HOSE AS 7R9118 - Caterpillar

Table 1 describes the items of information on Field Communications Monitor.You can include responses to filtered messages, and perform other tasks using "Field Communications Monitor" by selecting the "Actions" menu.Field Communications Monitor Statistics
This feature allows the user to gather statistics on a number of operational communications parameters for a site either in real time, or calculated from historical logs.By default, the feature is turned off so that no unnecessary load is placed on the system by the process of accumulating the statistics.To enable the statistics feature, select "Action" then "Include Statistics". Enabling the statistics feature displays a tree of check boxes that allow individual statistics to be gathered, described in Table 2.Quick Reference
Table 2
Field Communications Monitor Statistics Information
Item Description
Duplicates (percentage of total) The percentage of duplicate messages sent from the field. Duplicates are sent because the onboard system has not received an acknowledgment message from the office. Duplicate messages can be because of a failed receiver on an individual machine, an area of poor coverage in a particular location of the mine, a failed access point transmitter, or interference.
Latency (seconds) The amount of time taken for an inbound message to travel from the field to the office. The timer starts when the message is first generated onboard. Long latencies can be associated with network congestion, failing mobile transmitters, failing access point receivers, poor coverage or causes similar to those causing duplicates. The office time clock must be synchronized with a reliable GPS source, otherwise the user cannot rely on time information. Latency is indicated at the bottom of the statistics window, with the colored numbers indicating as follows:
Gray - the data has been received and the time received in is good.
Blue - the data has been received and the time received in is a bit out of spec, but fine.
Red - the data has not been received. Data not being received could mean that the office time and the field times are not synchronized.
Message Size (bytes) The number of bytes in each message. For some message types number of bytes is affected by things such the length of names associated with entities such as waypoints. As the Series TC900 radio network performs best with small messages sizes (small slot is equal to less than 30 bytes, multiple long slots are equal to greater than approx. 200 bytes). investigating the distribution of message payload sizes when tuning network performance can be useful.
No Response (percentage of total) The percentage of messages sent from the office to the field for which no response was received. No response can indicate areas of poor coverage or failing radios.
RTT (seconds) The round-trip time for messages sent from the office and acknowledged by the field. Round-trip time can help understand coverage and congestion issues with the network as a whole or identify individual machines with communications issues. Round-trip times do not have associated GPS coordinates and hence, to plot RTT on the map the last known location is used, if available.
Satellites The number of GPS