Digital Monitoring Products, Inc.
1912XR Programming
Page 35
16.3 Diagnostics function
The 1912XR panel contains a diagnostics function that allows you to conduct a test of the 881
Expansion Interface Card, individual loop locations, and the current state of any loop on the panel.
From the Status List, enter in the diagnostics code of 2313 (DIAG) and press Command.
Test 881
The keypad display changes to TEST 881. This function allows you to test the ability of the 862N,
862P, 872, and 881 Interface Cards to communicate with loop and output expanders connected to
their LX-Bus™. The TEST 881 function requires that you have (or momentarily set) the address of
one of the expanders on the LX-Bus to address 00 (zero, zero).
Although you can use any of the interface card's loop or output expanders, if you select the
expander farthest from the panel, you can also verify that the communication link to all expanders is
within acceptable limits.
To continue, press any top row SELECT key. The keypad display changes to TESTING 881. The
panel now polls address 00 exactly 100 times and records the number of no responses to its polling.
If all polls are received back by the panel correctly, the keypad displays 0/100 FAILURES. The 0
(zero) represents the number of failed polling responses.
If one or more polling attempts fail, the keypad displays * * * / 100 FAILURES. (The * * * represents
the number of polling attempts out of 100 that failed.) A display of 100 / 100 FAILURES indicates a
problem with the interface card or its LX-Bus wiring such as a bad or broken wire, harness not
properly connected, or excessive noise or distance.
Loop Finder
Press the Command key to display LOOP FINDER. This function allows you to identify individual
loops connected to either the 881, the panel, or any loops on the keypad data bus. To use LOOP
FINDER, press any top row SELECT key. The display changes to FAULT LOOP. The next loop on
the system that changes from a normal to an open or shorted state is displayed as LOOP NO: * * *.
Press the ARROW key twice to return to LOOP FINDER.
Loop State
Press the Command key to display LOOP STATE. This function allows you to enter any loop
number and check its current hardware state. Press any top row SELECT key. The display changes
to LOOP NUMBER: _ . Enter in the number of the loop you want to check and press COMMAND.
The panel then displays the current state of the loop as either OPEN, NRML, (normal), or SHORT.
To exit the diagnostics function, press the ARROW key until you see the display STOP then press
any top row SELECT key. The keypad returns to the Status List display.
16-APPENDIX
(84 pagine)
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