YASKAWA VIPA System MICRO M13-CCF0000 Manual page 110

Deployment I/O periphery
Counting > Counter operating modes
5.6.5.3.3 Main counting direction backward
110
Main counting direction backward
n The counter counts backward starting with the load value.
n When the counter reaches the end value +1 in positive direction, it jumps to the load
value at the next negative count pulse and continues counting. If enabled additionally
a hardware interrupt is triggered.
n You may exceed the upper count limit.
Limits
End value
Upper count limit
Valid range of values
-2 147 483 648 (-2 31 )
up to +2 147 483 646 (2
+2 147 483 647 (2 31 -1)
HB400 | CPU | M13-CCF0000 | en | 16-47
VIPA System MICRO
31 -2)