Level Pro ITC 450 User Manual page 29

ITC 450/470
User manual
"modE" - relay operation mode:
"noAC"
the relay is not active (permanently turned off )
one threshold mode, the relay is turned ON when input signal exceeds the SEtP +
"on"
HYSt value, and is turned off when the input signal became ower than SEtP – HYSt,
one threshold mode, the relay is turned OFF when input signal exceeds SEtP + HYSt
"oFF"
value, and is turned on when the input signal became lower than SEtP – HYSt,
two threshold mode, the relay is turned ON when the input signal is greate than
"lower threshold + HYSt" and below than "bigger threshold
"in"
HYSt", and turned off when the input signal is contained within the second zone.
The hanger threshold equals the hanger one of "SEtP" and "SEt2" thresholds, the
smalle threshold" means the smaller one of "SEtP" and "SEt2" thresholds.
two threshold mode, relay is turned ON when the input value is greater than
"bigger threshold + HYSt" and lower than "smaller threshold – HYSt" , and turns on
"out"
when the input signal is contained in the second zone. The hanger threshold means
hanger one of "SEtP" and "SEt2" thresholds, the Smaller threshold" means Smaller
one of "SEtP" and "SEt2" thresholds.
"modb"
the relay is controlled via RS-485 interface, independently on the input signal.
• LEDs lights up when relays are closed, independently of relays' mode.
• When the power supply fails, the unit does not store relays state selected by RS- 485 interface.
turn on the delay time, the relay is turned on with delay equal "t on" if the input
value exceeds the appropriate border value (defined with threshold and
"t on"
hysteresis), "t on" time. "t on" range 0 ÷ 99.9, defined with 0.1 sec. resolution. Unit of
this parameter is set by "unit" parameter.
turn off delay time, the relay is turned off with delay equal "toFF" if the input value
exceeds appropriate border value (defined with threshold and hysteresis), "toFF"
"toFF"
time. "toFF" range 0 ÷ 99.9, defined with 0.1 sec. resolution. Unit of this parameter is
set by "unit" parameter.
If time when the input signal exceeds some border value and is shorter than the "t on" or "toFF"
time, the relay does not change is state (see paragraph: CONTROL OF THE RELAY OUTPUTS).
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