Omron R88M-K Series User Manual page 383

Precautions for Correct Use
 Set the parameters so that the command pulse frequency multiplied by the electronic gear ratio
does not exceed 175 Mpps*. If 175 Mpps* is exceeded, alarm 27.2 will occur.
Example:
The following calculation is for an incremental encoder with a resolution of 1,048,576, an
electronic gear setting of 500 (Pn008 = 500), and a command pulse frequency of 100 kpps.
100 Kpps × 1,048,576/500 = 209,715,200 = 209.7152 Mpps, which exceeds 175 Mpps*.
The calculation changes as follows if the electronic gear is set to 5,000 (Pn008 = 5,000) and the
command pulse frequency is 100 kpps.
100 Kpps × 1,048,576/5,000 = 20,971,520 =20.97152 Mpps, which does not exceed
175 Mpps*.
* Alarm 27.2 will occur if 3 Gpps is exceeded when using software version 1.10 or higher.
The software version can be checked on the front panel or with the CX-Drive.
For information on checking the software version on the front panel, refer to 9-4 Setting the
Mode.
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
6-4 Electronic Gear Function
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