Mitsubishi Electric MELSEC FX3U Programming Manual page 112

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
Notation of high speed counter devices
For some high speed counters in FX
special auxiliary relays are used.
Such high speed counter devices are classified below. Note that description as (OP) is not available in
programming.
Standard Device
Numbers
C244
C245
110
and FX
3U 3UC
Switched Device Numbers
C244(OP)
C245(OP)
4.7 High Speed Counter [C] (FX3U/FX3UC PLC)
PLCs, the assignment of input terminals will switch when
Standard Device
Numbers
C248
C253
4 Devices in Detail
Switched Device Numbers
C248(OP)
C253(OP)