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5 DATA LINK PROCESSING TIME
MELSEC-QnA
5
5. DATA LINK PROCESSING TIME
5.1 Status of Each Station When an Error Has Occurred
The status of each station when an error has occurred is shown in the table below.
Master station Remote I/O station
Data link status
Remote input (RX)
Remote
output
(RY)
Remote
register
(RWw)
Remote
register
(RWr)
Input Output
When the master station's programmable controller CPU is
stopped
(data link continue)
Continue
All "0"
1
Continue Continue Continue
All points
OFF
When the local station's programmable controller CPU is
stopped
(data link continue)
All points off only
in the receive area
from the stopped
local station
1
Continue Continue Continue Continue Continue
Clear Clear Master
station
Keep Keep
– – Keep
Clear
When data link is
stopped in the entire
system
Input-data status
setting of faulty
station (SW4)
Local
station
Keep
–
All points
OFF
Clear
Clear the receive
area from the
remote I/O station
with a
communication
error.
Master
station
Keep
Keep the receive
area from the
remote I/O station
with a
communication
error.
Continue Continue Continue
Clear
When a communication
error (power off, etc.)
occurred in a remote I/O
station
Local
station
Keep
–
All points
OFF
Clear
Clear the receive
area from the
remote device
station with a
communication
error.
Master
station
Keep
Keep the receive
area from the
remote device
station with a
communication
error.
Continue Continue
Keep the
receive area
from the
remote device
station with a
communication
error.
Clear
When a communication
error (power off, etc.)
occurred in a remote
device station
Input-data status
setting of faulty
station (SW4)
Local
station
Keep
Continue Continue
Clear
Clear the receive
area from the local
station with a
communication
error.
Master
station
Keep
Keep the receive
area from the local
station with a
communication
error.
Continue Continue
Keep the
receive area
from the local
station with a
communication
error.
Clear
When a communication
error (power off, etc.)
occurred in a local
station
Input-data status
setting of faulty
station (SW4)
Local
station
Keep
Continue Continue
1 : Because Yn0 (refresh instruct) is turned OFF.