16
5
Monitoring Heat
Tracing Circuit
Status
5.1 The Interface
Local interaction with the TCM2 panel takes place through the TCM2 module’s
simplified four-button membrane switch, four-line display and its three tri-color
LEDs. See
Table 5.1
which follows for a complete explanation of the physical
interface. Upon power up, the TCM2 will display the start-up screen message
similar to that shown in
Figure 5.1
.
Figure 5.1:
TCM2 User Interface at Start-Up
After this start-up message, the TCM2 will immediately begin normal operation
and display the Circuit Screen. Once the Circuit Screen is shown, the TCM2 will
control each enabled circuit according to its set-points.
Figure 5.2
describes the
information shown on a typical Circuit Screen in normal operation with two RTD’s
on Circuit 1 and no alarms. If any alarms are present, a corresponding alarm
message will be displayed on the lowest line of the screen, the Alarm Line. If
multiple alarm events occur on a circuit, the TCM2 will display one alarm
message at a time until all have been cleared.
Figure 5.2:
Typical Circuit Screen
