Mitsubishi Electric MELSEC Q Series Reference Manual page 51

(3) List of RAS functions
Function
Control station switching
Loopback
Automatic return
Cable fault detection
Cable insertion error detection
Detection of duplicated control station
or station No.
External power supply
Detection of time of transient
transmission error completion
Transient transmission in the case of a
CPU module error
1) Safety CPU
2) Basic model QCPU
3) High Performance model QCPU
Description
Even if the control station goes down, a normal
station (sub-control station) takes over the control
to continue data link.
Any disconnected cable or faulty station is isolated
from the network, and data link can be continued
among normally operating stations.
When a station disconnected from a network due
to a data link error recovers from the error, the
station is automatically reconnected to the network
and restarts data link.
A cable fault can be detected as a cause of a
communication error.
Incorrect cable connection between OUT and IN
can be detected as a cause of loopback or
disconnection from the network.
Duplication of the control station or station No. can
be detected as a cause of loopback or
disconnection from the network.
The external power can be directly supplied to the
CC-Link IE Controller Network module with
external power supply function.
The time at which a transient transmission by a link
dedicated instruction failed can be detected, and
network No. and station No. of the station where
the error is detected can be confirmed.
Transient transmission can be performed to
another station even if an error has occurred in the
CPU module of the station.
CHAPTER 3 SPECIFICATIONS
4) Process CPU
5) Redundant CPU
6) Universal model QCPU
CPU module
Reference
1) 2) 3) 4) 5) 6)
Page 124,
Section 4.4.1
Page 125,
Section 4.4.2
Page 127,
Section 4.4.3
Page 127,
Section 4.4.4
Page 128,
Section 4.4.5
Page 129,
Section 4.4.6
Page 134,
Section 4.4.7
Page 324,
CHAPTER 9
: Available, : Partially available, ×: N/A
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