DL8000 Preset Instruction Manual
Revised February-2016
DL8000 Keypad Display
E-85
Once the diagnosis is in process, the program checks only for the
following AI alarms:
Point fail alarm. (Terminate diagnostics)
Scanning manual alarm (Info alarm)
If multiple alarms occur, the system displays the alarm with the highest
priority. In this case, the Point Fail alarm has the highest priority, and
immediately terminated the diagnostic process.
While the diagnostic process is in progress, the system does not
consider alarms for the module under test.
Note
:
If the AO is connected to some external contact such as a digital
multi-meter, the results appear on the multi-meter instead of the
preset display.
Affected
TLPs
When you select this test, the system sets certain AI and AO module
parameters to specific values to perform the test (as noted below). Once
you complete the test, the system restores all TLP to the values they had
before the test began.
Scanning [103,X,02]
Zero EU [103,X,13]
Mid Point EU #1 [103,X,14]
Mid Point EU #1 [103,X,5]
Mid Point EU #1 [103,X,16]
Span EU [103,X,17]
Scanning Mode [104,X,2]
Zero EU [104,X,10]
Span EU [104,X,1]
Manual Value [104,X,4]
E.5.4 Diagnosing Analog Inputs (AI)
Note
:
The preset must have an installed AI module to diagnose the AI.
If no AI module is present, the system displays a
No AI Card in
system
error message.
Hardware/
Wiring
You can connect an AO channel with the AI channel to be tested, or
connect to an external analog source. See
Figure E–11
.
Note
:
Connect a
250 Ω precision
resistor (as shown) if the AI channel
carries a 4–20 mA signal.