Related Devices - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
4.7.5

Related devices

1. Devices used to switch the counting direction of 1-phase 1-count input counters
Type
1-phase
1-counting input
2. Devices used to check the counting direction of 1-phase 2-count input counters and
2-phase 2-count input counters
Type
1-phase
2-counting input
2-phase
2-counting input
3. Devices used to switch the high speed counter function
Device No.
Contact for changing function
M8388
of high speed counter
M8389
M8390
M8391
Function switching
M8392
device
M8198
M8199
4. Operation status of hardware counters and software counters
Device No. Name
*1
M8380
*1
M8381
*1
M8382
Operation
*1
M8383
status
*1
M8384
flag
*1
M8385
*1
M8386
*1
M8387
*1. Cleared when the PLC mode switches from STOP to RUN.
Counter No. Specifying device
C235 M8235
C236 M8236
C237 M8237
C238 M8238
C239 M8239
C240 M8240
C241 M8241
C242 M8242
C243 M8243
C244 M8244
C245 M8245
Counter No. Monitoring device
C246 M8246
C247 M8247
C248 M8248
C249 M8249
C250 M8250
C251 M8251
C252 M8252
C253 M8253
C254 M8254
C255 M8255
Name
Changes the function of high speed counter.
Switches the logic of the external reset input.
(For details, refer to Subsection 4.7.6.)
Switches the function of C244. (For details, refer to Subsection 4.7.7.)
Switches the function of C245. (For details, refer to Subsection 4.7.7.)
Switches the function of C248 and C253.
(For details, refer to Subsection 4.7.7.)
Switches the edge count (between 1 and 4) of C251, C252 and C254.
(For details, refer to Subsection 4.7.8.)
Switches the edge count (between 1 and 4) of C253, C255 and C253 (OP).
(For details, refer to Subsection 4.7.8.)
Operation status of C235, C241, C244, C246, C247, C249, C251, C252 or C254
Operation status of C236
Operation status of C237, C242 or 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)
4.7 High Speed Counter [C] (FX3U/FX3UC PLC)
Up-counting Down-counting
OFF
OFF
Up-counting
Description
Description
4 Devices in Detail
ON
ON
Down-counting
ON OFF
Software
Hardware
counter
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