489
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
16 External FX Device – FNC 80 to FNC 89
16.6 FNC 85 - VRRD / Volume Read
11
FNC30-FNC39
Rotation and
Shift
12
FNC40-FNC49
Data Operation
13
FNC50-FNC59
High Speed
Processing
14
FMC60-FNC69
Handy
Instruction
15
FNC70-FNC79
External FX I/O
Device
16
FNC80-FNC89
External FX
Device
17
FNC100-FNC109
Data
Transfer 2
18
FNC110-FNC139
Floating Point
19
FNC140-FNC149
Data
Operation 2
20
FNC150-FNC159
Positioning
Control
2. Example in which the analog values of the variable analog potentiometers Nos. 0 to 7 are
read in turn, and used as analog timers
K0 to K7 are specified in of the VRRD instruction in accordance with the values of the variable
potentiometers VR0 to VR7.
Index (Z = 0 to 7) is used for indexing in the sequence below, and K0Z indicates K0 to K7.
Cautions
• In 14-point and 24-point type FX3G PLCs, the variable analog potentiometer board can be connected to the
option connector 1, and occupies the communication channel ch1.
In this case, the communication function using the communication channel ch1 is not available when the
VRRD or VRSC instruction is used.
• In 40-point and 60-point type FX
3G PLCs, the variable analog potentiometer board can be connected only
to the option connector 2, and occupies the communication channel ch2.
In this case, the communication function using the communication channel ch2 is not available when the
VRRD or VRSC instruction is used.
→ For details, refer to the Communication Control Edition manual.
S
1
S
M8000
RST Z
FNC 08
FOR
K8
FNC 85
VRRD
K0Z D200Z
Z
M8000
FNC 24
INC
FNC 09
NEXT
RUN
monitor
X000
T0
D200
T0
Y000
X001
T1
D201
T1
Y001
X007
T7
D207
T7
Y007
Because T0 to T7 are 100
ms timers, 0 to 25.5 sec are
obtained from the set values
0 to 255.
The index register Z is reset.
The routine "FOR ~ NEXT" is repeated 8 times.
Z + 1
→
Z
Analog values of variable
potentiometers are stored in data
registers D200 to D207.
0
4
7
16
17
21
23
27
59
63
Analog timer of VR0
Analog timer of VR1
Analog timer of VR7
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