Terminal Layout; Analog Input Line; Special Data Register - Mitsubishi Electric MELSEQ FX3S Series User Manual

FX Series Programmable Controllers
3S
User's Manual - Hardware Edition

11.3.5 Terminal layout

Terminal layout is arranged as follows:
V1+ • • • channel 1 analog input
V2+ • • • channel 2 analog input
V- • • • COM terminal

11.3.6 Analog input line

*1
Class-D grounding
□ □ □
V +, I +, ch :
*1. Use the 2-core shielded twisted pair cable for the analog input lines, and separate the analog input
lines from other power lines or inductive lines.
*2. Make sure to short-circuit the "V+" and "V-" terminals when ch is not used.

11.3.7 Special data register

The following is a list of associated special devices.
Special data register
D8270
D8271
D8272
D8273
D8274
D8275
D8276
D8277
D8278
D8279
1. Input data
The data converted by the PLC will be stored in special data registers.
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.
The special data registers that store the input data are shown in the following table:
Special data register
D8270
D8271
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.
82.7 kΩ
□
V +
V-
*2
□
represents the channel number.
Channel-1 input data
Channel-2 input data
Unused (Do not use.)
Averaging time for channel-1 (Setting range: 1 to 4095)
Averaging time for channel-2 (Setting range: 1 to 4095)
Unused (Do not use.)
Error status
Model code
Channel-1 input data
Channel-2 input data
□
ch
33 kΩ
Description
Description
11 Use of Built-in Analog
11.3 Built-in analog input function
Attribute
R
R
-
-
R/W
R/W
-
-
R
R
103
11
12
13
14
15
16
17
A
B
C