LAUREL LTS, Руководство пользователя

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SETTING UP RELAY ALARMS OPERATION
Dual AC/DC solid state relays rated 120 mA are standard for alarm or setpoint control and are
independently set up via the “Relay Alarms” tab. Set “Alarm Source” to “Item 3” as illustrated.
For online help with any data entry field, press the
F1
key.
•
Setpoint. The number to which the current reading is compared if deviation is set to zero. The
reading is the count in engineering units that is transmitted digitally and is also used for analog
output. For example, if the transmitted reading is in gallons/minute, the setpoint will be
referenced to that reading, not to the raw pulse rate sent from a turbine flow meter.
Time
1000
D
ig
it
a
l
R
e
a
d
in
g
Setpoint
OFF OFF
ON
Time
1000
Setpoint
OFF
ON ON
D
ig
it
a
l
R
e
a
d
in
g
“Active High” On/Off setpoint control
with deviation =0
“Active Low” On/Off setpoint control
with deviation = 0