Gain Adjustment Of Analog Monitor Output (Fn00D) - YASKAWA SGDV User Manual

7 Utility Functions (Fn
7.9

Gain Adjustment of Analog Monitor Output (Fn00D)

If connecting an analog monitor unit, the analog monitor signal output (factory setting: torque monitor or
motor speed monitor) can be monitored. The gain is adjusted in the analog monitor unit at the factory. The
user need not usually use this function. To adjust the gain manually, use this function.
(1) Adjustment Example
An example of gain adjustment to the motor rotating speed monitor is shown below.
Gain-adjustment Range
Adjustment Unit
The gain adjustment range is made with a 100% output set as a center value (adjustment range: 50% to 150%).
The following is a setting example.
<Setting the Set Value to −125>
100% + (−125 × 0.4) = 50%
Therefore, the monitor output voltage is 0.5 time as high.
<Setting the Set Value to 125>
100% + (125 × 0.4) =150%
Therefore, the monitor output voltage is 1.5 times as high.
Note: The adjustment value will not be initialized when parameter settings are initialized using Fn005.
(2) Preparation
The following condition must be met to adjust the gain of the analog monitor output.
• The write prohibited setting parameter (Fn010) must be set to Write permitted (P.0000).
7-16
)
Analog monitor
output voltage
1 [V]
1000 [min
Item Specifications
100±50%
0.4%/LSB
Gain adjustment
-1
]
Motor speed