Mitsubishi Electric MELSEC-A/QnA Series Handbook page 234

6
HIGH-SPEED COUNTER MODULE REPLACEMENT
*1 I/O numbers of the modules mounted to the right of the QD62-H02 change, because the number of I/O occupied points for
the AD61S1 are different from the QD62-H02. Set the start I/O number for the module mounted to the right of the
QD62-H02 to the same number for the module before the replacement in the I/O assignment tab of the Q parameter setting
window. The program for the module before the replacement can be used.
*2 The rise/fall time of a pulse affects the counting speed. Countable counting speeds are as follows.
Counting a pulse whose rise/fall time is long may result in a miscount.
• For the AD61S1 and QD62-H02
Rise/fall time
t = 5µs
t = 500µs
6
- 10
1-phase input 2-phase input
10KPPS 7KPPS
500PPS 250PPS
t t