Omron R88D-GT series User Manual page 365

Pn48 Electronic Gear Ratio Numerator 1
Setting range 0 to 10000
Pn49
Electronic Gear Ratio Numerator 2
Setting range 0 to 10000
Pn4A
Electronic Gear Ratio Numerator Exponent
Setting range 0 to 17
Pn4B Electronic Gear Ratio Denominator
Setting range 0 to 10000
• Use these parameters to set the electronic gear.
• The electronic gear can be used for the following:
• To set the amount of Servomotor rotation or movement per input command pulse.
• To increase the nominal command pulse frequency by using a multiplier when the desired
Servomotor speed cannot be achieved due to the limited pulse oscillation capability of the host
controller.
• Electronic Gear Block Diagram
Command pulses
f
*1. Numerator 1 or Numerator 2 is selected using the Electronic Gear Switch Input (GESEL: CN1 pin
28).
GESEL input open
GESEL input connected to COM Numerator 2 (Pn49) selected.
• The gear ratio is set using the following equations.
If the numerator
Numerator ((Pn48 or Pn49) × 2
In this case, the number of command pulses per revolution can be set in Pn4B.
Electronic gear ratio =
If the numerator
Electronic gear ratio =
The upper limit of the calculated numerator ((Pn48 or Pn49) × 2
+ 1).
Unit ---
Unit ---
Unit ---
Unit ---
Exponent (Pn4A)
Numerator 1 (Pn48)
*1
× 2
Numerator 2 (Pn49)
*1
Denominator (Pn4B)
Numerator 1 (Pn48) selected.
equals 0, the following value is set automatically.
Pn4A
) = Encoder resolution
Number of command pulses per Servomotor rotation (Pn4B)
does not equal 0, the gear ratio is as follows:
Electronic gear ratio numerator (Pn48 or Pn49) × 2
5-16 User Parameters
Default setting 0
Default setting 0
Default setting 0
Default setting 10000
Internal
+
command
−
F
Feedback
pulses
(resolution)
Encoder resolution
Electronic gear ratio numerator exponent (Pn4A)
Electronic gear ratio denominator (Pn4B)
Pn4A
) is 4,194,304/ (Pn4D setting
Position
---
Power OFF→ON
Position
---
Power OFF→ON
Position
---
Power OFF→ON
Position
---
Power OFF→ON
To deviation
counter
10,000 pulses/rev
or
17
2 pulses/rev
5-78
5