Problems Due To Operation Error In The Master Station - Mitsubishi Electric MELSEC-Q Series User Manual

11.2.4

Problems due to operation error in the master station

(1) Problems due to operation error in the master station
Problem Check item
G1-1 Data link stop
Data link
cannot be
stopped/
restarted.
G1-2 Data link restart
Error invalid station
A faulty station
setting
cannot be G2-1
detected.
Are station numbers
unique?
Can a faulty station
be identified using
A station Other station data
becomes faulty link status (SW0080
at a certain G3-1 to SW0083)?
transmission Do communications
speed. normal at a slower
transmission speed
(e.g. 156kbps)?
288
Description
Is Data link stop (SB0002)
on?
Does no error occur?
Is Data link restart
(SB0000) on?
Does no error occur?
Isn't the corresponding
station disconnected?
Isn't the station set as an
error invalid station?
Are station numbers
unique?
Can a faulty station be
identified using Other
station data link status
(SW0080 to SW0083)?
Do communications normal
at a slower transmission
speed (e.g. 156kbps)?
Check method
Check the program.
Check the refresh devices
set in the network
parameter.
Check Data link stop result
(SW0045).
Check the program.
Check the refresh devices
set in the network
parameter.
Check Data link restart
result (SW0041).
Check cables visually or by
the line test using a
programming tool.
Check the parameter.
Check the operating status
of the CPU module on the
corresponding station (for
local station).
Check Error invalid station
specified status (SW0078 to
SW007B).
Check Temporary error
invalid status (SW007C to
SW007F).
Check the station number
setting.
Check transmission speed
of the faulty station.
Check if the cables are
properly wired.
Check if the cables are
grounded by the shielded
part.
Are terminating resistors
connected to the both ends
in a CC-Link system?
Check if a station with built-
in terminating resistor is
connected other than at
both ends in the CC-Link
system.
Corrective action
Correctly set the link special
relay (SB).
Turn on Data link stop
(SB0002).
Take a corrective action
according to the error code.
Correctly set the link special
relay (SB).
Turn on Data link restart
(SB0000).
Take a corrective action
according to the error code.
Correct the cables and
settings of the
corresponding station and
start the system.
Cancel the error invalid
station setting.
Cancel the temporary error
invalid station setting.
Correct the station number.
Set the transmission speed
same as the master station.
Correct the wiring.
Ground the shielded part.
Connect terminating
resistors to the both ends in
the CC-Link system.