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7-6 Electronic Gear Function
OMNUC G5-series AC Servomotors and Servo Drives User’s Manual (with Built-in EtherCAT Communications)
Applied Functions
7-6 Electronic Gear Function
This function controls the position by using the value multiplied the position command entered
on the Host Controller by the preset electronic gear ratio. The functions is used in the Position
Control and Fully-closed Control modes. (This applies only when the communications cycle is
1, 2, or 4 ms.)
For communications cycles for which the electronic gear is not supported (250 or 500 µs), a
Function Setting Error (Error No. 93.4) will occur if the electronic gear is enabled.
When connected to an OMRON CJ1W-NC@81/@82 Position Control Unit, the electronic gear
ratio is set in the Position Control Unit. Set the electronic gear ratio in the Servo Drive to 1:1.
Objects Requiring Settings
*1. The electronic gear ratio must be set between 1/1000 and 1000. If it is set outside the range, an Object Setting Error
1 (Error No. 93.0) will occur.
Whether the electronic gear is enabled is determined from the setting of the objects. If the gear ratio setting is 1:1,
the electronic gear is disabled.
*2. If object 6091-01 hex is set to 0, the encoder resolution is set to the numerator during fully-closed control also.
Index Sub-index Name Explanation Reference
6091 hex
01 hex
Motor revolutions
*1
Set the numerator of the electronic gear ratio.
If the set value is 0, the encoder resolution is
automatically set as the numerator.
*2
• 131072 for a 17-bit absolute encoder
• 1048576 for a 20-bit incremental encoder
page 6-44
02 hex
Shaft revolutions
*1
Set the denominator of the electronic gear ratio.
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