Assignment Of Counter Input Terminal And Switching Of Function - Mitsubishi FX3G Series Programming Manual

FX /FX /FX /FX
3G 3U 3GC 3UC
Programming Manual - Basic & Applied Instruction Edition
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 of
M8388
high-speed counter
M8392
Function switching
device
M8395
4.8.6

Assignment of counter input terminal and switching of function

When the counters C248, C253 and C254 are combined with the following special auxiliary relays, the allocation of the
input terminals and functions are changed.
In a program, put a special auxiliary relay just before a target counter.
Counter No.
C248(OP)
C253(OP)
C254(OP)
120
Series
Counter No. Monitoring device
C246
C247
C248
C249
C250
C251
C252
C253
C254
C255
Name
Changes the function of high-speed counter.
Switches the function of C248 and C253.
(For details, refer to Subsection 4.8.6.)
Switches the function of C254. (For details, refer to Subsection 4.8.6.)
When using assignment of counter input terminal and
switching of function
M8388
M8392
C248
M8388
M8392
C253
M8388
M8395
C254
4.8 High-Speed Counter [C] (FX3G/FX3GC PLCs)
OFF
M8246
M8247
M8248
M8249
M8250
Up-counting
M8251
M8252
M8253
M8254
M8255
Description
K
K
K
4 Devices in Detail
ON
Down-counting
Description
• Reset input is not provided.
• Reset input is not provided.
• The input count (2-phase 2-count) changes
as follows:
Phase A: Changes from X000 to X006.
Phase B: Changes from X001 to X007.
• Reset input is not provided.
• Start input is not provided.