Mitsubishi Electric MELSEC iQ-R-R00CPU - When One System Is Started Automatically Even Though a Tracking Communication Error Has Occurred

26 BASIC CONCEPT
26.7 Determination of Control System/Standby System
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26
When one system is started automatically even though a tracking
communication error has occurred
When the other system is powered off or a tracking cable has an error at a system start, the CPU module waits for the start-up
of the other system. The following shows a program example to start up only one of the systems using external signals
without waiting for the start-up of the other system. In the following example, the program prevents both systems from
operating as control systems.
• This program example is not supported with the redundant line structure of CC-Link IE Field Network.
• When using this program example, do not power off and on or reset the CPU module on each system in
separate mode. Change the mode to the backup mode before powering off and on or resetting the CPU
module.
System configuration
The following figure shows a configuration example of the system.
Wiring example
The following figure shows a wiring example.
• TD is an on delay timer wired externally. Input the contact output of the on delay timer to X20.
• The 24V power supply is always input.
(1) Power supply module (R62P)
(2) CPU module (RnPCPU)
(3) Redundant function module (R6RFM)
(4) Input module (RX40C7)
(5) Output module (RY40NT5P)
(6) Tracking cable
(6)
(2)(1) (3) (4) (5) (2)(1) (3) (4) (5)
24V
24V
TD
TD
R62P R6RFM
X20
X21
X22
COM(+)
Y30
Y31
Y32
COM(-)
V(+)
RX40C7 RY40NT5P
RnPCPU
R62P R6RFM
X20
X21
X22
COM(+)
Y30
Y31
Y32
COM(-)
V(+)
RX40C7 RY40NT5P
RnPCPU
(Input) (Output) (Input) (Output)