Changing Input Characteristics; Procedure For Changing Input Characteristics; Changing Of Input Characteristics - Mitsubishi MELSEC-F FX3U Series User Manual

FX /FX Series PLC User's Manual - Analog Control Edition
3U 3UC
FX -4AD (4-channel Analog Input)
3UC
6.

Changing Input Characteristics

For 4AD, the standard input characteristics are provided for each input mode (BFM #0) at the time of factory
shipment.
Changing the offset data (BFM #41 to #44) or the gain data (BFM #51 to #54), however, can change the input
characteristics of each channel. This chapter describes how to change the input characteristics.
6.1

Procedure for Changing Input Characteristics

1
Determine the input mode (BFM #0)
Determine the input mode (BFM #0) optimum for the selected channels and the voltage/current
specifications.
Set value
(HEX)
0
1
2
3
4
5
6
7
8
9 to E
F
Example: Enter "HFF00" in BFM #0 to set input mode 0 for channels 1 and 2 and prevent use channels 3 and
4.
Caution regarding data setting:
• If a value "2", "5", "8" or "F" is set for a channel, the input characteristics of the channel cannot be changed.
• Set the optimum input mode for the analog signal to be input.
2
Determine the input characteristics to be changed.
Determine the digital value to be output according to the input voltage/current.
B-48
Input mode
Voltage input mode
Voltage input mode
Voltage input analog value direct indication
mode
Current input mode
Current input mode
Current input analog value direct indication
mode
Current input mode
Current input mode
Current input analog value direct indication
mode
Not used.
No channels used
6 Changing Input Characteristics
6.1 Procedure for Changing Input Characteristics
Analog input Digital output
range range
-10V to +10V -32000 to +32000
-10V to +10V -4000 to +4000
The offset and the gain cannot be adjusted.
4mA to 20mA 0 to 16000
4mA to 20mA 0 to 4000
The offset and the gain cannot be adjusted.
-20mA to +20mA -16000 to +16000
-20mA to +20mA -4000 to +4000
The offset and the gain cannot be adjusted.
-
-
Resolution
0.32mV
2.50mV
1.25µA
5.00µA
1.25µA
5.00µA
- -
- -