Emerson XEV22D Spezifikationen PDF herunterladen (Seite 16)

10 • XEV22D I&O Manual 026-1206 Rev 0 09-FEB-2011

tPP Type of pressure transducer (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.

LPP Enable pressure probe sending in

LAN

(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.

PA4 Probe value At 4mA or At 0V (-1.0 to P20 bar/ -14 to PSI)

Pressure value measured by probe at 4mA or at 0V (related to PrM pa-

rameter).

P20 Probe value 20mA or At 5V (PA4 to 50.0 bar/ 725 psi)

Pressure value measured by probe at 20mA or at 5V (related to PrM pa-

rameter).

OPr Pressure probe calibration (-12.0 to 12.0 bar/ -174 to 174 psi)

ttE Type of temperature probe (PtM to ntC)

Sets the kind of probe used by the controller: PtM = Pt1000, ntC = NTC

probe.

otE Temperature probe calibration (-12.0 to 12.0°C/ -21 to 21°F)

DIGITAL INPUTS

i1P Digital input 1 (free of voltage)

digital input polarity

(CL, OP)

CL = activated when closed; OP = activated when opened

i1F Digital input 1 (free of voltage)

digital input function

(CCL, rL)

CCL = cooling call; rL = digital input activates relay

d1d Digital input 1 (free of voltage)

activation delay

(0 to 255 min)

This activation delay is used only if digital input is configured as rL.

i2P Digital input 2 (high voltage) dig-

ital input polarity

(CL,OP)

CL = activated when closed; OP = activated when opened

i2F Digital input 2 (high voltage) dig-

ital input function

(CCL, rL)

CCL = cooling call; rL = digital input activates relay

d2d Digital input 2 (high voltage) ac-

tivation delay

(0 to 255 min)

This activation delay is used only if digital input is configured as rL.

ALARM

dAo Alarm delay after restarting regu-

lation

(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.

tdA Type of alarm signaled by relay (ALL, SH, PrE, di)

ALL = all alarm; SH = superheat alarm; PrE = pressure alarm; di = ac-

tivation only when digital input configured as rL is activated.

LPL Lower pressure limit for super-

heat regulation

(PA4 to P20 bar/ psi)

When the suction pressure comes down to LPL, the regulation is per-

formed with a LPL fixed value for pressure; when the pressure comes

back to LPL, the normal pressure value is used. (related to PrM param-

eter).

MOP Maximum operating pressure

threshold

(PA4 to P20 bar/ psi)

If the suction pressure exceeds the maximum operating pressure value,

the controller signals a condition with a High Pressure alarm LED (re-

lated to PrM parameter).

Code Description Function

Table 8-1 - List of Parameters

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 29 30

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