B-21
5 Buffer Memory (BFM)
5.3 List of Buffer Memories (BFM)
A
Common Items
B
FX
3UC
-4AD
C
FX
3U
-4AD-ADP
D
FX
3U
-4DA-ADP
E
FX
3U
-4AD-PT
-ADP
F
FX
3U
-4AD-TC
-ADP
G
PID Instruction
(FNC 88)
FX
3U
/FX
3UC
Series PLC User's Manual - Analog Control Edition
FX3UC-4AD (4-channel Analog Input)
5.3 List of Buffer Memories (BFM)
4AD incorporates the following buffer memories.
→ For a detailed description of buffer memories, refer to Section 5.4 and subsequent sections.
*1. If power failure occurs, the EEPROM will retain the data.
*2. To specify the input mode of each channel, set each digit using hexadecimal numbers 0 to 8 and F.
*3. Use b0 to b3.
BFM number Description Setting range Initial value Data type Reference
#0
*1
Input mode setting for channels 1 thorough 4 *2 H0000 at delivery
Hexadeci-
mal
Subsection
5.4.1
#1 Not used - - - -
#2
Number of averaging time for channel 1
(Unit: times)
1 to 4095 K1 Decimal
Subsection
5.4.2
#3
Number of averaging time for channel 2
(Unit: times)
1 to 4095 K1 Decimal
#4
Number of averaging time for channel 3
(Unit: times)
1 to 4095 K1 Decimal
#5
Number of averaging time for channel 4
(Unit: times)
1 to 4095 K1 Decimal
#6 Channel-1 digital filter setting 0 to 1600 K0 Decimal
Subsection
5.4.3
#7 Channel-2 digital filter setting 0 to 1600 K0 Decimal
#8 Channel-3 digital filter setting 0 to 1600 K0 Decimal
#9 Channel-4 digital filter setting 0 to 1600 K0 Decimal
#10
Channel-1 data
(immediate data or average data)
--Decimal
Subsection
5.4.4
#11
Channel-2 data
(immediate data or average data)
--Decimal
#12
Channel-3 data
(immediate data or average data)
--Decimal
#13
Channel-4 data
(immediate data or average data)
--Decimal
#14 to #18 Not used - - - -
#19
*1
Data change prohibit
Setting of the following buffer memories is
prohibited:
• Input mode specification (BFM #0)
• Initialization function (BFM #20)
• Input characteristics writing (BFM #21)
• Convenient functions (BFM #22)
• Offset data (BFM #41 to #44)
• Gain data (BFM #51 to #54)
• Automatic transfer-to data register
specification (BFM #125 to #129)
• Data history sampling time setting (BFM #198)
To permit data
change: K2080
To inhibit data
change: Value
other than K2080
K2080 at delivery Decimal
Subsection
5.4.5
#20
Initialization function:
Set "K1" in this buffer memory to perform
initialization. At the completion of initialization,
"K0" will be automatically set.
K0 or K1 K0 Decimal
Subsection
5.4.6
#21
Input characteristics writing:
Write the offset/gain value as the input
characteristics. At the completion of writing,
"H0000" (b0 to b3: OFF) will be automatically
set.
*3 H0000
Hexadeci-
mal
Subsection
5.4.7
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