Mitsubishi FX3U Series User Manual

7
FX3U Series Programmable Controllers
User's Manual - Hardware Edition
Table of Contents
11. Use of High-speed Counters (C235 to C255) 183
11.1 Outline....................................................................................................................................... 183
11.2 Input Specifications ................................................................................................................... 184
11.2.1 High-speed input special adapter (FX3U-4HSX-ADP)............................................................... 184
11.2.2 Cautions in connecting mating device....................................................................................... 184
11.3 Types of Counting and Operations ........................................................................................... 185
11.3.1 Classification according to counting method .............................................................................185
11.3.2 Types and input signal forms..................................................................................................... 185
11.3.3 High-speed counter device notations ........................................................................................ 185
11.4 List of Device Numbers and Functions ..................................................................................... 186
11.5 Allocation of Device Numbers to Input Numbers ...................................................................... 188
11.5.1 Allocation table .......................................................................................................................... 188
11.5.2 Inhibition of redundant use of input numbers ............................................................................189
11.6 Handling of High-speed Counters ............................................................................................. 190
11.6.1 1-phase 1-count input................................................................................................................ 190
11.6.2 1-phase 2-count input................................................................................................................ 191
11.6.3 2-phase 2-count input................................................................................................................ 192
11.7 Timing of Updating of Current Value and Comparison of Current Value .................................. 193
11.7.1 Timing of updating of current value ........................................................................................... 193
11.7.2 Comparison of current value ..................................................................................................... 193
11.8 Conditions for Hardware Counter to be Handled as Software Counter .................................... 194
11.8.1 Conditions under which counters are handled as software counters ........................................ 194
11.8.2 Method of confirming operation status of counters.................................................................... 194
11.9 Calculation of Response Frequency and Overall Frequency.................................................... 195
11.9.1 Response frequencies of hardware counters............................................................................ 195
11.9.2 Response frequencies and overall frequency of software counters.......................................... 195
11.10 Examples of External Wiring (Rotary Encoder)....................................................................... 198
11.10.1 1-phase 1-input [C235 to C245] .............................................................................................. 198
11.10.2 2-phase 2-input [C251 to C255] .............................................................................................. 199
11.10.3 Cautions for the other side device........................................................................................... 200
11.11 Related Devices and Function Switching Procedures ............................................................ 201
11.11.1 Related devices....................................................................................................................... 201
11.11.2 [Function switching] switching of logic of external reset input signal....................................... 203
11.11.3 [Function switching] switching of allocation and functions of input terminals .......................... 203
11.11.4 [Function switching] procedures for using 2-phase 2-count input counters
C251 to C255 in 4 edge count mode...................................................................................... 204
12. Output Wiring Procedures 205
12.1 Sink and Source Output (Transistor)......................................................................................... 207
12.2 External Wiring for Relay Output............................................................................................... 208
12.2.1 Output specifications (main unit) ............................................................................................... 208
12.2.2 Product life of relay contacts ..................................................................................................... 209
12.2.3 Handling of relay output............................................................................................................. 209
12.2.4 External wiring precautions ....................................................................................................... 210
12.2.5 Example of external wiring ........................................................................................................ 211
12.3 External Wiring of Transistor Output (Sink/Source) Type ......................................................... 212
12.3.1 Output specifications (main unit) transistor output (sink type)................................................... 212
12.3.2 Output specifications (main unit) transistor output (source type) .............................................. 213
12.3.3 Handling of transistor output...................................................................................................... 214
12.3.4 External wiring precautions ....................................................................................................... 216
12.3.5 Example of external wiring ........................................................................................................ 218
12.4 External Wiring for Triac (SSR) Output Type............................................................................ 220
12.4.1 Handling of triac output.............................................................................................................. 220
12.4.2 External wiring precautions ....................................................................................................... 221
12.4.3 Example of external wiring ........................................................................................................ 222

Mitsubishi FX3U Series Specifications

General

Model	FX3U Series
Program Memory	64k steps
Execution Speed	0.065 μs/basic instruction
Type	PLC (Programmable Logic Controller)
Power Supply	100-240V AC
I/O Points	Up to 384
Communication	USB
Expansion	Supported via expansion modules
High-Speed Counters	Up to 6 channels
Analog Input/Output	Available via expansion modules
Temperature Range	0 to 55°C
Programming Language	Ladder Logic, Structured Text
Built-in Functions	PID control
Humidity	5 to 95% (non-condensing)