Parameters - Emerson XEV22D Installation And Operation Manual

10 Parameters

NOTE: All pressure parameters are relatives or absolutes depending on the PrM parameter.
Code Description
Kind of gas
Fty
Probe error opening percentage
PEo
Probe error delay before stop-
PEd
ping regulation
Type of stepper motor
tEU
Predefined valve selection
tEP
Kind of motor movement:
HFS
Minimum number of steps
LSt
Table 10-1 - List of Parameters
12 • XEV22D I&O Manual
REGULATION
(R22, 134, 404, 407, 410, 507, CO2)
Type of gas used by plant. Fundamental parameter for correct function-
ing of all systems.
(0 to 100%)
If a temporary probe error occurs, valve opening percentage is PEo until
PEd time is elapsed. If PEo is different from 0, it ensures cooling also
with probe error, because even if the device cannot calculate superheat,
the valve can work at PEo percentage.
(0 to 239 sec – 240 = On = unlimited)
If the probe error duration is bigger than PEd, valve closes completely.
The Pf message is displayed. If PEd = On, valve opening is PEo until
probe error finishes.
(uP- bP)
Selects the kind of valve.
uP = 5 to 6 wires unipolar valves
bP = 4 wires bipolar valves
CAUTION! By changing this parameter, the valve has to be re-initial-
ized.
(0 to 13)
If tEP = 0, the user has to modify all the parameters of configuration in
order to use the valve. If tEP is different from 0, the controller performs
a fast configuration of the following parameters: LSt, Ust, Sr, CPP, and
CHd. To select the correct value, refer to Table 6-1.
If tEP is different from 0, previous configuration of LSt, Ust, Sr, CPP,
and CHd are overwritten.
(HAF; FUL)
• HAF = half step. Use this setting for the unipolar valve.
• FUL = half step. Use this setting for the bipolar valve.
(0 to Ust)
Selects the minimum number of steps. At this number of steps, the valve
should be closed. Read the manufacturer datasheet to set this parameter
correctly. The number of steps should be set within the advised range of
functioning.
CAUTION! When this parameter is changed, the valve must be re-ini-
tialized. The controller performs this procedure automatically and re-
starts its normal functioning when the programming mode ends.
Function
026-1206 Rev 3 13-DEC-2012