LOW LIMIT OPERATION
LOW LIMIT OPERATION
If Lo. is selected for OUT1, the unit will perform low limit control. When power
is applied the OUT1 relay is de-energized. After 6.5 seconds self-test period,
if the process is above the low limit set point (LSP1), the output 1 relay will be
energized and OP1 indicator will go off. If the process goes below the low
limit set point, the relay will be de-energized, the OP1 indicator will go on
and the display will show the process value. After the process rises above
the low limit set point and the RESET key is pressed or the remote reset input
is applied, the relay will be energized and the OP1 indicator will go off.
NOTE: Hysteresis is safe-sided.
LSP1+O1.HY
LSP1
ON
OFF
OUT1 Relay
A, B ,C=Reset is applied
O1.HY= Output1 hysteresis
Figure 1-5 Low Limit Operation
Figure 1-5 Low Limit Operation
A
B
C
14
UM L91-Rev 8
