c. You will now set the visual effects to be exhibited by the displayed data
field of Channel No. x, when the channel’s data reading is LESS THAN the
low-limit value established in Step a. You will specify that “low violation”
data for Channel No. x is to appear, on a color monitor, as
blinking red
characters on a yellow background
.
1
Enter a command of
VLT x = RYB [CR]
d. Verify the effectiveness of the above VLT command by removing all load
from the channel’s source transducer and observing the resultant display
of Channel No. x.
e. To specify that when the data reading for Channel No. x lies BETWEEN (or
is equal to one of) the two preset limit values, the channel’s data should be
displayed, on a color monitor, with
green characters on a white back-
ground
,
2
enter a command of
VBT x = GW [CR]
f. Verify the effectiveness of the above VBT command by producing a trans-
ducer input between 20% and 80% of full scale and observing the resul-
tant display of Channel No. x.
g. Finally, to specify that when the data reading for Channel No. x is
GREATER THAN the high-limit value established in Step b, above, the
channel’s data should be displayed, on a color monitor, as a
“flashing”
alternation of blue characters on a red background with red characters on
a blue background
,
3
enter a command of
VGT x = BRF [CR]
h. Verify the effectiveness of the above VGT command by producing an
approximately full-scale transducer input and observing the resultant dis-
play of Channel No. x.
i. Before setting “limit logic” for Channel No. x, you should arrange for the
CRT display of Logic Bit Nos. 898 and 899, in order to verify that Bit No.
898 is automatically set to “Logic 1” on occurrence of a high-limit violation
for Channel No. x; and Bit No. 899, on occurrence of a low-limit violation.
Proceed as follows:
1. Use the
Page key as you did in Section 5, Step d, to call to display the
prestored “blank” video page (No. 100).
2. Press the
Video Formt (VIDEO FORMAT) key to enter TEXT EDITOR
MODE. Move the cursor down to about the middle of the screen.
3. Type “
BIT 898,” and then press the Begin Data key.
4. Type
three spaces, followed by
#898
B - 27
LIMIT SETUP
“O
NTHE
A
IR
” (B-S
IZED
)
1
If you have a monochrome monitor, command VLT x = 02B [CR] to specify blinking black
characters on a white background for data in the “LESS THAN” zone.
2
If you have a monochrome monitor, command VBT x = 12 [CR] to specify half-intensity
characters on a white background for data in the “BETWEEN” zone.
3
If you have a monochrome monitor, command VGT x = 20F [CR] to specify a “flashing”
alternation of white characters on a black background with black characters on a white
background for data in the “GREATER THAN” zone.
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