Chapter 4 ________________________________________________________________ Operation
VAISALA ______________________________________________________________________ 135
7.
Select Hysteresis Press
SET
. Set the hysteresis by using the arrow
buttons. Press
OK
.
8.
Select Relay enable, press
ON/OFF
to enable/disable the relay.
RSEL
Use the serial line to select the quantity, setpoints and hysteresis or
enable/disable the relay outputs. Enter the
RSEL
command.
RSEL
[
q1 q2 q3 q4
]<cr>
where
q1
= Quantity for the relay 1 or Fault/Online
q2
= Quantity for the relay 2 or Fault/Online
q3
= Quantity for the relay 3 or Fault/Online
q4
= Quantity for the relay 4 or Fault/Online
Factory setting: All relays disabled. Use the quantity abbreviations
presented above. See Table 2 on page 17 and Table 3 on page 18.
Example of window limit switch (upper and lower setpoints for control
parameter): Selecting relay 1 to follow dewpoint/frost point temperature
measurement and relay 2 to follow temperature measurement. Two relay
setpoints are set for both relays.
>
rsel tdf t
Rel1 Tdf above: - ?
-10
Rel1 Tdf below: - ?
-30
Rel1 Tdf hyst : 0.00 'C ?
5
Rel1 Tdf enabl: OFF ?
on
Rel2 T above: - ?
30
Rel2 T below: - ?
20
Rel2 T hyst : 0.00 'C ?
1
Rel2 T enabl: OFF ?
on
>
