APPENDICES
..
/MELSEC-A
-
knrb.l
-
D9133
D9140
to
-
39141
39172
to
-
I91
73
/O
module
md remota
:erminal
nodule in.
'ormation
Wry
:ounter
Aode
setting
Stored
Data
00:
Absence of re
mote modules
tion disabled
Initial communica
01:
Input module
of
remote terminal
module
10:
Output module
11:
Remote terminal
Number of retries
0:
With automatic
online return
1
:
Without automatic
online return
2:
Communication
stop at online error
3:
Line check
Explanation
Information of
I/O
modules and remote terminal modules connected
tc
Information of
VO
modules and remote terminal modules is for input
the
A2C
is stored corresponding to station number.
output and remote terminal module identification and expressed in
:
bits.
00:
Absence of
VO
modules or remote terminal modules, or initia
01:
Input module or remote terminal module
10:
Output module
11
:
Remote terminal
Data structure
communication is disabled.
b15 b14 b13 b12 bll b10 b9
b8
b7
b6
b5
b4
b3
b2 bl
The number of times
of
retry performed
to
the
VO
module or remotc
terminal module which caused communication error is stored.
(Retry
it
When normal communication is restored, the count number becomes
0.
performed the number
of
times set in
D9174.)
Station numbers of
VO
modules and remote terminal modules are
at
follows.
b15 to
b8
b7 to
bo
~9171
I
Station 62
I
Stetion 61
I
D9172
I
Station
84
I
Station
63
I
The retry counter for one station consists of
8
bits.
bfn+7) bfn+6) Mn+5) bW41 b(n+3) b(n+2) bfni-1) bfn+O)
0/1
I
I
0:
Normal
1: Error
Number
of
times
'
"n" is determined by the station number
of
UO
modules and remote
terminal modules.
1,
3,
5, 7;....*61,
63
odd stations: bO to
b7
(n
=
0)
):
With automatic
online return
i:
Without automatic
online return
4
even stations:
b8
to
b15
(n
=
8)
Rocsuing
Faulty stations
(I/O
modules and remote termin-
al
modules) are disconnected from the link.
Communication with normal stations con-
tinues.
When faulty stations have returned to normal,
communication restarts automatically.
Faulty stations
(I10
modules and rerrlote termin-
al
modules) are disconnected from the link.
Communication with normal stations con-
*
When faulty stations have returned to normal,
tinues.
communication can be resumed by rebooting.
When one
of
VO
modules and remote terminal
!:
Communication
modules has become faulty, communication
with
all
stations stops.
at
online
error
When the faulty station has returned to normal,
1
communication can be resumed by rebooting.
I91 74
Table
3.1
List
of
Special Registers (Continue)
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