Extending An Encoder Cable; Absolute Encoder Home Position Error Detection - YASKAWA SGM series User Manual

9) Absolute Encoder Home Position Error Detection

Cn-02 Bit 1
This memory switch is used to specify whether to use home position error detection
(alarm A.80) when an absolute encoder is used.
Setting
0
1
Normally, set this memory switch to "0."
This memory switch has no significance when an incremental encoder is used.

3.8.6 Extending an Encoder Cable

1) Both incremental and absolute encoders have a standard encoder cable (maximum 20
meters (65.6 ft.)). If a longer cable is required, prepare an extension cable as described
below. The maximum allowable cable length is 50 meters (164 ft.).
a) 3-meter (19.8 ft.) Cable with Connectors:
• For incremental encoder: DP9320089-1
• For absolute encoder: DP9320088-1
Home position error detection
TERMS
This function detects an encoder count error resulting from noise. It checks the number of
pulses per motor revolution, and outputs a home position error alarm if that number is incor-
rect.
If the absolute encoder detects an error, it inverts phase C and notifies the Servopack of the
error. In this case, this "home position error detection" function also works.
Absolute Encoder Home
Position Error Detection
Meaning
Detects a home position error.
Does not detect a home position error.
Factory For Speed/Torque Control
Setting: 0 and Position Control
3.8 Special Wiring
3
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