4
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instructions Edition
Table of Contents
4.4.1 Numbers of state relays................................................................................................................. 94
4.4.2 Functions and operation examples................................................................................................ 95
4.5.1 Numbers of timers ......................................................................................................................... 97
4.5.2 Functions and operation examples................................................................................................ 98
4.5.3 Set value specification method...................................................................................................... 99
4.5.4 Cautions on routines...................................................................................................................... 99
4.5.5 Details of timer operation and timer accuracy ............................................................................. 100
4.5.6 Program examples [off-delay timer and flicker timer] .................................................................. 100
4.5.7 Handling timers as numeric devices............................................................................................ 102
4.6.1 Numbers of counters ................................................................................................................... 103
4.6.2 Features of counters.................................................................................................................... 103
4.6.3 Related devices (to specify counting direction) [32-bit counter] .................................................. 104
4.6.4 Functions and operation examples.............................................................................................. 104
4.6.5 Set value specification method.................................................................................................... 106
4.6.6 Response speed of counters....................................................................................................... 106
4.6.7 Handling counters as numeric devices........................................................................................ 107
4.7 High Speed Counter [C] (FX
PLC).............................................................................. 108
4.7.1 Types and device numbers of high speed counters .................................................................... 108
4.7.2 Input assignment for high speed counters................................................................................... 111
4.7.3 Handling of high speed counters ................................................................................................. 112
4.7.4 Current value update timing and comparison of current value .................................................... 114
4.7.5 Related devices ........................................................................................................................... 115
4.7.6 Changing the logic of external reset input signal......................................................................... 116
4.7.7 Assignment of counter input terminal and switching of function.................................................. 116
4.7.8 How to use 2-phase 2-count input counters C251 to C255 with 4 edge counting....................... 117
4.7.9 Conditions for hardware counters to be handled as software counters....................................... 118
4.7.10 Response frequency of high speed counters ............................................................................ 119
4.7.11 Cautions on use......................................................................................................................... 121
4.8 High Speed Counter [C] (FX
PLCs)........................................................................................ 123
4.8.1 Types and device numbers of high speed counters .................................................................... 123
4.8.2 Input assignment for high speed counters................................................................................... 125
4.8.3 Handling of high speed counters ................................................................................................. 126
4.8.4 Current value update timing and comparison of current value .................................................... 126
4.8.5 Related devices ........................................................................................................................... 126
4.8.6 Assignment of counter input terminal and switching of function.................................................. 127
4.8.7 Response frequency of high speed counters .............................................................................. 128
4.8.8 Cautions on use........................................................................................................................... 129
4.9.1 Numbers of data registers and file registers................................................................................ 131
4.9.2 Structures of data registers and file registers .............................................................................. 132
4.9.3 Functions and operation examples of data registers................................................................... 133
4.9.4 Functions and operation examples of file registers ..................................................................... 135
4.9.5 Cautions on using file registers ................................................................................................... 138
4.10.1 Numbers of extension registers and extension file registers ..................................................... 139
4.10.2 Data storage destination and access method ........................................................................... 139
4.10.3 Structures of extension registers and extension file registers ................................................... 140
4.10.4 Initialization of extension registers and extension file registers................................................. 140
4.10.5 Functions and operation examples of extension registers ........................................................ 141
4.10.6 Functions and operation examples of extension file registers................................................... 142
4.10.7 Cautions on using extension file registers ................................................................................. 145
4.10.8 Registration of data in extension registers and extension file registers..................................... 146
4.11.1 Numbers of index registers........................................................................................................ 150
4.11.2 Functions and structures ........................................................................................................... 150
4.11.3 Indexing of devices.................................................................................................................... 151
4.12.1 Numbers of pointers .................................................................................................................. 152
4.12.2 Functions and operation examples of pointers for branch......................................................... 153
4.12.3 Functions and operation examples of pointers for interrupt ...................................................... 154
