[esp-r] Questions about *.cgc file ?

[QIU]

Dear all,

I set something in my casual gain control *.cgc file as follows,

illuminance set point, 320 lux, 
switch off level, 150%
night calibration, 44.5 lux
control slope, -0.028

I think the light should switch off if illuminace is lower than 320 lux. but after simulation, from "zone casual gain trace file", I find light switch off under the condition that illuminace is lower than 75 lux, why that?

what function does "switch off level, 150%" have?
and  what function does "control slope, -0.028" have?
and how to get the control slope number?
 

thank you.

Warm regards, 
ZZ