Emerson XEV22D Installation And Operation Manual page 20

Driver for stepper electronic expansion valves
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Code
Description
Band offset
rS
(-12.0 to 12.0°C / -21to21°F)
PI band offset. It moves the pro-
portional band of the PI. With
rS = 0, the band is between Set
to Set + Pb.
Integration time
InC
Type of pressure transducer
tPP
Enable pressure probe sending
LPP
in LAN
Probe value At 4mA or At 0V
PA4
Probe value 20mA or At 5V
P20
Pressure probe calibration
OPr
Type of temperature probe
ttE
Temperature probe calibration
otE
Digital input 1 (free of voltage)
i1P
digital input polarity
Digital input 1 (free of voltage)
i1F
digital input function
Digital input 1 (free of voltage)
d1d
activation delay
Digital input 2 (high voltage)
i2P
digital input polarity
Digital input 2 (high voltage)
i2F
digital input function
Digital input 2 (high voltage)
d2d
activation delay
Alarm delay after restarting reg-
dAo
ulation
Table 10-1 - List of Parameters
14 • XEV22D I&O Manual
(0 to 255 sec)
PI integration time
PROBE PARAMETERS
(420 – 5V – LAn)
Sets the type of pressure transducer to use: 420 = 4 to 20mA pressure
transducer; 5V = 0 to 5V ratiometric transducer; LAn = the pressure sig-
nal comes from another XEV module.
(n to Y)
If LPP = Y, the value of pressure read by device is sent in LAN. Only
one device of the LAN can have LPP = Y.
(-1.0 to P20 bar/ -14 to PSI)
Pressure value measured by probe at 4mA or at 0V (related to PrM pa-
rameter).
(PA4 to 50.0 bar/ 725 psi)
Pressure value measured by probe at 20mA or at 5V (related to PrM pa-
rameter).
(-12.0 to 12.0 bar/ -174 to 174 psi)
(PtM to ntC)
Sets the kind of probe used by the controller: PtM = Pt1000, ntC = NTC
probe.
(-12.0 to 12.0°C/ -21 to 21°F)
DIGITAL INPUTS
(CL, OP)
CL = activated when closed; OP = activated when opened
(CCL, rL)
CCL = cooling call; rL = digital input activates relay
(0 to 255 min)
This activation delay is used only if digital input is configured as rL.
(CL,OP)
CL = activated when closed; OP = activated when opened
(CCL, rL)
CCL = cooling call; rL = digital input activates relay
(0 to 255 min)
This activation delay is used only if digital input is configured as rL.
ALARM
(0.0 to 42.0 min: tens of seconds)
Time between digital input activation (configured as CCL) and alarm
signaling. The LSH alarm is always signaled also during this time.
Function
026-1206 Rev 3 13-DEC-2012

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