Function Switching] Procedures For Using 2-Phase 2-Count Input Counters C251 To C255 In 4 Edge Count Mode - Mitsubishi FX3U SERIES User Manual

FX Series Programmable Controllers
3U
User's Manual - Hardware Edition
11.11.4 [Function switching] procedures for using 2-phase 2-count input counters C251 to
C255 in 4 edge count mode
The 2-phase 2-count input counters C251 to C255 are in the 1 edge count mode. The counters can be
operated in the 4 edge count mode by programming as shown below.
Counter No.
C251
C252
C253
C253(OP)
C254
C255
204
To use 4 edge count 2-phase 2-input counter
M8000
M8198
C251
M8000
M8198
C252
M8000
M8199
C253
M8000
M8199
M8388
M8392
C253
M8000
M8198
C254
M8000
M8199
C255
11 Use of High-speed Counters (C235 to C255)
11.11 Related Devices and Function Switching Procedures
1 edge count (before change)
K
K
K
4 edge count (after change)
K
K
K
Details of change
Phase A
+1 +1
Phase B
Up-counting
Phase A
-1 -1
Phase B
Down-counting
+1 +1 +1 +1 +1
Phase A
Phase B
+1 +1 +1 +1
Up-counting
-1 -1 -1 -1 -1
Phase A
Phase B
-1 -1 -1 -1
Down-counting