Mitsubishi Electronics MELSEC-F

B-50

6 Changing Input Characteristics

6.1 Procedure for Changing Input Characteristics

/FX

3UC

PLC User's Manual - Analog Control Edition

FX3U-4AD/FX3UC-4AD (4-channel Analog Input)

6. Changing Input Characteristics

For the 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 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

1Determine the input mode (BFM #0)

Determine the optimum input mode (BFM #0) for the selected channels and the voltage/current

specifications.

Example: Enter "HFF00" in BFM #0 to set input mode 0 for channels 1 and 2 and prevent use channels 3 and

Caution regarding data setting:

• If a channel is set to the value "2", "5", "8" or "F", the input characteristics of the channel cannot be

changed.

• Set the optimum input mode for the analog signal to be input.

Set value

(HEX) Input mode Analog input range Digital output range

0Voltage input mode -10V to +10V -32000 to +32000

1Voltage input mode -10V to +10V -4000 to +4000

2Voltage input analog value direct indication

mode The offset and the gain cannot be adjusted.

3Current input mode 4mA to 20mA 0 to 16000

4Current input mode 4mA to 20mA 0 to 4000

5Current input analog value direct indication

mode The offset and the gain cannot be adjusted.

6Current input mode -20mA to +20mA -16000 to +16000

7Current input mode -20mA to +20mA -4000 to +4000

8Current input analog value direct indication

mode The offset and the gain cannot be adjusted.

9 to E Not used. - -

FChannel not used - -