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• If the bus cable between the slave station 05
03
02
(8)
(8)
State of an individual communication flag
D
7
6
5
OFF
Remove the connector on point
A, and turn ON the termination
resistance of the master station.
Connect the A connector, and
then remove the connector on
point B.
8
Remove the connector on point
C and make sure the B
connector is not connected.
Connect the C connector and
make sure the B connector is
not connected, and remove the
connector at the next point to
the point D.
Disconnection in the bus cable and the
branch cable between the station 05
06
, or contact failure of the connectors
(8)
Error on the slave station 06
Master
01
04
(8)
(8)
station
B
D
4
3
2
1
0
Unstable
OFF
As the communication possible stations
03
(8)
state of communication monitoring flag is
as follows.
D
7
OFF
There is no normal station amoung
commiunicatable station 05, 06, 07
and 05
D
7
OFF
As the communication possible station
05
(8)
ahead of the point C.
D
7
OFF
The station 05
communication possible stations, but the
station 05
06
(8)
states occur between the point C and the
point D.
D
7
OFF
Cause
and
(8)
(8)
and 06
is disconnected in the following system.
(8)
(8)
05
06
(8)
(8)
A
C
D
Disconnection
, 02
, 01
, and 04
are normal, the
(8)
(8)
(8)
D
6
5
4
3
2
1
0
ON
OFF
is unstable.
(8)
D
6
5
4
3
2
1
0
Unstable
OFF
is normal, abnormal points exists
D
6
5
4
3
2
1
0
ON
OFF
and 06
become
(8)
(8)
is unstable and the station
(8)
is turned to OFF, so the abnormal
D
6
5
4
3
2
1
0
Unstable
OFF
Countermeasure
Remove both the bus cable and
the branch cable connectors. After
that, shorten one of these
connectors and check conductivity
using a tester.
Exchange the slave module.
8
56
·
07
(8)
,
(8)
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