5
REDUNDANT SYSTEM FUNCTIONS
5.10 Redundant CPU Functions Restricted in Redundant System
5.10.1 Enforced ON/OFF of external I/O
5 - 128
1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
TRACKING CABLE
4
PROCEDURE FOR
STARTING UP A
REDUNDANT SYSTEM
5
REDUNDANT SYSTEM
FUNCTIONS
6
REDUNDANT SYSTEM
NETWORKS
7
PROGRAMMING
CAUTIONS
8
TROUBLESHOOTING
(2) Tracking of Registered Forced ON/OFF Information from Control System
to Standby System
The forced ON/OFF information registered in the control system CPU module is
tracked to the standby system CPU module.
(Track the registered forced ON/OFF information from the control system CPU
module to the standby system CPU module in the "backup mode" or "separate
mode".)
Hence, if system switching occurs, the external I/O forced ON/OFF can be continued
according to the forced ON/OFF information registered by GX Developer before
system switching.
(3) Operation of Input/Output of which forced ON/OFF information has been
registered at Operation Mode Change
If the operation mode is changed, the forced ON/OFF information before operation
mode change remains.
Hence, if the operation mode is changed, the external I/O forced ON/OFF can be
continued according to the forced ON/OFF information before operation mode
change.
If the operation mode is in the separate mode, the external I/O forced ON/OFF by GX
Developer can be executed for only the control system CPU module.
If in the separate mode, the external I/O forced ON/OFF registration cannot be
executed individually for the control system and standby system CPU modules.
Diagram 5.97 Input/Output by Forced ON/OFF of External I/O at System Switching Occurrence
GX Developer GX Developer
Remote I/O station
GX Developer
Remote I/O station
Control system
Standby system
Tracking cable
MELECNET/H remote I/O network
Input by forced ON/OFF of external I/O
System switching
X100
Output by forced ON/OFF of external I/O
Y120:ON
Y121:ON
Forced ON/OFF information tracked
from control system CPU module
Registration of forced ON/OFF
X100:ON, Y120:ON, Y121:ON
New control system
New standby system
Tracking cable
MELECNET/H remote I/O network
Input by forced ON/OFF of external I/O
X100
Output by forced ON/OFF of external I/O
Y120:ON
Y121:ON
Forced ON/OFF information tracked
from control system CPU module
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