Delta Electronics ASDA-A2 Series User Manual page 156

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P1 - 45▲ GR2
Default: 10
Applicable Control Mode: PT, PR
Unit: pulse
Range: 1 ~ (2
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 numberators.
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):
Pulse input
The electronic gear ratio setting range must be within: 1/50<N/M<25600.
Please note:
1. In PT and PR mode, the setting value of P1-45 can not be changed when the
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.
Revision January 2011
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Electronic Gear Ratio (Denominator) (M)
-1)
31
Position
N
command
M
f1
f2 = f1 x
servo drive is enabled (Servo On).
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Chapter 6 Control Modes of Operation
f1: Pulse input
N: Numerator, the setting value of P1-44 or
N
M
P2-60 ~ P2-62
M: Denominator, the setting value of P1-45
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Address: 015AH, 015BH
Related Section:
Section 6.3.6
f2: Position command
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