Mitsubishi MELSEC-A Series Operating Manual page 142

6. HOW TO USE EACH FUNCTION
,,
M W E C - A
[Explanation]
(1)
The MELSECNET(It)/B link state can be displayed on only the self.
Even
if
it is set at another station by the PC number setting, the
MELSECNET(II)/B link state of the self is displayed.
(2) Link state display contents differ depending on whether the connected
station is a master station, local station, or remote I/O station.
However, when connecting to a tier-3 master station, it is displayed as a
master station. A local station cannot be displayed.
(3) When connecting to a master station the loop state and link scan time as
well as the operating state of a slave station can be displayed.
(a) Display of loop state and link scan time
')[
R
M 0 P : O K MIB.
P LO0P:OK
IAI.
I
1)
Positive loop line
(F
loop) or reverse loop line
(R
loop) state of a
master station is displayed.
(The contents of the special relay for links M9225 and M9226 are
displayed.)
OK: When the line is normal
NG: W.hen the line is abnormal
2) Max., min., and current values of a link scan time are displayed.
The contents of special registers for link 09207 to D9209 are
displayed.
(b) Operating state of a slave station
In
the
case of a local station In the case of a remote I/O station
CYCLIC COrY.OlgBR:O
CPU
R W
P LOOP:
0
R LO0P:O R LO0P:O
1)
The station number during monitoring and the number of con-
nected slave stations are displayed.
(The contents of the special registers for link D9243 and D9244
are displayed.)
[Ln] : In the case of a local station
[Rn] : In the case of a remote 1/0 station
m : Number of connected slave stations
2) The following messages display communications states:
(The contents of the special registers for link D9224 to D9231 are
displayed.)
CYCLIC COMM : When normal communications has been
DISCONNECTED :When communications has been inter-
PARAM. COMM : When parameters is communicated with
executed
rupted or is in a disconnected state
a master station
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