Hitachi WL200 Series - Page 48

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The [AM] signal offset and gain are adjustable, as indicated below.
Func.
Description
Range
Default

[AM] output gain
0.~255.
100.

[AM] output offset
0.0~10.0
0.0
The graph below shows the effect of the gain and offset setting. To calibrate the [AM]
output for your application (analog meter), follow the steps below:
1. Run the motor at the full scale speed.
a. If the analog meter represents output frequency, adjust offset () first, and then
use  to set the voltage for full scale output.
b. If [AM] represents motor current, adjust offset () first, and then use  to set
the voltage for full scale output. Remember to leave room at the upper end of the
range for increased current when the motor is under heavier loads.
NOTE: As mentioned above, first adjust the offset, and then adjust the gain. Otherwise the
required performance cannot be obtained because of the parallel movement of the offset
adjustment.
Full scale (FS)
Hz or A
AM output
10V
0
1/2 FS
5V
=0~255
AM output gain adjustment
Full scale (FS)
Hz or A
AM output
10V
0
1/2 FS
5V
=0~10
Parallel
movement
AM output offset adjustment