EDI LMD Series Посібник з експлуатації - Сторінка 8
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2.2.5 CALL MODE (C)
The Call mode will set the channel output to the Call state (True). This mode can be used
to provide a continuous Call state to the Controller Unit regardless of the state of the
detection zone. Loop fault conditions are ignored in this mode.
2.2.6 OFF MODE (-)
The Off mode will set the channel output to the No Call state (False). This mode can be
used if the channel is not used or not connected to a loop. Loop fault conditions are ignored
in this mode.
2.3 SET THE FREQUENCY
Pressing the FREQ button once will display the Frequency
Level (1 – 4) without changing the setting. After pressing
the FREQ button to display the current Frequency Level,
the setting can then be changed by pressing the FREQ
button again. The display will automatically return to the
normal display after several seconds.
The Frequency level needs to be changed only if
interference occurs between adjacent loops connected to
different sensor units. Interference or crosstalk may manifest itself as chattering of the call
output or a detect call occurring at the same time as an adjacent unit when there is no
vehicle present. If crosstalk is suspected, try to separate the frequencies of the channels
causing the problem. A minimum of 5 KHz separation is recommended. Four frequency
levels are available on each channel to assist in alleviating interference affecting more than
two units.
Changing the Frequency Level will cause the channel to retune.
2.3.1 DISPLAYING THE LOOP FREQUENCY
The current loop frequency is displayed by after pressing the FREQ button to display the
current Frequency Level. The frequency is shown in KHz with a "-" symbol displayed both
before and after the numeric digits shown on the DEFLECTOMETER.
For example, after pressing the FREQ button once the display sequence might show:
"3" "-" "2" "7" "-"
This sequence would indicate Frequency Level "3" and a loop reference frequency of 27
KHz.
2.4 SET THE DELAY AND EXTEND TIMING (LMD622T AND LMD624T ONLY)
2.4.1 DELAY TIMING
For each channel, a delay time of 1 to 63 seconds can be set via the DELAY DIP switches.
The numeric sum of the switches in the On position is equal to the Delay time. Call Delay
time starts counting down when a vehicle enters the loop detection area. During the Delay
time the DET indicator will flash two times per second and the DEFLECTOMETER will
display the letter "d". Delay time can be overridden by a True signal at the Timer Control
input.
2.4.2 EXTEND TIMING
For each channel, an extend time of 0.25 to 15.75 seconds can be set via the EXTEND DIP
switches. The numeric sum of the switches in the On position is equal to the Extend time.
Eberle Design Inc.
LMD622 and LMD624 Series
Operations Manual
Frequency
Level 4
High
Medium
Level 3
High
Medium
Level 2
Low
Level 1
Low
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