Switching Of Input Mode; Input Data - Mitsubishi Electric MELSEC-FX3S Series Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
FX -2AD-BD (2-channel Analog Input)
3G
4.3

Switching of Input Mode

Turn the special auxiliary relay on/off to switch the input mode of 2AD-BD between the current input mode
and the voltage input mode. To switch the input mode, use the following special auxiliary relays:
• FX Series PLC
3S
Special auxiliary relay
M8260
M8261
• FX Series PLC
3G
Special auxiliary relay
Board A
M8260
M8261
1. Program Example (For FX
To switch the channel input mode, create a sequence program as follows:
1) To switch the input mode of channel 1
of the board A to the voltage input mode:
M8001
Normally OFF
4.4

Input Data

The data converted by the 2AD-BD will be stored in the special data registers.
The special data registers that store the input data are shown in the following table:
• FX Series PLC
3S
Special data register
D8260
D8261
• FX Series PLC
3G
Special data register
Board A
D8260
D8261
The converted A/D immediate data or averaged data (data average conforming to the specified averaging
time) will be stored in the above data registers as the input data.
1. Caution regarding input data
Input data is for reading only.
Do not change (rewrite) the input data using sequence program, indicator, or device monitor of the
programming tool.
2. Program Example (For FX
M8000
Normally
ON
Even if the input data is not stored in D100 or D101, data registers D8260 or D8261 can be directly used in
the timer/counter set value or in a PID instruction.
PLC User's Manual - Analog Control Edition
Switches the input mode of channel 1 OFF: Voltage input
Switches the input mode of channel 2
Board B
M8270 Switches the input mode of channel 1 OFF: Voltage input
M8271 Switches the input mode of channel 2
Series PLC)
3G
M8260
Stores the channel-1 input data
Stores the channel-2 input data
Board B
D8270 Stores the channel-1 input data
D8271 Stores the channel-2 input data
→ For a detailed description of the averaging time, refer to Section 4.5.
Series PLC)
3G
FNC 12
D8260
MOV
FNC 12
D8261
MOV
Description
ON: Current input
Description
ON: Current input
2) To switch the input mode of channel 2
of the board A to the current input mode:
M8000
Normally ON
Description
Description
Stores the channel-1 input data
D100
of the board A in the D100.
Stores the channel-2 input data
D101
of the board A in the D101.
4 Programming
4.3 Switching of Input Mode
M8261
Numeric data type: Decimal (K)
D-17
A
B
C
D
E
F
G
H
I
J