Mitsubishi Electric MELSEC L Series Manual page 199

6
HIGH-SPEED COUNTER MODULE REPLACEMENT
(4) Comparison between A1SD62D(-S1) and LCPU(Built-in I/O function)
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%
(200KPPS)
Counter
(10KPPS)
1-phase
input
(10KPPS)
2-phase
input
A1SD62D(-S1)
32 points
(I/O assignment: special 32 points)
2 channels
200K 10K
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
2-phase
200KPPS 7KPPS
input
24-bit unsigned binary
(0 to 16777215)
UP/DOWN preset counter + ring counter function
5
2.5 2.5
(Unit : s)
(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,
LCPU (built-in I/O function)
16 points
(I/O assignment: intelligent 16 points)
200K 100K 10K
(100K to (10K to (10KPPS
200KPPS) 100KPPS) or less)
DC input: 24V, 6.0mA
Differential input: The EIA Standard
RS-422-A differential line driver can
be connected.
200KPPS 100KPPS 10KPPS
200KPPS 100KPPS 10KPPS
32-bit signed binary
(-2147483648 to 2147483647)
1-phase: 5µs
2-phase: 10µs
: Partial change required, ×: Incompatible
Compati-
Precautions for replacement
bility
The number of occupied I/O
points is changed to 16 points.
200KPPS
(1-phase multiple of 2, 2-phase
multiple of 4)
Since the LCPU (built-in I/O
function) uses 32-bit signed
binary values, sequence
program needs to be changed.
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