioning Module Manuals, Datasheets, Links
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.
How a point-to-point move is shaped
- Destination: The commanded position defines the final count.
- Velocity: Travel speed is part of the module move data.
- Acceleration: The profile controls how speed changes at start and stop.
- Override: Velocity demand can be adjusted within the application design.
Relating encoder counts to real travel
- Quadrature input: A/B phase supplies movement and direction.
- Count rate: Feedback frequency must remain within the module limit.
- Counts per unit: Derive the scale from encoder resolution and gearing.
- Sign check: Confirm positive counts correspond to the intended direction.
Connecting the positioning module to the drive
- Analog command: A bipolar ±10 V reference requests motor direction and effort.
- Enable path: The servo must receive a valid permissive independently of command value.
- Polarity: Reverse wiring can reverse motion direction.
- Measurement: Compare commanded and measured voltage at the amplifier.
Checks before automatic axis operation
- Travel limits: Prove both ends of permitted motion.
- Jog test: Use reduced speed to verify direction.
- Stop path: Confirm emergency and program stopping behavior.
- Reference position: Establish machine zero with the approved sequence.