Keri Systems PXL-100 - Manual (Page 11)

Page 11
01816-100 Rev. E
1530 Old Oakland Rd., Ste 100 San Jose, CA 95112 U.S.A. (800)260-5265 (408)451-2520 Fax (408)441-0309
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PXL-100:SMART ENTRY CONTROLLER
9) Diagnostics Guide
RAM test. It causes the 10 amp form C relay to toggle on and off while th RAM is
scanned. The RAM check sum is read for each cycle of the relay. If the check sum
changes, the change indicates a RAM failure. The LCD will show the number of times
the relay is cycled and the number of RAM failures:
RAM STABILITY
P= 00000 F=00000
The number of times the relay is cycled is indicated by the P number; RAM failure
is indicated by the F character.
One failure is too many. The RAM must be reset; but before resetting the RAM, isolate
the source of the interference. Disconnect the load from the relay. Run the stability test.
If the RAM does not fail, the problem is in the load. Check all connections and add
suppression. If the RAM continues to fail, disconnect the network cable and rerun the
test. If the test passes, check all network connections and try to isolate the area of
network cable where an electrical interference is occurring. If the RAM continues to fail,
add suppression to the AC power line input.
Watchdog Test:
Object Of The Test: To ensure the operation of the watchdog timing circuit is operating.
When To Use The Test: To check the watchdog, or if symptoms indicate the watchdog is
not working---if the controller locks up and will not reset unless primary power is removed
andreapplied.
Procedure: Perform this test after all other tests are completed because if the watchdog
is functioning, the completion of the test will exit the diagnostics program. As soon as the
watchdog test is initiated, the LCD will show the following:
WATCHDOG TEST
COUNTDOWN 4
The countdown number will continue to step to 1 and if the watchdog timer is
functioning the controller will exit the diagnostics program and the LCD will show the KERI
name the day and time.
Media Test:
Object Of The Test: To verify the encoded number on a Wiegand or mag-stripe card and
the proper operation of the reader.
When To Use The Test: Final testing the system to check the reader and card operation.
Procedure: With the Wiegand or mag-stripe reader connected to the OB-7, initiate the
Media Test function. Present the card to the reader. If successfully read, the card’s
encoded number will appear on the LCD.
Note: For PXL-100 versions with revision numbers of 2.4 or less, the card encoded
number will be printed in HEXADECIMAL .