Chapter 6 Control Modes of Operation ASDA-B2
6-8 Revision September 2013
Please note:
1. In PT mode, the setting value of P1-44 can be changed only when the servo
drive is enabled (Servo On).
P1-45▲
GR2 Electronic Gear Ratio (Denominator) (M)
Address: 015AH
015BH
Operation
Interface:
Keypad/Software Communication
Related Section:
Section 6.2.3
Default: 10
Control
Mode:
PT
Unit: pulse
Range: 1 ~ (2
31
-1)
Data Size: 32-bit
Display
Format:
Decimal
Settings:
This parameter is used to set the denominator of the electronic gear ratio. The
numerator of the electronic gear ratio is set by P1-44. P2-60 ~ P2-62 are used to set
the additional numerators.
As the wrong setting may cause motor to run chaotically (out of control) and it may
lead to personnel injury, therefore, ensure to observe the following rule when setting
P1-44, P1-45.
The electronic gear ratio setting (Please also see P1-44, P2-60 ~ P2-62):
f1
f2 = f1 x
N
M
N
M
Pulse input
Position
command
The electronic gear ratio setting range must be within: 1/50<N/M<25600.
Please note:
1. In PT mode, the setting value of P1-45 can not be changed when the servo drive
is enabled (Servo On).
The electronic gear function provides easy travel distance ratio change. However, the over
high electronic gear ratio will command the motor to move not smoothly. At this time, the users
can use low-pass filter parameter to improve this kind of situation. For example, assume that
the electronic gear ratio is equal to 1 and the encoder pulse per revolution is 10000ppr, if the
electronic gear ratio is changed to 0.5, then the motor will rotate one pulse when the command
from external controller is two pulses.
For example, after the proper electronic gear ratio is set, the reference travel distance is 1
m/pulse, the machinery will become easier to be used.
f1: Pulse input f2: Position command
N: Numerator, the setting value of P1-44 or
P2-60 ~ P2-62
M: Denominator, the setting value of P1-45
VARITEL INGENIERIA ELECTRONICA S.A.
info@varitel.com - www.varitel.com - Tel. (54) 11-4243-1171 / Fax: (54) 11-4292-7545
Manuel Baliña 456, Lomas de Zamora (B1832CCJ) Buenos Aires, Argentina.
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