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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
2 Overview (Sequence Program)
2.6 Program Memory and Devices
3) Types of bit device memory
a) FX
3U/FX3UC PLC
*1. Some devices are cleared when the PLC status switches from STOP to RUN.
→ For special auxiliary relay names and definitions, refer to Chapter 37.
Item Power OFF
Power
OFF→ON
STOP→RUN RUN→STOP
Contact image
memory
(X, Y, M, S)
Input relay (X) Cleared.
Does not
change.
Cleared.
Does not change while M8033 is
ON.
Output relay (Y) Cleared.
Does not
change.
Cleared.
Does not change while M8033 is
ON.
General type auxiliary relay (M) Cleared.
Does not
change.
Cleared.
Does not change while M8033 is
ON.
Latched (battery backed) type
auxiliary relay (M)
Does not change.
Special type auxiliary
relay (M)
Cleared.
Set to initial val-
ues.
*1
Does not change.
*1
General type state relay (S) Does not change.
Latched (battery backed) type
state relay (S)
Does not change.
Annunciator (S) Does not change.
Timer contact
Time counting coil
(T)
For 100 ms Cleared.
Does not
change.
Cleared.
Does not change while M8033 is
ON.
For 10 ms Cleared.
Does not
change.
Cleared.
Does not change while M8033 is
ON.
Retentive type for
100 ms
Does not change.
Retentive type for 1 ms Does not change.
Counter contact
Counting coil
Reset coil (C)
General type Cleared.
Does not
change.
Cleared.
Does not change while M8033 is
ON.
Latched (battery backed) type Cleared.
Does not
change.
Cleared.
Does not change while M8033 is
ON.
High speed type Cleared.
Does not
change.
Cleared.
Does not change while M8033 is
ON.