Mitsubishi Electric MELSEC L Series Manual page 197

6
HIGH-SPEED COUNTER MODULE REPLACEMENT
(3) Comparison between A1SD62D(-S1) and LD62D
Item
Number of occupied I/O points
Number of channels
Counting speed switch setting
Phase
Count
Signal level
input signal
(A, B)
Counting
speed
(maximum)
Counting
range
Type
Minimum count pulse width, duty ratio: 50%
(500KPPS)
(200KPPS)
Counter
(100KPPS)
(10KPPS)
1-phase
input
(10KPPS)
2-phase
input
A1SD62D(-S1)
32 points
(I/O assignment: special 32
points)
2 channels
200K 10K (200K to
500KPPS)
1-phase input, 2-phase input
EIA Standard RS-422-A differential line driver level
(AM26LS31 [manufactured by Texas Instruments] or equivalent)
1-phase
200KPPS 10KPPS
input
500KPPS
2-phase
200KPPS 7KPPS
input
24-bit unsigned binary
(0 to 16777215)
UP/DOWN preset counter + ring counter function
–
2.5 2.5
(Minimum phase difference in
2-phase input 1.25 s)
–
100
50 50
(Unit : s)
(1-phase input)
142
71 71
(Unit : s)
(2-phase input)
: Compatible,
LD62D
16 points
(I/O assignment: intelligent 16 points)
500K 200K 100K
(100K to (10K to
200KPPS) 100KPPS)
200KPPS 100KPPS
32-bit signed binary
(-2147483648 to 2147483647)
2
1 1
(Unit : s)
(Minimum phase difference in
2-phase input 0.5 s)
5
(Unit : s)
10
5 5
(Unit : s)
(Minimum phase difference in
2-phase input 2.5 s)
100
50 50
(Unit : s)
(Minimum phase difference in
2-phase input 25 s)
: Partial change required, ×: Incompatible
Compati- Precautions for
bility replacement
The number of occupied
I/O points is changed to
16 points.
10K Set the counting speed
(10KPPS of the LD62D with the
or less) switch setting.
10KPPS
Since the LD62D uses
32-bit signed binary
values, sequence
program needs to be
changed.
–
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