Mitsubishi Electric MELSEC FX3U - Built-In Analog Volume [D8030 and D8031]

918
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 -)
4. Cautions for communication setting devices (D8120, D8121 and D8129)
Special data registers D8120 (communication format), D8121 (station number setting) and D8129 (timeout
check time) are backed up by the battery in FX
3U/FX3UC PLCs.
When performing the batteryless operation in FX
3U/FX3UC PLCs, reset these special data registers using the
procedure described above, and then transfer proper set values to them using a program.
The communication conditions can be set in the parameter settings.
When the communication conditions are set in the parameter settings, the PLC transfers the parameter
values to the above special data registers before operation. Thus it is recommended to set the
communication conditions via the parameter settings.
37.2.11 Built-in analog volume [D8030 and D8031]
Values of variable analog potentiometers built in FX3G PLCs as standard are stored as numeric data in the
range from 0 to 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)
M8000
FNC 22
MUL
D8031 K 2 DO (D1)
X003
T10 D O
[Applied example]
"D8030 (VR2) value x 2"
is transferred to D0 (D1).
"D8030 (VR2) value x 2" is transferred to D0 (D1).
The set value range can be changed (up to 32,767)
by multiplying the register value by "n".
(0 to 51 sec)
Do not use D1 in other programs.
RUN monitor
X003
T10
D8030
[Basic example]
0 to 25.5 se
c
This register stores the value
(0 to 255) of variable analog
potentiometer.