Mitsubishi Electric FX3G SERIES User Manual

111
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
4 Devices in Detail
4.7 High-Speed Counter [C] (FX3U/FX3UC PLC)
1
Introduction
2
Overview
3
Instruction List
4
Devices in Detail
5
Specified the Device & Constant
6
Before Programming
7
Basic Instruction
8
FNC00-FNC09 Program Flow
9
FNC10-FNC19 Move & Compare
10
FNC20-FNC29 Arith. & Logic Operation
4.7.8 How to use 2-phase 2-count input counters C251 to C255 with
4 edge counting
For the 2-phase 2-count input counters C251 to C255, the edge count is usually set to 1. By using the programs
shown in the table below, the edge count may be set to 4.
Counter No.
When using 2-phase 2-count input counters with 4 edge
counting
Description
C251
1 edge count (before change)
↓
4 edge count (after change)
C252
C253
C253(OP)
C254
C255
M8000
M8198
C251
K {{{
A phase
B phase
+1
+1
Up-counting
A phase
B phase
− 1
− 1
Down-counting
A phase
B phase
+1
Up-counting
+1 +1 +1 +1
+1 +1 +1 +1
A phase
B phase
− 1
Down-counting
− 1 − 1 − 1 − 1
− 1 − 1 − 1 − 1
M8000
M8198
C252
K {{{
M8000
M8199
C253
K {{{
M8388
M8199
C253
K
{{{
M8392
M8000
M8000
M8198
C254
K {{{
M8000
M8199
C255
K {{{

Mitsubishi Electric FX3G SERIES Specifications

General

Model	FX3G SERIES
Input Voltage	100-240 VAC or 24 VDC
Protection Class	IP20
Programming Language	Instruction List
Communication Ports	RS-422, RS-485, USB
Execution Speed	0.21 μs/basic instruction
High-speed Processing	Yes
Analog I/O	Optional (via expansion boards)
Expansion Modules	Yes
Operating Temperature	0°C to 55°C
Type	Programmable Logic Controller (PLC)