5 - 19
5.1 Basic Concept of Redundant System
5.1.4 System Consistency Check
5
REDUNDANT SYSTEM FUNCTIONS
(2) Operating Status Consistency Check
(a) Check points
The operating status consistency check means checking the CPU module
operating status (RUN / STOP / PAUSE).
(b) Inconsistency Errors
Table5.13 shows inconsistency errors that occur when the operating statuses are
inconsistent.
If the "OPE.MODE DIFF." error occurs in the control and standby systems, or in
the standby system only, adjust the operating status so that they will be consistent
in the followings.
• CPU module RUN/STOP switch position
• GX Developer remote operation
• Remote contact ON/OFF status
Diagram 5.12 Operating Status Consistency Check
Table5.13 Inconsistency Errors
Execution Conditions Error Description
• When both systems are powered ON
simultaneously.
• When both system CPU modules are unreset
(RESET/L.CLR switch is set to the neutral position)
simultaneously.
The following stop error will occur in the
control system and standby system CPU
modules: "OPE.MODE DIFF. (error code:
6020)".
• When one system starts up after the other.
• During normal operation.
• When the separate mode is changed to the backup
mode.
• When reconnecting the tracking cable.
The following continuation error will occur in
the standby system CPU module only:
"OPE.MODE DIFF. (error code: 6010)".
Control system Standby system Control System
System switching allowed
Operating status
is equalized
Tracking cable
System switching
activated
Operating Status RUN Operating Status RUN
Refer Section 5.3 for
system switching
causes
To Next Page
Loading...
