
4
FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instructions Edition
Table of Contents
4.3 Auxiliary Relay [M] ........................................................................................................................75
4.3.1 Numbers of auxiliary relays...........................................................................................................75
4.3.2 Functions and operation examples................................................................................................75
4.4 State Relay [S]..............................................................................................................................77
4.4.1 Numbers of state relays.................................................................................................................77
4.4.2 Functions and operation examples................................................................................................77
4.5 Timer [T]........................................................................................................................................79
4.5.1 Numbers of timers.........................................................................................................................79
4.5.2 Functions and operation examples................................................................................................79
4.5.3 Set value specification method......................................................................................................80
4.5.4 Cautions on routines......................................................................................................................80
4.5.5 Details of timer operation and timer accuracy...............................................................................80
4.5.6 Program examples [off-delay timer and flicker timer]....................................................................81
4.5.7 Handling timers as numeric devices..............................................................................................82
4.6 Counter [C]....................................................................................................................................83
4.6.1 Numbers of counters.....................................................................................................................83
4.6.2 Features of counters......................................................................................................................83
4.6.3 Related devices (to specify counting direction) [32-bit counter]....................................................83
4.6.4 Functions and operation examples................................................................................................84
4.6.5 Set value specification method......................................................................................................85
4.6.6 Response speed of counters.........................................................................................................86
4.6.7 Handling counters as numeric devices..........................................................................................86
4.7 High Speed Counter [C]................................................................................................................88
4.7.1 Types and device numbers of high speed counters......................................................................88
4.7.2 Input assignment for high speed counters.....................................................................................91
4.7.3 Handling of high speed counters...................................................................................................92
4.7.4 Current value update timing and comparison of current value......................................................94
4.7.5 Related devices.............................................................................................................................95
4.7.6 Changing the logic of external reset input signal...........................................................................96
4.7.7 Assignment of counter input terminal and switching of function....................................................96
4.7.8 How to use 2-phase 2-counting input counter C251 to C255 at 4 edge count..............................97
4.7.9 Condition handled as software counters.......................................................................................98
4.7.10 Response frequency of high speed counters..............................................................................99
4.7.11 Cautions on use.........................................................................................................................101
4.8 Data Register and File Register [D] ............................................................................................102
4.8.1 Numbers of data registers and file registers................................................................................102
4.8.2 Structures of data registers and file registers..............................................................................103
4.8.3 Functions and operation examples of data registers...................................................................104
4.8.4 Functions and operation examples of file registers.....................................................................106
4.8.5 Cautions on using file registers...................................................................................................109
4.9 Extension Register [R] and Extension File Register [ER] ...........................................................110
4.9.1 Numbers of extension registers and extension file registers.......................................................110
4.9.2 Data storage destination and access method .............................................................................110
4.9.3 Structures of extension registers and extension file registers.....................................................111
4.9.4 Initialization of extension registers and extension file registers...................................................111
4.9.5 Functions and operation examples of extension registers..........................................................112
4.9.6 Functions and operation examples of extension file registers.....................................................113
4.9.7 Cautions on using extension file registers...................................................................................114
4.9.8 Registration of data of extension registers and extension file registers ......................................115
4.10 Index Register [V and Z] ...........................................................................................................119
4.10.1 Numbers of index registers........................................................................................................119
4.10.2 Functions and structures...........................................................................................................119
4.10.3 Indexing of devices....................................................................................................................120
4.11 Pointer [P and I] ........................................................................................................................121
4.11.1 Numbers of pointers..................................................................................................................121
4.11.2 Functions and operation examples of pointers for branch.........................................................121
4.11.3 Functions and operation examples of pointers for interrupt ......................................................122