Lighting Control Overview Software Overview • 33
10.4. Lighting Control Overview
The case controller will control the light relay based on an internal schedule. The scheduled on and off times are repeated every day.
The controller does not depend on a supervisory controller or E2e for lights scheduling however the ON/OFF times are adjustable from
E2E.
10.5. Fan Control Overview
The fan control relay will operate according to the control mode selection made for parameter Fop. The table below outlines the options
and their descriptions:
10.5.1. Fan Activation After Defrost Cycle
If the fan is OFF during the defrost, it turns ON once refrigeration starts using these methods:
Temperature activation: Following defrost, once refrigeration is active again, the defrost termination temperature must drop to a
setpoint (Fst) minus hysteresis (Fhy), causing the fan relay to turn ON.
Time: The controller will monitor the defrost sequence to determine when defrost ends and when refrigeration is back ON. Once
refrigeration is back ON following a defrost, the fan will start after a time delay (Ftd).
Not Used: The fan will start immediately after defrost with the refrigeration cycle again.
Parameter Description Range
LightOnHour Schedule time for lights ON hour 0-23 Hours
LightOnMinute
Schedule time for lights ON minute 0-59 Minutes
LightOffHour
Schedule time for lights OFF hour 0-23 Hours
LightOffMinute Schedule time for lights OFF minute 0-59 Minutes
Table 10-9 - Lighting Control Parameters
FanOp Parameter Values Description
OnR-OfD Fan ON with the refrigeration output ON, Fan OFF during defrost
OnR-OnD Fan ON with the refrigeration output ON, Fan ON during defrost
OnF-OfD Fan ON continuously; fan OFF during defrost
OnF-OnD Fan ON continuously; fan ON during defrost
Table 10-10 - Fan Control Relay Values for Fop
Parameter Values Description Range
FanOp Fan mode of operation OnR-OffD, OnR-OnD,
OnF-OnD, OnF-OffD
FAd Fan activation method after defrost Nu, time, temperature
Table 10-11 - Fan Control Parameters
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