Transmission Path Diagnosis Information; Configuration Of Transmission Path Diagnosis Information - Toshiba nv Series Instruction Manual

7.2

Transmission path diagnosis information

The EN811 modules on the same segment mutually monitor the operation states
of other units.
In other words, a diagnosis frame is submitted at a fixed cycle (10-second cycle)
using the port number 48000. The EN811 modules on the same segment
mutually check receptions. When the corresponding node receives it once, the
bit of the node becomes "1." Starting from the point in time, if no diagnosis frame
is received for 60 seconds continuously, the bit of the node becomes "0."
The information configuration of each node is as shown below. The information
of each node is generated based on the station address part of the IP address
(e.g. "11" when the IP address is 172.16.64.11), which is valid within the same
subnet.
Remark
• It operates when "software option switch 0" is turned on in the engineering tool.

7.2.1 Configuration of transmission path diagnosis information

The transmission path diagnosis information is managed in the following
configuration. The relation between the applicable bit and diagnosis frame is as
shown below.
Applicable bit "1"......A diagnosis frame has been received within the past 60
seconds.
Applicable bit "0"......No diagnosis frame has been received within the past 60
seconds.
F E
ST15 ST14 ST13
ST31 ST30 ST29
ST255 ST254 ST253
Figure 7-5 Configuration of transmission path diagnosis information
If the station is in a redundant configuration, diagnosis process is also performed
by the EN811 module installed in the ONLINE or STANDBY system to check the
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Unified Controller nv series Ethernet (EN811) Module Operation Manual
7.2 Transmission path diagnosis informatio
3 2
ST3 ST2 ST1
ST19 ST18 ST17 ST16
ST243 ST242 ST241 ST240
0
ST0
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