Built-In Analog Volume [D8030 And D8031]; Clear Command [M8031 And M8032]; Memory Hold Stop [M8033] (Output Hold In Stop Mode) - Mitsubishi Electric FX3G SERIES Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition

37.2.11 Built-in analog volume [D8030 and D8031]

Values of variable analog potentiometers built in FX
255 in the following special registers in accordance with the scale position.
An obtained numeric value can be specified as the indirectly specified value for a timer to make a variable
potentiometer type analog timer.
• VR1 → D8030 (Integer from 0 to 255)
• VR2 → D8031 (Integer from 0 to 255)
[Basic example]
X003
This register stores the value
(0 to 255) of variable analog
potentiometer.
[Applied example]
M8000
RUN monitor
"D8030 (VR2) value x 2" is transferred to D0 (D1).
X003

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)
Device number
*1
M8031
(non-latch memory
all clear)
M8032
(latch memory all
clear)
*1. When the optional battery is installed in FX
(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
Command
input
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.
864
T10
D8030
0 to 25.5 sec
FNC 22
D8031 K 2
MUL
(0 to 51 sec)
T10 D O
The set value range can be changed (up to 32,767)
by multiplying the register value by "n".
Do not use D1 in other programs.
• 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
• 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)
Outputs are retained even during STOP mode.
M8033
37 Operation of Special Devices (M8000 -, D8000 -)
37.2 Supplement of Special Devices (M8000 - and D8000 -)
PLCs as standard are stored as numeric data ranging from 0 to
3G
"D8030 (VR2) value x 2"
DO (D1)
is transferred to D0 (D1).
Cleared devices
PLCs, general type devices which were changed to the latch
3G