Hitachi SJ Series User Manual page 175

Chapter 12
Internal arithmetic block diagram
Internal processing is schematically drawn.
Hz
Pulse string
1
frequency
G
acquisition
Pulse string frequency scale
G [CA-92]
(0.05kHz-32.00kHz)
For details of the pulse string input mode, see below.
Command frequency is determined by the frequency of
the pulse string input.
The sign of the command frequency is determined in the
following way.
(1) Mode 0: [CA-91]=00 90° phase difference pulse string
(2) Mode 1: [CA-91]=01 forward and reverse rotation
commands + pulse string
(3) Mode 2: [CA-91]=02
Forward rotation pulse string + reverse rotation pulse string
Forward rotation
pulse string input
Reverse rotation
pulse string input
Bias, limit, cut
(%)
100
Limit
%
1
Cut
Outpu 0
1+sT
t
Cut
Limit
-100
-100
Filter time constant T
[CA-93]
(0.01s~2.00s)
Upper limit [CA-95]
(0.00%-100.00%)
Pulse string frequency processing block
Terminal
Pulse string
input [A]
Terminal
Pulse string
[B]
input
Number of
detected pulses
Pulse string
Terminal
input
[A]
Forward/Rever
Terminal
se rotation
[B]
command
Number of
detected pulses
Terminal
[A]
Terminal
[B]
Number of
detected pulses
Bias
0
100
Input
Lower limit [CA-96]
(0.01%-100.00%)
Positive
(+)
Positive
(+)
Positive
(+)
12-4-6
Inverter Functions
Bias [CA-94]
(-100.00%-100.00%)
Frequency
%
Frequency
×
command
Max. frequency
IM:[Hb105]
SM:[Hd105]
Negative (-)
Negative (-)
Negative (-)
Time
Time
Time