156
FX
3UC
Series Programmable Controllers
User’s Manual - Hardware Edition
5 Input Specifications and External wiring
5.5 High-speed Counters (C235 to C255)
5.5.4
Related Devices (High-speed counter)
For switching 1-phase 1-count input counter mode to up-count or down-count
For monitoring the up-count/down-count counting direction of 1-phase 2-count input and 2-phase
2-count input counters
For switching high-speed counter function
Counter type
Counter No.
Specifying device
Up-counting
Down-counting
1-phase 1-count input
C235
M8235
OFF
ON
C236
M8236
C237
M8237
C238
M8238
C239
M8239
C240
M8240
C241
M8241
C242
M8242
C243
M8243
C244
M8244
C245
M8245
Counter type
Counter No.
Monitoring device
OFF
ON
1-phase 2-count input
C246
M8246
Up-counting
Down-counting
C247
M8247
C248
M8248
C249
M8249
C250
M8250
2-phase 2-count input
C251
M8251
C252
M8252
C253
M8253
C254
M8254
C255
M8255
Device No.
Name
Description
Reference
M8388
Contact for
changing high-
speed counter
function
Changes the function of high-speed counter
−
M8389
Function switching
devices
Switches the logic of the external reset input
Subsection
5.5.5
M8390
Switches the function of C244
Subsection
5.5.6
M8391
Switches the function of C245
Subsection
5.5.6
M8392
Switches the function of C248 and C253
Subsection
5.5.6
M8198
Device for switching C251, C252 and C254 to single or 4 edge
count
Subsection
5.5.7
M8199
Device for switching C253, C255 and C253 (OP) to single or 4 edge
count
Subsection
5.5.7
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