Error Invalid Station Function - Mitsubishi FX3U User Manual

FX -16CCL-M User's Manual
3U
6.4.2

Error invalid station function

This function sets remote station and intelligent device station in which data link is disabled by power OFF,
etc. as error invalid stations so that such stations are not handled as data link faulty stations.
1. Setting method
Set the operation status to the parameter information area "Error invalid station specification (BFM#20)" in the
buffer memory in the master station.
Set the bits corresponding to the station numbers of the stations to be made invalid to ON. However, for a
remote station occupying two or more stations, set to ON only the bit corresponding to the station number set
by the station number (head station number) setting switch in the unit.
The table below shows the buffer memory configuration. (Numbers 1 to 16 indicate station numbers)
BFM No.
Hex. Dec.
#14H #20
2. Setting example
1) System configuration example
When the remote I/O station No. 3 and the intelligent device station No. 7 are made invalid in the system
in which two remote I/O stations, two remote device stations and one intelligent device station are
connected
Master
station
2) Buffer memory setting example
Set to ON the 2nd bit corresponding to the station No. 3 and the 6th bit corresponding to the station No. 7.
(Set "0044H" to the BFM#20.)
BFM No.
Hex. Dec.
#14H #20
Caution
• For errors will not be detected at all in stations set as invalid stations.
• If a remote stations and intelligent device stations set as invalid station is also set as reserved station, the
reserved station function has the priority.
• 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.
• The error invalid station setting cannot be changed while online.
64
b15 b14 b13 b12 b11 b10
16 15 14 13 12 11
Station No. 1
Remote
Station No. 3
device
station
Remote I/O
(occupies
station
2 stations) (occupies
1 station)
b15 b14 b13 b12 b11 b10
0 0 0 0 0
0
b9 b8 b7 b6 b5 b4
10 9 8 7 6 5
Units to be set as error invalid stations
Station No. 4
Remote I/O
station
(occupies
1 station)
b9 b8 b7 b6 b5
0 0 0 0 1 0
0 4
6 Introduction of Functions
6.4 Handy Functions
b3 b2 b1 b0
4 3 2 1
Station No. Station No.
5 7
Remote Intelligent
device device
station station
(occupies (occupies
2 stations) 4 stations)
b4 b3 b2 b1 b0
0 0 1 0 0
4