Improvement Of Speed Detection With Single-Phase Encoder - Hitachi WJ200-001S Instruction Manual

Wj200 series single/three-phase inputs 200v/400v class
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Improvement of speed detection with single-phase encoder

P900 can switch half cycle / whole cycle of pulse input at speed detection with single-phase encoder. Please
set 01 to P900 if detection precision is not high due to the dispersion of duty ratio of single-phase encoder.
If the result of speed detection with pulse input of single-phase encoder is not stable even if P900 is set to 01,
please adjust P901. Because a response changes depends on P901 value, please be careful.
Func.
Func.
Func.
Func.
Name
Name
Name
Name
Code
Code
Code
Code
P900
P900
Single-phase encoder pulse
P900
P900
input half cycle / whole cycle
select
P901
P901
P901
P901
Filter time constant for
speed detection
Table Ver.3.1-2
Description
Description
Description
Description
00...Half cycle
00
00
00
0 0 0 0 1 1 1 1 ...Whole cycle
It effects speed detection by
encoder pulse input,
range is 0 to 9999 msec.
Modbus register
Modbus
register
Modbus
Modbus
register
register
A A A A B B B B
Initial data
Initial data
Initial data
Initial data
number
number
number
number
00
16f6h
20
14f1h
Ver.3.1− − − − 3
Resolution
Resolution
Resolution
Resolution
-
1 [ms]

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