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5 Buffer Memory (BFM)

FX

3G

/FX

3U

/FX

3UC

 PLC User's Manual - Analog Control Edition

FX

3U

-4DA (4-channel Analog Output)

FX

3U

-4DA incorporates the following buffer memories.
→ For a detailed description of the buffer memory, refer to Section 5.4 and subsequent sections.

*1.

If power failure occurs, the EEPROM will retain the data.

*2.

Specify the output mode of each channel setting one of hex code 0 to 4 and F in each digit.

*3.

Specify the data to be output from each channel upon PLC stop setting one of hex code 0 to 2 in each
digit.

*4.

Use b0 to b3.

#0

*1

Output mode setting for channels 1 to 4

*2

H0000 at delivery

Hexadeci-

mal

Subsection 

5.4.1

#1

Channel 1 output data

Depending on the 

mode used

K0

Decimal

Subsection 

5.4.2

#2

Channel 2 output data

K0

Decimal

#3

Channel 3 output data

K0

Decimal

#4

Channel 4 output data

K0

Decimal

#5

*1

Output setting upon PLC stop

*3

H0000

Hexadeci-

mal

Subsection 

5.4.3

#6

Output status

-

H0000

Hexadeci-

mal

Subsection 

5.4.4

#7, #8

Not used

-

-

-

-

#9

Command to write offset/gain setting value of 
channels 1 to 4

*4

H0000

Hexadeci-

mal

Subsection 

5.4.5

#10

*1

Channel-1 offset data (Unit: mV or 

μA)

Depending on the 

mode used

Depending on 

the mode used

Decimal

Subsection 

5.4.6

#11

*1

Channel-2 offset data (Unit: mV or 

μA)

Decimal

#12

*1

Channel-3 offset data (Unit: mV or 

μA)

Decimal

#13

*1

Channel-4 offset data (Unit: mV or 

μA)

Decimal

#14

*1

Channel-1 gain data (Unit: mV or 

μA)

Depending on the 

mode used

Depending on 

the mode used

Decimal

Subsection 

5.4.6

#15

*1

Channel-2 gain data (Unit: mV or 

μA)

Decimal

#16

*1

Channel-3 gain data (Unit: mV or 

μA)

Decimal

#17

*1

Channel-4 gain data (Unit: mV or 

μA)

Decimal

#18

Not used

-

-

-

-

#19

*1

Setting change prohibition

To permit data 

change: K3030

To disable data 

change: Value 

other than K3030

K3030 at delivery

Decimal

Subsection 

5.4.7

#20

Initialization function:
Set "K1" in this buffer memory to perform 
initialization. At the completion of initialization, 
the "K0" will be automatically set.

K0 or K1

K0

Decimal

Subsection 

5.4.8

#21 to #27

Not used

-

-

-

-

#28

Disconnection detection status (Valid only in 
current mode selection)

-

H0000

Hexadeci-

mal

Subsection 

5.4.9

#29

Error status

-

H0000

Hexadeci-

mal

Subsection 

5.4.10

#30

Model code K3030

-

K3030

Decimal

Subsection 

5.4.11

#31

Not used

-

-

-

-