Mitsubishi Electronics MELSEC-F Manuel D’Utilisation
B-41
5 Buffer Memory (BFM)
5.4 Buffer Memory Details
A
Comm
on I
te
te
ms
B
FX
3U
-4AD
FX
3UC
-4
A
D
C
FX
3U
-4A
D
D
-A
D
P
D
FX
3G
-2A
D
D
-BD
E
FX
3U
-4DA
F
FX
3U
-4D
A
A
-AD
P
P
G
FX
3G
-1D
A
A
-BD
H
FX
3U
-3
A-
ADP
I
FX
3U
-4
A
D
-P
T
-
A
D
P
J
FX
3U
-4A
D
D
-P
TW
-
A
A
D
P
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX
3U
-4AD/FX
3UC
-4AD (4-channel Analog Input)
5.4.17 BFM #91 to #94: Abrupt change detection value setting
Setting range: See below.
Initial value: See below.
Numeric data type: Decimal (K)
When channel data (BFM #10 to #13) is updated, if the difference between the previous value and the new
value is larger than the set abrupt change detection value (value set in BFM #91 to #94), the system will judge
that the channel data is changed abruptly.
The result of abrupt change detection will be written to BFM #27 as the abrupt change detection status data.
The abrupt change detection value setting range depends on the set input mode (BFM #0) as shown in the
following table:
value is larger than the set abrupt change detection value (value set in BFM #91 to #94), the system will judge
that the channel data is changed abruptly.
The result of abrupt change detection will be written to BFM #27 as the abrupt change detection status data.
The abrupt change detection value setting range depends on the set input mode (BFM #0) as shown in the
following table:
1. Caution regarding abrupt change detection value setting
To use the abrupt change detection value, be sure to turn on the abrupt change detection function (b2 of BFM
#22).
#22).
Input mode (BFM #0)
Setting range
Initial value
Set
value
Description
0
Voltage input
(-10V
(-10V
to
+10V:-32000
to
+32000)
1
to
32767
3200
1
Voltage input
(-10V
(-10V
to
+10V:-4000
to
+4000)
1
to
4095
400
2
Voltage input
Analog value direct indication mode
(-10V
Analog value direct indication mode
(-10V
to
+10V:-10000
to
+10000)
1
to
10000
1000
3
Current input (4mA
to
20mA:0
to
16000)
1
to
8191
800
4
Current input (4mA
to
20mA:0
to
4000)
1
to
2047
200
5
Current input
Analog value direct indication mode
(4mA
Analog value direct indication mode
(4mA
to
20mA:4000
to
20000)
1
to
8191
800
6
Current input
(-20mA
(-20mA
to
+20mA:-16000
to
+16000)
1
to
16383
1600
7
Current input
(-20mA
(-20mA
to
+20mA:-4000
to
+4000)
1
to
4095
400
8
Current input
Analog value direct indication mode
(-20mA
Analog value direct indication mode
(-20mA
to
+20mA:-20000
to
+20000)
1
to
20000
2000