Arthur Grillo DS200 Manual de instalação e operação - Página 13
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Three menu items, which influence the switching behavior of the open collector
output, follow the „limit switch" menu item:
1. "alarm delay time" with this menu item the switching delay time can be set. The
setting range is 1...60 s or 2...15 min. In the basic state, this value is set to 10 seconds
2. "switching logic" here you have the possibility to set the limit values to MAX or
MIN. At MAX, an alarm is triggered, when the measured value exceeds the limit value;
at MIN, the alarm is triggered when the limit value is exceeded.
3. "Contact logic" the rest state or the switching state of the open collector output
can be set differently. "Active high" means that when an alarm occurs, the open col-
lector output becomes low-impedance. "Active low" means that the alarm switches
the open collector output high-impedance
The following switching pattern can be summarized:
switching
contact
logic
logic
active
MAX
high
active
MAX
low
active
MIN
high
active
MIN
low
The output is subject to the following logic with regard to hysteresis and the set
switching delay time:
Alarm ON, low resistance
MAX
switching
Alarm OFF, high resistance
logic:
Alarm ON, low resistance
MIN
switching
Alarm OFF, high resistance
logic:
pressure
ΔP > limit value alarm ON, low resistance
ΔP < limit value alarm OFF, high resistance
ΔP > limit value alarm ON, high resistance
ΔP < limit value alarm OFF, low resistance
ΔP > limit value alarm OFF, high resistance
ΔP < limit value alarm ON, low resistance
ΔP > limit value alarm OFF, low resistance
ΔP < limit value alarm ON, high resistance
•
if ΔP > limit value for set switching delay time
•
if ΔP < 0,95 x limit value for set switching delay time
•
if ΔP < limit value for set switching delay time
•
if ΔP > 1,05 x limit value for set switching delay time
Doc.-no.: DS200_01_EN
alarm output
Issue: 05/2017
OPERATION
display
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