Modicon M580 Plc Page 3-22 Communication

3/22 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 field 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 field 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 configured 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 configured 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 configured 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 configured 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 field shows the time zone in terms of plus or minus Universal Time Coordinated (UTC) NTP Service Statistics These fields show the current values for service statistics Number of Requests This field shows the total number of requests sent to the NTP server Success Rate This field shows the percentage of successful requests out of the total number of requests Number of Responses This field shows the total number of responses received from the NTP server Last Error This field contains the code of the last error that was detected during the transmission of an email message to the network Number of Errors This field 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 2 1 3 4 5 6 7 8 9 10 2 1 3 4 5 6 7 8 9 10

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