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B-20
5 Buffer Memory (BFM)
5.1 Assignment of Unit Numbers and Outline of Buffer Memory
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX3U-4AD/FX3UC-4AD (4-channel Analog Input)
5. Buffer Memory (BFM)
This chapter describes the buffer memory incorporated in 4AD.
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.
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/FX3U/FX3UC (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