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APPENDIX
Appendix 2 Difference Between A1SD62, A1SD62E and A1SD62D (S1)
Model name
Function
Counting
Number of I/O occupied
points
Maximum counting speed
CW/CCW pulse input
Linear counter
function
Ring counter
function
Counter
Coincidence
detection function
Overflow detection
function
Maximum and minimum
value settings for the ring
counter function
Utility package support
Fuse broken detection
App.
App - 2
The following table lists the difference between A1SD62, A1SD62E and A1SD62D
(S1).
QD62
D62E
32-bit signed binary counter
(–2147483648 to 2147483647)
16 points
200 kPPS
Function available
Function available
Function available
(Preset and coincidence output function
can be used independently of the ring
counter setting)
Function available
(program interrupt allowed)
Function available
Can be set
Function available
Function available
(Only broken fuses are detected, LED display)
POINT
Programs that were used in earlier products such as A1SD62 (E/D/D-S1) cannot
be used because the I/O signals and the buffer memory configuration of these
products differ from those of QD62 (E/D). The conventional dedicated instructions
cannot be used.
D62D
A1SD62
32-bit unsigned binary counter
(0 to 16777215)
500 kPPS
100 kPPS
Function available
(The ring counter operation only between
the preset value and the coincidence output
point. Setting values cannot be changed
during operation)
Function available
(coincidence detection only)
Function available
(Both broken fuses and external power
off are detected)
MELSEC-Q
A1SD62E
A1SD62D (S1)
32 points
200 kPPS
No function
No function
No function
Cannot be set
No function
App - 2
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