6 Introduction of Functions
6.4 Handy Functions
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FX3U-16CCL-M User's Manual
1
Introduction
2
Specification
3
System
Configuration
4
Installation
5
Wiring
6
Introduction of
Functions
7
Data Link
Processing
Time
8
Parameter
Setting
9
Data Link
Procedure
10
Buffer Memory
6.4 Handy Functions
6.4.1 Reserved station function
This function sets remote stations and intelligent device station to be connected in the future (which are not
currently connected) as reserved ones so that such stations are not handled as data link faulty stations.
1. Setting method
Set the operation status to the parameter information area "Reserved station specification (BFM#16)" in the
buffer memory in the master station.
Set to ON the bits corresponding to the station numbers of the stations to be reserved.
The table below shows the buffer memory configuration. (Numbers 1 to 16 indicate station numbers)
2. Setting example
1) System configuration example
When one remote I/O station and two remote device stations are to be connected in the future to the
system in which one intelligent device station and one remote I/O station are connected
2) Buffer memory setting example
Set to ON the 3rd bit corresponding to the station No. 4 and the 9th bit corresponding to the station No.
10. (Set "0208H" to the BFM#16.)
Caution
• When a connected remote station or intelligent device station is set as a reserved station, the station
cannot execute any data link at all.
• For a remote station or intelligent device station which occupies 2 or more stations, turn on only the bit for
the station number set by the unit's station number setting switch.
BFM No.
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
Hex. Dec.
#10H #16 16151413121110 9 8 7 6 5 4 3 2 1
BFM No.
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
Hex. Dec.
#10H #16 0000001000001000
0208
Master
station
Station No. 1
Remote I/O
station
(occupies
1 station)
Station No. 3
Intelligent
device
station
(occupies
4 stations)
Station No. 4
Remote
device
station
(occupies
2 stations)
Station No. 8
Station No. 10
Units to be connected in the future
Remote I/O
station
(occupies
1 station)
Remote
device
station
(occupies
2 stations)
(Reserved
Station)
(Reserved
Statio)