Transmission Delay Time - Mitsubishi Electric QJ71LP21 Reference Manual

3 SPECIFICATIONS

3.3.2 Transmission delay time

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(4) SB/SW when a communication error station/communication stop
station occurs on the network
The status of whether there are any communication error/communication stop
stations on the network can be checked with the link special relay/register
(SB/SW).
Use them as interlocks for programs.
Link special
relay/register
SB47 Shows the baton pass execution status of the host.
SB49 Shows the cyclic transmission status of the host.
Shows the baton pass execution status of all
stations (including the host). However, it only shows
SB70
the status for the number of stations set with
parameters.
Shows the baton pass execution status of each
SW70 to 73 station.
Each bit corresponds to the status of each station.
Shows the cyclic transmission status of all stations
(including the host). However, it only shows the
SB74
status for the number of stations set with
parameters.
Shows the cyclic transmission status of each station.
SW74 to 77
Each bit corresponds to the status of each station.
The names of items (1), (2) on the following pages indicate those between the
following stations.
Remote master station
M
R
(1)
R
R
Remote I/O station
Item Name
Remote master station
Multiplexed remote master station
Link special relays and registers
Description
Multiplexed remote
master station
remote I/O station
multiplexed remote sub-master station
MELSEC-Q
Signal status
Off
The baton
pass is being
executed
Normal
The baton
pass is being
executed on
all stations
The baton
pass is being
executed
All stations
normal
Normal
Multiplexed remote
sub-master station
(2)
DM
DSM
R
R
(1)
(1)
R
R
Remote I/O station
On
The baton
pass is
stopped
Abnormal
Occurrence
of
communicati-
on stop
station
The baton
pass is
stopped
Occurrence
of abnormal
station
Abnormal
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