DOTECH EVC10B Series, Руководство пользователя, Страница: 8 / 8

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EVC10B R20140821
: TRIP / ALARM MESSAGE
※ 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)
6. 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
(※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)
Cods Description Parameter Conditions for occurrence Ways to clear
POP Pressure sensor disconnection - If pressure sensor is disconnected
If pressure sensor is normal
PST
Pressure sensor Short circuit - If pressure sensor is short circuited
TOP Pressure sensor disconnection - If temperature sensor is disconnected
If temperature sensor is normal
TST Pressure sensor Short circuit - If temperature sensor is short circuited
MOP Detect MOP temperature
MP
= 1
If present pressure remains higher than set value of MOP
during MPD (MOP alarm detection delay time)
System check is needed
It becomes a clear condition if present pressure value is less
than set value of MPF
MP
= 2 (
Flickering)
LOP
Detect lower limit Pressure alarm
LP
= 1
If present pressure remains lower than set value of LOP
during LDP (Low limit pressure alarm delay time)
It will be caused by lack of refrigerant.
It becomes a clear condition if present pressure is more than
set value of LPF
LP
= 2 ( Flickering)
HSH
Detect high Superheat alarm
HS
= 1
If present super heat remains higher than set value of HSH
during HSD (High superheat alarm delay time)
System check is needed
It becomes a clear condition if preset super heat is less than
set value of HSF
HS
= 2( Flickering)
LSH Detect low superheat alarm
LS
= 1
If present super heat remains lower than set value of LSH
during LSD (Low superheat alarm delay time)
System check is needed
It becomes a clear condition if present super heat is more
than set value of LSF
LS
= 2( Flickering)
FRE Detect freezing Protection alarm
FR
= 1
If present temperature remains lower than set value of FRE
during FRD (Freezing protection alarm delay time)
Evaporator temperature is low. System check is needed It
becomes a clear condition if present temperature is more
than set value of FRF.
FR
= 2(
Flickering)
Address Function Unit Type Size (Word) EVC10B MMI
4 0073 EEV compulsory open ratio(※1) % Analog INT 16 0.0 - 100.0 X 10
4 0099 Reset command - Analog INT 16 0 : OFF 1 : ON
4 0101 Run / Stop input (※2) - Analog INT 16 0 : Stop 1 : Run
4 0102 Operation status - Analog INT 16 Refer to below bit
Bit0 Operation status of EEV - Digital Bit 0 : OFF 1 : ON
Bit1 Aux. relay output - Digital Bit 0 : OFF 1 : ON
4 0110 Alarm status - Analog INT 16 Refer to below bit
Bit0 Press. sensor disconnection - Digital Bit 0 : OFF 1 : ON
Bit1 Press. sensor short circuit - Digital Bit 0 : OFF 1 : ON
Bit2 Temp. sensor disconnection - Digital Bit 0 : OFF 1 : ON
Bit3 Temp. sensor short circuit - Digital Bit 0 : OFF 1 : ON
Bit4 MOP alarm - Digital Bit 0 : OFF 1 : ON
Bit5 Lower limit pressure alarm - Digital Bit 0 : OFF 1 : ON
Bit6 High superheat alarm - Digital Bit 0 : OFF 1 : ON
Bit7 Low superheat alarm - Digital Bit 0 : OFF 1 : ON
Bit8 Freezing protection alarm - Digital Bit 0 : OFF 1 : ON
4 0111 Present Superheat K Analog INT 16 X 10
4 0112 Present saturation temperature ℃ Analog INT 16 X 10
4 0113 Present pressure bar Analog INT 16 -1.0 ~ 1.0 X 10
4 0114 Present temperature ℃ Analog INT 16 -100.0 ㅤ 100.0 X 10
4 0116 EEV open ratio % Analog INT 16 0.0 - 100.0 X 10