Mitsubishi FX3UC SERIES User Manual page 163

FX Series Programmable Controllers
3UC
User's Manual - Hardware Edition
Operation status of hardware counter/software counter
Device No.
*1
M8380
M8381 *1
M8382 *1
*1
M8383
Operation status
M8384 *1
M8385 *1
M8386 *1
*1
M8387
*1. Cleared when the PLC mode switches from STOP to RUN.
5.5.5 [Function switching] switching of logic of external reset input signal
The external reset input for the counters C241 to C245, C247 to C250 and C252 to C255 normally resets the
counters when it is turned ON. If the logic is inverted by the following program, the counters are reset by
turning the external reset input to OFF.
Counter No.
C241 to C245
C247 to C250
C252 to C255
Cautions in inverting the logic of the external reset input signal
Although C253 is a hardware counter, it is switched to a software counter by inverting the logic of the external
reset input signal.
Name
Operation status of C235, C241, C244, C246,
C247, C249, C251, C252 or C254
Operation status of C236
Operation status of C237, C242 and C245
Operation status of C238, C248, C248(OP),
C250, C253 or C255
Operation status of C239 or C243
Operation status of C240
Operation status of C244(OP)
Operation status of C245(OP)
Inversion of logic of external reset input
signal
M8388
M8389
C241
K
5 Input Specifications and External wiring
5.5 High-speed Counters (C235 to C255)
Description
Details of change
The logic of external reset input is inverted to
reset the counters when the input is turned OFF.
(The logic for all applicable counter numbers is
inverted.)
ON OFF
Software Hardware
counter counter
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