Mitsubishi Electronics MELSEC-F Manuel D’Utilisation
E-15
5 Buffer Memory (BFM)
5.1 Assignment of Unit Numbers and Outline of Buffer Memory
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
-4DA (4-channel Analog Output)
5. Buffer Memory (BFM)
This chapter describes the buffer memory incorporated in FX
3U
-4DA.
5.1
Assignment of Unit Numbers and Outline of Buffer Memory
1. Assignment of unit numbers
Unit numbers from 0 to 7 will be assigned to the special function units/blocks starting from the left one.
When the units/blocks are connected to the FX
When the units/blocks are connected to the FX
3UC
-32MT-LT(-2) PLC, unit numbers from 1 to 7 are assigned.
When connected to the FX
3G
/FX
3U
/FX
3UC
(D, DSS) Series
PLC
When connected to the FX
3UC
-32MT-LT(-2) PLC
Main unit
Input/output
extension
block
Special
function block
Special
function block
Input/output
extension
block
Special
function unit
Unit
number: 0
Unit
number: 1
Unit
number: 2
Main unit
(FX
3UC
-32MT
-LT(-2))
Input/output
extension
block
Special
function block
Special
function block
Input/output
extension
block
Special
function unit
Unit number: 0
(Incorporated
CC-Link/LT)
Unit
number: 1
Unit
number: 2
Unit
number: 3