919
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
37 Operation of Special Devices (M8000 -, D8000 -)
37.2 Supplement of Special Devices (M8000 - and D8000 -)
31
FNC275-FNC279
Data
Transfer 3
32
FNC280-FNC289
High Speed
Processing 2
33
FNC290-FNC299
Extension File
Register
34
FNC300-FNC305
FX
3U
-CF-ADP
35
SFC•STL
Programming
36
Interrupt
Function
37
Special Device
38
Error Code
A
Version Up
Information
B
Execution Times
37.2.12 Clear command [M8031 and M8032]
For all devices (image memory) in the PLC, the latch (battery backed) areas and non-latch areas can be
cleared.
M8031 (non-latch memory all clear), M8032 (latch memory all clear)
*1. When the optional battery is installed in FX
3G PLCs, general type devices which were changed to the
latch (battery backed) type are handled as devices in latch areas.
37.2.13 Memory hold stop [M8033] (output hold in STOP mode)
When the special auxiliary relay M8033 is turned ON, the output status in the RUN mode is retained even if
the PLC status switches from RUN to STOP.
1. Example program
For example, when a heater is driven by the PLC, the PLC can be stopped while the heater and other
equipment are kept driven, and then the PLC can be started again after program changes.
37.2.14 All outputs disable [M8034]
When M8034 is turned ON, the output memory is cleared. As a result, all actual output relay contacts are
turned OFF and the PLC is operated in the image memory.
1. Program example
Device number Cleared devices
M8031
*1
(non-latch memory
all clear)
• Contact image of output relay (Y), general type auxiliary relay (M), and general type state relay (S)
• Contact and coil of timer (T)
• Contact, counting coil, and reset coil of general type counter (C)
• Present value of general type data register (D)
• Present value register of timer (T)
• Present value register of general type counter (C)
• Extension register for general
M8032
(latch memory all
clear)
• Contact image of latch (battery backed) type auxiliary relay (M) and latch (battery backed) type
state relay (S)
• Contact and coil of retentive type timer (T)
• Contact, counting coil, and reset coil of latch (battery backed) type counter and high speed
counter
• Present value of latch (battery backed) type data register (D)
• Present value register of retentive type timer (T) and 1-ms timer (T)
• Present value register of latch (battery backed) type counter and high speed counter
• Latch (battery backed) type extension register (R)
M8033
Outputs are retained even during STOP mode.
Command
input
M8034
All outputs are disabled (image RUN status).
Command
input
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