PCC-IV Instruction Manual (rev. 0.1)
Page 3-7
Section 3
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Operation
second loop). However, the front panel display will display only one of the two loops at a time. The operator will
select which loop is to be displayed by pressing the LOOP soft-button.
In this example, the PSI and LEVEL text at the bottom of the screen would indicate which loop (LEVEL or PSI) is
currently being displayed on the bargraphs, and which loop Auto-DIS is using to select a display channel (see pg.
3-5 for Auto-DIS). Pressing the LOOP soft-button causes the selected loop to toggle back and forth: LEVEL to PSI,
PSI to LEVEL, LEVEL to PSI, …
Once a loop is selected, Auto-DIS works as described above for the currently selected loop. If PSI is the selected
loop: Auto-DIS would display PSI when the PSI AUTO/MAN button is put into AUTO, and FIRING RATE when put
into MAN. If LEVEL was the currently selected loop, Auto-DIS displays DRUM LEVEL in AUTO and FEEDWATER
VALVE in MAN.
AUTO/MAN Soft-buttons Loop Select Method: An alternative method for selecting the currently displayed loop is to
use one of two AUTO/MAN soft-buttons for each loop as the loop select soft-button. This method is used when
there is no Loop soft-button.
If the LEVEL loop is currently being displayed, pressing the PSI AUTO/MAN soft-button would change the displays
from the LEVEL loop to the PSI loop, but the PSI AUTO/MAN status would not change. After the PSI loop has been
selected for display, pressing the PSI loop AUTO/MAN soft-button would toggle the Auto-Manual status as
expected.
When the PSI loop is currently being displayed, pressing the LEVEL AUTO/MAN soft-button would change the
displays from the PSI loop to the LEVEL loop, but the LEVEL AUTO/MAN status would not change. After the LEVEL
loop has been selected for display, pressing the LEVEL loop AUTO/MAN soft-button would toggle the Auto-Manual
status as expected.
The text at the bottom of the screen would display which loop is currently being displayed on the bargraphs.
