FlowLine DataPoint LC52 Series, Руководство пользователя, Страница: 14 / 18

14 of 18 LC900007 Rev A2
APPENDIX Step Nine
Controller Logic: Please use the following guide to understand the operation of the controllers.
1. Power LED: Make sure the Green power LED is ON when power is supplied to the controller.
2. Bar Graph LED: The bar graph LED on the controller will always indicate the proportional 4 ‐ 20 mA input
signal going to the LC52 controller. i.e.: if the tank is 25% full, then 25% of the bar graph will be lit Green.
If a single Amber bar appears, this indicates an input current of less than 4mA. If a single Red LED appears,
this indicates an input current greater than 20 mA. Use this feature to confirm the input signal for the
LC52.
3. Relay LEDs: The normal state of the relay is when the LED is OFF. When the relay becomes energized, the
Red LED will light. If power is removed from the controller, the relay will return to the normal state (LED
OFF).
4. Display: Will indicate the proportional level of the liquid based upon the 4 ‐ 20 mA input. If EasyCal is used
for either the empty tank level, full tank level or both, the display will ignore the 4 ‐ 20 mA input signal and
use the EasyCal setting as it’s empty and/or full position.
Relay Latch Logic Table (relay 2 only): The relay can either be an independent relay (high or low level alarm)
or can be a latching relay (automatic fill or empty) with latch ON. With Latch OFF, the relay will only respond
to the RLY 2A relay set point. RLY 2B will be ignored.
With Latch OFF, the setting for RLY
2B will be ignored. All changes to
the relay’s state will occur from
the RLY 2A relay set point.
Invert OFF Latch OFF
RLY 2A RYL 2B Relay
Wet
Dry
No Effect
No Effect
ON
OFF
Invert ON Latch OFF
RLY 2A RYL 2B Relay
Wet
Dry
No Effect
No Effect
OFF
ON
With Latch ON, the relay will
actuate when the level is above
RLY 2A and RLY 2B. The relay will
not change its condition if the
level is between RLY 2A and RLY
2B. The relay will reverse it’s state
when the level is below both RLY
2A and RLY 2B relay set points.
Invert OFF Latch ON
RLY 2A RYL 2B Relay
Wet
Dry
Wet
Dry
Wet
Wet
Dry
Dry
ON
No Change
No Change
OFF
Invert ON Latch ON
RLY 2A RYL 2B Relay
Wet
Dry
Wet
Dry
Wet
Wet
Dry
Dry
OFF
No Change
No Change
ON
Factory Reset: Returns the LC52 to its original factory set points, including
setting the OFFSET to 4 mA and the SPAN to 20 mA. To perform a Factory
Reset, first remove power to the controller. Hold both the 4/UP and 20/DWN
buttons while adding power to the LC52. An “F” for Factory Reset will appear
in the display indication the Factory Reset was achieved. If an “E” for Error
appears, the Factory Reset was not performed and you will need to try again .
Note: make sure both buttons are pressed while adding power. The “E” will
appear if only one of the buttons is pressed.
Factory Settings for LC52 Series
OFFSET SPAN RLY 1 RLY 2A RLY 2B
4.0 20.0 6.0 18.0 8.0