DOTECH EVC10B-00 Manual do utilizador - Página 8

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: TRIP / ALARM MESSAGE

Cods

Description

POP

Pressure sensor disconnection

PST

Pressure sensor Short circuit

TOP

Pressure sensor disconnection

TST

Pressure sensor Short circuit

Detect MOP temperature

MOP

Detect lower limit Pressure alarm

LOP

Detect high Superheat alarm

HSH

Detect low superheat alarm

LSH

Detect freezing Protection alarm

FRE

※ Alarm which is flickering needs to reset by manual.

※ Press PRG/RST button two times quickly. Auxiliary relay (RL1) will be outputted if alarm is occurred. (In case of setting for alarm output relay)

Communication Protocol

: Specifications of communication

Item

Description

Transmission line connection

Multiple line

Communications method

RS485 (2-wire, half-duplex)

Baud-rate

BPS default 9600 BPS

Parity, Data, Stop bit

None, 8 Data, 1 Stop

Protocol Type

Modbus RTU MODE

Function Code

Read HOLD REGISTERS (0x03) / Preset Single Register (0x06)

Maximum Read Word

32 Word

Media Type

BELDEN 9841 / 9842, LG LIREV-AMESB

Poll interval

100msec

: STATUS - Communication Table

Address

Function

4 0073

EEV compulsory open ratio(※1)

4 0099

Reset command

4 0101

Run / Stop input (※2)

4 0102

Operation status

Bit0

Operation status of EEV

Bit1

Aux. relay output

4 0110

Alarm status

Bit0

Press. sensor disconnection

Bit1

Press. sensor short circuit

Bit2

Temp. sensor disconnection

Bit3

Temp. sensor short circuit

Bit4

MOP alarm

Bit5

Lower limit pressure alarm

Bit6

High superheat alarm

Bit7

Low superheat alarm

Bit8

Freezing protection alarm

4 0111

Present Superheat

4 0112

Present saturation temperature

4 0113

Present pressure

4 0114

Present temperature

4 0116

EEV open ratio

(※1) Manual control of EEV by communication

Electronic expansion valve will be controlled manually regardless of superheat of present system just by using 0.0 to 100.0% of UCR (electronic expansion valve compulsory open ration)

To lift a UCR (electronic expansion valve compulsory open ration), please input '1' at 4 0073. Then it will be converted into automatic control mode.

But, electronic expansion valve will be closed automatically at the status of stop or alarm

(※2) Run / Stop by communication

※ RMT(Run/Stop) : It will be run or stopped by input of 4 0101 only if run / stop method should be set to communication (2)

Parameter

If pressure sensor is disconnected

If pressure sensor is short circuited

If temperature sensor is disconnected

If temperature sensor is short circuited

MP= 1

If present pressure remains higher than set value of MOP

MP= 2 (Flickering)

during MPD (MOP alarm detection delay time)

LP= 1

If present pressure remains lower than set value of LOP

LP = 2 (Flickering)

during LDP (Low limit pressure alarm delay time)

HS= 1

If present super heat remains higher than set value of HSH

during HSD (High superheat alarm delay time)

HS = 2(Flickering)

LS= 1

If present super heat remains lower than set value of LSH

LS = 2(Flickering)

during LSD (Low superheat alarm delay time)

FR= 1

If present temperature remains lower than set value of FRE

FR= 2(Flickering)

during FRD (Freezing protection alarm delay time)

Unit

Type

Analog

Digital

Analog

Digital

Analog

℃

Analog

bar

Analog

℃

Analog

Conditions for occurrence

Size (Word)

EVC10B

INT 16

0.0 - 100.0

INT 16

0 : OFF

INT 16

0 : Stop

INT 16

Bit

0 : OFF

Bit

0 : OFF

INT 16

Bit

0 : OFF

Bit

0 : OFF

Bit

0 : OFF

Bit

0 : OFF

Bit

0 : OFF

Bit

0 : OFF

Bit

0 : OFF

Bit

0 : OFF

Bit

0 : OFF

INT 16

-1.0 ~ 1.0

INT 16

-100.0 　 100.0

INT 16

0.0 - 100.0

-8-

Ways to clear

If pressure sensor is normal

If temperature sensor is normal

System check is needed

It becomes a clear condition if present pressure value is less

than set value of MPF

It will be caused by lack of refrigerant.

It becomes a clear condition if present pressure is more than

set value of LPF

System check is needed

It becomes a clear condition if preset super heat is less than

set value of HSF

System check is needed

It becomes a clear condition if present super heat is more

than set value of LSF

Evaporator temperature is low. System check is needed It

becomes a clear condition if present temperature is more

than set value of FRF.

MMI

X 10

1 : ON

1 : Run

Refer to below bit

1 : ON

Refer to below bit

1 : ON

X 10

EVC10B R20140821