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Pressure Systems, Inc. 98RK-1 & 9816 User’s Manual©
Page 137 www.PressureSystems.com
6.1.2 Checking Module LED Power-Up Sequence
(1) Power to each module should be verified. Since module power is supplied by the 98RK-
1 Scanner Interface Rack, make sure that the rack is plugged into the proper type of
power receptacle.
(2)
Turn the rack power supply ON and verify the front panel LED status (for each installed
scanner) following initial power-up:
● PWR LED should remain ON.
If this LED is not on, all other LEDs will likely be off. Make sure the module is
properly seated (mated) with the rack and the rack is plugged into a proper power
receptacle. Do not unplug or reseat a module while rack power is ON.
● TX LED should remain OFF.
Note that any activity of the TX LED during the power-up sequence is an
indication that the Dynamic IP assignment protocol is enabled. This will typically
occur following the initial BSY LED cycle and continue until an appropriate server
reply is received.
● LNK LED should remain ON.
This LED indicates proper connection to an Ethernet hub or switch. If this LED is
off, verify that the rack is properly connected to the communications hub or
switch.
● COL LED should remain OFF.
● PRG LED should remain OFF.
● CAL LED should remain OFF.
● BSY LED should blink 8-16 times at a rate somewhat slower than 1 Hz, delay ON
for approximately 30 seconds and then start to continuously blink at
approximately 100 Hz (rate is dependent on the number of internal averages).
This faster blink rate may simply appear as a dimly-lit LED. Note that the BSY
LED will not begin its 100 Hz blink rate if the Dynamic IP assignment protocol is
enabled and the module has not received a proper IP address response.
Any significant variation from this power-up LED sequence is an indication of a possible rack
problem or a 9816 microprocessor board (PC-299) error. If the proper power-up LED sequence
is not achieved after following the above suggestions, contact the Repair Department at
Pressure Systems for additional assistance (1-800-678-SCAN).