Technical information

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Modicon M580 automation
platform
Embedded web pages
Presentation (continued)
Diagnostic web pages (continued)
Messaging page
This page shows current information for open TCP connections on port 502:
b Messaging Statistics: This eld contains the total number of sent and received
messages on port 502. These values are not reset when the port 502 connection is
closed. Therefore, the values indicate the number of messages that have been sent
or received since the module was started.
b Active Connections: This eld shows the connections that are active when the
Messaging page is refreshed.
QoS (quality of service) page
This page displays information about the QoS service. This service is congured in
Unity Pro. When QoS is enabled, the module adds a differentiated services code
point (DSCP) tag to each Ethernet packet it transmits, thereby indicating the priority
of that packet.
Network Time Service page
This page displays information about the NTP service. This service is congured in
Unity Pro. The Network Time Service synchronizes computer clocks over the
Internet for the purposes of event recording (sequencing events), event
synchronization (triggering simultaneous events), or alarm and I/O synchronization
(timestamping alarms).
Field Description
Service Status Running The NTP service is correctly congured and running
Disabled The NTP service is disabled
Unknown The NTP service status is unknown
Server Status Green The server is connected and running
Red A bad server connection is detected
Gray The server status is unknown
Server Type Primary A primary server polls a master time server for the
current time
Secondary A secondary server requests the current time only from
a primary server
DST Status Running DST (daylight saving time) is congured and running
Disabled DST (daylight saving time) is disabled
Unknown The DST status is unknown
Current Date This is the current date in the selected time zone
Current Time This is the current time in the selected time zone
Time Zone This eld shows the time zone in terms of plus or minus Universal Time
Coordinated (UTC)
NTP Service
Statistics
These elds show the current values for service statistics
Number of
Requests
This eld shows the total number of requests sent to
the NTP server
Success Rate This eld shows the percentage of successful requests
out of the total number of requests
Number of
Responses
This eld shows the total number of responses
received from the NTP server
Last Error This eld contains the code of the last error that was
detected during the transmission of an email message
to the network
Number of
Errors
This eld contains the total number of email messages
that could not be sent to the network or that have been
sent but not acknowledged by the server
Messaging
QoS
Network time service
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