Mitsubishi L26CPU-BT, User Manual

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8 FUNCTIONS
8.2.6 Station status at error occurrence
This section explains the status of each station that is set in Network Parameter’s "PLC
Down Select" and "Operation Setting" in case of error occurrence. (Refer to Sections
8.2.3, 8.2.4 and 8.2.5.)
(1) Status of the master station, standby master station (acting as a
master station) and remote I/O station at error occurrence
The following shows the operations of the master station, standby master station
(acting as a master station) and remote I/O station upon the occurrence of an
error.
Master station, standby master station
(acting as a master station)
Remote I/O station
Data link status
Remote input (RX)
Remote output
(RY)
Remote
register (RWw)
Remote register
(RWr)
Input Output
When data link is stopped due to an error generated
by the master station programmable controller CPU
(data link continue)
Continue
1
Continue Hold Continue
1
When data link is stopped due to an error generated
by the local station programmable controller CPU
(data link continue)
2
Continue Continue Continue Continue Continue
Clear Clear
When data link for
the entire system is
stopped
The GX Works2 data
link faulty station is
set (master station
setting)
Hold Hold
Undefined Undefined Hold
By external
signals
All points OFF
Clear
Clears the receive area
from the remote I/O
station having a
communication error
When a
communication error
(power off, etc.)
occurs in a remote
I/O station
The GX Works2 data
link faulty station is
set (master station
setting)
Hold
Retains the receive
area from the remote
I/O station with a
communication error
Continue
Continues
operation of
areas other than
the remote I/O
station Continues
operation of
areas other than
the remote I/O
station
By external
signals
All points OFF
Clear
Clears the receive
area from the remote
device station with a
communication error
When a
communication error
(power off, etc.)
occurs in a remote
device station
The GX Works2 data
link faulty station is
set (master station
setting)
Hold
Retains the receive
area from the remote
device station with a
communication error.
Continue Continue
Retains the
receive area
from the remote
device station
with a
communication
error Continue
(Not affected by
the
communication
status of the
remote device
station) Continue
(Not affected by
the
communication
status of the
remote device
station)
Clear
Clears the receive
area from the local
station with a
communication error
When a
communication error
(power off, etc.)
occurs in a local
station
The GX Works2 data
link faulty station is
set (master station
setting)
Hold
Retains the receive
area from the local
station with a
communication error
Continue Continue
Retains the
receive area
from the local
station with a
communication
error Continue
(Not affected by
the
communication
status of the
local station) Continue
(Not affected by
the
communication
status of the
local station)
1: If parameter setting has been made using the dedicated instructions, the data is
held. If parameter setting has been made using GX Works2, the data is cleared
when the RY refresh device is set to Y, the data is cleared or held when the RY
refresh device is set to other than Y. (Refer to Section 8.2.5.)
2: When the RY refresh device is set to "Y" for the local station that has stopped,
only the receive area is cleared from the stopped local station ; the receive area is
retained or cleared when the RY refresh device is set to other than Y. (Refer to
Section 8.2.5.)
Operation continues for the receive areas from other stations.