APPENDICES
Appendix 1 Precautions for Accessing Redundant CPU System
App
- 2
9
DEVICE MONIT
O
R
UT
IL
ITY
10
MELS
EC D
A
TA
LI
N
K
LI
BRAR
Y
11
PROGRAMMING
12
AP
PLI
C
A
T
IO
N
FUNCT
IONS
13
E
R
ROR COD
E
S
14
TROU
BL
E
S
H
O
O
T
ING
A
A
P
PENDICES
I
INDEX
(2) Operation at occurrence of system switching
When system switching occurs during access to the Redundant CPU, access to the
Redundant CPU set for the Logical station No. is continued.
(Example) When the following Logical station No.66 was specified for access
Logical station No.66
Network No.:
1
Station No.:
1
Multiple PLC:
Not specified
Redundant PLC:
Control system
Before system switching
After system switching
MELSECNET/H
(Network No.1)
MELSECNET/H module
Control system
Standby system
Tracking cable
CC-Link IE Controller Network module
Station No.1
Station No.3
Station No.4
Station No.5
Station No.2
CC-Link IE Controller Network
(Network No.2)
MELSECNET/H
(Network No.1)
MELSECNET/H module
Tracking cable
CC-Link IE Controller Network module
CC-Link IE Controller Network
(Network No.2)
Station No.1
Station No.3
Station No.4
Station No.5
Station No.2
Control system
Standby system
Control system
Standby system
