© ADB Airfield Solutions All Rights Reserved
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2.2.11 I/O Status display
Pressing and holding pushbutton 4 during the Software Version sequence displays the status
of the Input/Output Interface. In this mode, read all the input and output lines. The format
appears like this:
Or a combination of the two.
Each number is linked to a different pair of pins on the input or on the output connector. If the
number is displayed, the corresponding pair of input pins has voltage on them and the
corresponding relay is closed.
NOTE:
Out ?????? means there is nothing written to the outputs since power-up and the
latching relay status is unknown.
The input and output display has numbers 1 though 8 and correspond to the pins as shown in
Table 3:
To exit this mode, press pushbutton 1.
2.2.11.1 Lamps-Out Calibration
for Stand-Alone Mode
In order for the ACE2 to correctly calculate the number of lamps burned-out it has to be
calibrated.
For best accuracy, the lamps-out calibration is done only when CCRs are loaded
to 75% or more of their specified rating. For best accuracy, all lamps on the lamp circuit
being calibrated have the same wattage rating, otherwise the lamps-out detection is not as
accurate on lamp wattages not used in the calibration process. Some devices on a series
circuit such as but not limited to power adapters, L-858 sign electronics, and L-858 sign
fluorescent lamps cause inaccurate lamp-out detection.
In all modes of operation, the calibration is performed in this order;
1. The number of initially present lamps-out is entered in the ACE2
2. The ACE2 steps through all brightness steps and takes measurements.
3. One Lamp is removed from the circuit.
4. The ACE2 steps through all brightness steps again and takes measurements.
5. At this time, it records the Current and Voltage values for each step. If the regulator’s VA
drops to 90% of the recorded value for that step, LOW VA is displayed.
6. Calibration results are confirmed by the operator and stored in the ACE2’s non-volatile
memory.
In the stand-alone mode of operation, the lamps-out calibration is performed using the LO
Calibration local menu command. In the L-829 mode, the ACE2 controls the CCR through the
brightness steps. For an L-827 application, the operator manually changes steps using the
CCR local controls of brightness setting lines.
When connected to an ADB Airfield Solutions L-890 ALCMS the lamps-out calibration is
performed using the vault computer.
Out 87654321
or
Out _ _ _ _ _ _ _ _
Inp 87654321
Inp _ _ _ _ _ _ _ _
Table 3:
LCD’s corresponding Pins
Output
Display
Number
Output Pin
Number
Input
Display
Number
Input Pin
Number
8
1
8
1
7
2
7
2
6
3
6
3
5
4
5
4
4
5
4
5
3
6
3
6
2
7
2
7
1
8
1
8
