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

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.
(1) (2) (3) (4) (5)
(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
Wiring example
The following figure shows a wiring example.
RnPCPU
RX40C7
R62P R6RFM (Input)
X20
X21
X22
COM(+)
24V
TD
• 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.
(6)
RnPCPU
RY40NT5P
(Output) R62P R6RFM
Y30
Y31
Y32
V(+)
COM(-)
24V
(1) (2) (3) (4) (5)
RX40C7 RY40NT5P
(Input) (Output)
X20
X21
X22
COM(+)
TD
26.7 Determination of Control System/Standby System
Y30
Y31
Y32
V(+)
COM(-)
26 BASIC CONCEPT
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