Mitsubishi FX3U Series User Manual

204
FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
11 Use of High-speed Counters (C235 to C255)
11.11 Related Devices and Function Switching Procedures
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. To use 4 edge count 2-phase 2-input counter Details of change
C251
1 edge count (before change)

4 edge count (after change)
C252
C253
C253(OP)
C254
C255
M8000
M8198
C251
K
Phase A
Phase B
+1
+1
Up-counting
Phase A
Phase B
-1
-1
Down-counting
Phase A
Phase B
+1
Up-counting
+1 +1 +1 +1
+1 +1 +1 +1
Phase A
Phase B
-1
Down-counting
-1 -1 -1 -1
-1 -1 -1 -1
M8000
M8198
C252
K
M8000
M8199
C253
K
M8000
M8199
C253
M8392
M8388
K
M8000
M8198
C254
K
M8000
M8199
C255
K

Mitsubishi FX3U Series Specifications

General

Brand	Mitsubishi
Model	FX3U Series
Category	Controller
Language	English