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5 Buffer Memory (BFM)
5.4 Buffer Memory Details
A
Common Items
B
FX
3U
-4AD
FX
3UC
-4AD
C
FX
3U
-4AD-ADP
D
FX
3G
-2AD-BD
E
FX
3U
-4DA
F
FX
3U
-4DA-ADP
G
FX
3G
-1DA-BD
H
FX
3U
-3A-ADP
I
FX
3U
-4AD-PT
-ADP
J
FX
3U
-4AD-PTW
-ADP
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX3U-4DA (4-channel Analog Output)
5.4.6 BFM #10 to #13: Offset data/BFM #14 to #17: Gain data
Setting range: See below
Initial value: See below
Numeric data type: Decimal (K)
If the output mode is specified in BFM #0, the initial value of the offset data and gain data of each channel will
be automatically stored.
The initial offset data and the gain data are set for each mode as shown in the following table:
• Offset data: Analog output value when the output data in BFM #1 to #4 are 0 (reference offset value)
• Gain data: Analog output value when the output data in BFM #1 to #4 are the reference gain values (The
reference gain value depends on the set output mode.)
1. Reference offset/gain value and initial value set
2. Offset/gain data change
Set offset data and gain data to change the output characteristics.
The offset and gain data can be set for each channel. If the voltage output mode is set, write the offset and
gain data in mV. If the current output mode is set, write the offset and gain data in μA.
To change the offset or gain data, execute the offset/gain setting value write command (BFM #9).
The setting range is shown in the following table.
*1. The offset and gain values should meet the following conditions:
1000 ≤ Gain value - Offset value ≤ 10000
*2. The offset and gain values should meet the following conditions:
3000 ≤ Gain value - Offset value ≤ 30000
Output mode (BFM #0)
Offset (channels 1 to 4:
BFM #10 to #13)
Gain (channels 1 to 4:
BFM #14 to #17)
Set value Description
Reference
value
Initial value
Reference
value
Initial value
0
Voltage output
(-10 V to +10 V: -32000 to +32000)
0 0mV 16000 5000mV
1
Voltage output Analog value mV
specification mode
(-10 V to +10 V: -10000 to +10000)
0
(Data change
impossible)
0mV
(Data change
impossible)
5000
(Data change
impossible)
5000mV
(Data change
impossible)
2
Current output
(0 mA to 20 mA: 0 to 32000)
00μA 16000 10000μA
3
Current output
(4 mA to 20 mA: 0 to 32000)
04000μA 16000 12000μA
4
Current output Analog value μA
specification mode
(0 mA to 20 mA: 0 to 20000)
0
(Data change
impossible)
0μA
(Data change
impossible)
10000
(Data change
impossible)
10000μA
(Data change
impossible)
Voltage output (mV) Current output (μA)
Offset data
-10000 to +9000
*1
0 to 17000
*2
Gain data
-9000 to +10000
*1
3000 to 30000
*2