Mitsubishi FX3U-4AD User Manual

B-31
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
-4AD-PT
-ADP
I
FX
3U
-4AD-PTW
-ADP
J
FX
3U
-4AD-PNK
-ADP
FX 3G /FX 3U /FX 3UC PLC User's Manual - Analog Control Edition
FX3U-4AD/FX3UC-4AD (4-channel Analog Input)
5.4.4 BFM #10 to #13: Channel data
Numeric data type: Decimal (K)
Use these buffer memories to store the A/D converted digital values.
The channel data (BFM #10 to #13 for channels 1 to 4) and the data update timing will depend on the set
averaging time (BFM #2 to #5 for channels 1 to 4) or the digital filter setting condition (BFM #6 to #9 for
channels 1 to 4) as shown in the following table.
→ For a detailed description of the averaging time, refer to Subsection 5.4.2.
→ For a detailed description of digital filter functions, refer to Subsection 5.4.3.
*1. "500µs" represents the A/D conversion time.
However, if one of the channels uses the digital filter function, the A/D conversion time will be 5 ms for
all the channels.
Averaging
time
(BFM #2 to #5)
Digital filter
function
(BFM #6 to #9)
Channel data (BFM #10 to #13) update timing
Channel data type Update timing
0 or less
0 (The digital filter
will not be used.)
Immediate data
"0" will be set, and the
averaging time setting error
(b10 of BFM #29) will occur.
Each time the A/D conversion is performed, the
data will be updated.
The update timing will be as follows:
Update time = 500µs
*1
× Number of
selected channels
1
0 (The digital filter
will not be used.)
Immediate data
1 to 1600
(The digital filter
will be used.)
Immediate data
The digital filter function will
be used.
Each time the A/D conversion is performed, the
data will be updated.
The update timing will be as follows:
Update time = 5ms × Number of selected
channels
2 to 400
0 (The digital filter
will not be used.)
Average data
Each time the A/D conversion is performed, the
data will be updated.
The update timing will be as follows:
Update time = 500µs
*1
× Number of
selected channels
401 to 4095 Average data Each time the A/D conversion is performed for
the set averaging time, the data will be updated.
The update timing will be as follows:
Update time = 500µs
*1
× Number of
selected channels × Averaging time
4096 or more
Average data
"4096" will be set, and the
averaging time setting error
(b10 of BFM #29) will occur.

Mitsubishi FX3U-4AD Specifications

General

Brand	Mitsubishi
Model	FX3U-4AD
Category	Controller
Language	English