PATLITE NHL - Manual (Page 36)

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3.9.3 Ping Monitoring Function (“Clear” Command Outside Sources)
(When a "Clear" execution from an outside source is requested at the time of abnormality detection)
The following is an example for the procedure when an executed "Clear" command is received from an outside source
while the Ping Monitoring function detects an abnormality ("Clear" command executed via the "Clear" switch, RSH
"Clear" Command, PNS "Clear" command, SNMP "Clear" Command, or a "Clear" Command from the Web Setup
Tool).
Example) When a "Clear" command is transmitted from an outside source at the time an abnormality is detected by
the Ping Monitor.
1. From the monitoring condition, when a monitoring abnormality occurs, the condition of the Signal
Tower changes at the time of detecting the abnormality.
2. If a "Clear" command is received during the abnormality detection, the status of abnormality detection
will be cleared and it will return to its normal mode.
3. If there is a Ping response from the next Ping monitor execution, the monitoring condition will continue
as normal. If there is no response, the condition will immediately return to the abnormality detection mode.
Fig. 3.9.3 Setting screen 21 to 24 operation flow-chart example
Please
In cases where it returns to a monitoring condition from a "Clear" command, it
will not branch to the "Ping Recovery" operation from an abnormal detection.
Ping Monitoring
Period
Abnormality detection
and judgment
Execution starts when
abnormality is
detected
When abnormality is
detected, a "Clear"
command is executed
The condition of the
detected abnormality will
be in the "Clear" status.
When there is a Ping response
during the monitoring condition
The monitoring
condition continues
Monitoring
Side
NHL Side
Set up with the
Web Setup Tool
Ping Monitoring
starts after setup
completion
Ping
Transmission
When there is no Ping response
during the monitoring condition
"Clear" Execution
"Clear"
Execution
Condition returns to
a monitoring state
If the abnormality is
cleared from the "Clear"
command, the "Ping
Recovery" operation is
not necessary
An abnormal condition
will be detected
When there is no Ping
response during the ping
monitoring period
Ping Monitoring
Condition
Ping Monitoring
Abnormal Condition
Ping Monitoring
Condition
Ping Monitoring Condition
Ping Monitoring
Abnormal Condition