General Information
The EXD-HP1/2 are autonomous universal controllers for overheat and/or economizer control in heat pumps, heating systems, air conditioning systems, and precise temperature maintenance systems.
Characteristics
- Self-tuning of overheat and/or economizer control when operating with EMERSON EXM/EXL expansion valves or EXN with stepper motor.
- Discharge temperature control using steam injection or refrigerant wet vapor injection into the compressor.
- EXD-HP1: Controller for single valve control.
- EXD-HP2: Controller for dual valve control.
- Ability to communicate with a system controller via Modbus network (RTU mode). All data (read/write) is accessible to a third-party controller with Modbus (RTU) communication.
- Upload/download key, allowing copying of configuration parameters from one controller to another.
- Low-pressure protection and freeze protection.
- Manual valve positioning.
- Boiling pressure limitation (MOP).
- High/low overheat alarm signal.
- Monitoring of sensors and wires, detection of sensor failures and wire breaks.
- Built-in display (3 digits, LEDs) and keypad.
- Electrical connections via screw terminals (included with the controller).
- OEM product: order in boxes of 20 pieces (OEM packaging).
Technical Data
Models
| Model | General Information | Order Number (OEM Packaging) | Individual Packaging |
| CONTROLLER | |||
| EXD-HP1 | For single valve control | 807836M (20 pcs) | - |
| EXD-HP2 | For dual valve control | 807837M (20 pcs) | - |
Accessories
Valves / Coils
| Model | General Information | Order Number (OEM Packaging) | Individual Packaging |
| EXM-BOA | Electronic expansion valve | 800399M | - |
| EXM-BOB | 800400M | - | |
| EXM-BOD | 800401M | - | |
| EXM-BOE | 800402M | - | |
| EXM-125 | 12V DC coil | 800403M | - |
| EXL-B1F | Electronic expansion valve | 800405M | - |
| EXL-B1G | 800406M | - | |
| EXL-125 | 12V DC coil | 800407M | - |
| EXN-B2K | Electronic expansion valve (not selected when working with R454A) | - | 800421 |
| EXN-B2L | - | 800422 | |
| EXN-125 | 12V DC coil | 800420 | - |
Temperature Sensors
| Model | General Information | Order Number (OEM Packaging) | Individual Packaging |
| ECP-P30 | Temperature sensor with 3m cable | 804495 | - |
Pressure Sensors - 7/16-20 UNF threaded connection
| Model | General Information | Order Number (OEM Packaging) | Individual Packaging |
| (25/20 pcs per pack) | |||
| PT5N-07M / PT5-07M | -0.8...7 bar | 805350M/802350M | 805350/805380 |
| PT5N-18M / PT5-18M | 0...18 bar | 805351M/802351M | 805351/802351 |
| PT5N-30M / PT5-30M | 0...30 bar | 805352M/802352M | 805352/802352 |
Pressure Sensors - Solder connection
| Model | General Information | Order Number (OEM Packaging) | Individual Packaging |
| (25/10 pcs per pack) | |||
| PT5N-07T/PT5-07T | -0.8...7 bar | 805380M/802380M | 805380/802380 |
| PT5N-07P-FLR | -0.8...7 bar | 805390M | 805390 |
| PT5N-10P-FLR | -0.8...10 bar | 805391M | 805391 |
| PT5N-18T/PT5-18T | 0...18 bar | 805381M/802381M | 805381/802381 |
| PT5N-30T/ PT5-30T | 0...30 bar | 805382M/802382M | 805382/802382 |
| PT5N-30P-FLR | 0...30 bar | 805389M | 805389 |
| PT5-30L-FLR | 0...30 bar, molded cable | 802389M | 802389 |
Connectors and Cables for Pressure Sensors
| Model | General Information | Order Number (OEM Packaging) | Individual Packaging |
| (20 pcs per pack) | |||
| PT4-M15 | 1.5 m cable | 804803M | 804803 |
| PT4-M30 | 3.0 m cable | 804804M | 804804 |
| PT4-M60 | 6.0 m cable | 804805M | 804805 |
| PT4-M60-FLR* | 6.0 m cable, 2-wire, ATEX standard | - | 804806 |
| *) Mandatory for PT5N-...-FLR, PT5 with molded cable. Detailed information on EXM/EXL, EXN and PT5(N) can be found in the respective Technical Information. For selection assistance, contact Emerson representatives in your country. | |||
Alarm Table
| Condition | Delay | Alarm Relay | Valve Position | Return | Alarm LEDs |
| Sensor failure | Tripped | 100% closed | Auto | ON | |
| Step motor failure | Tripped | Auto | ON | ||
| Low overheat | Fixed: 1 min. | Tripped | 100% closed | Auto/Manual | ON / Flashing |
| High discharge temp. | Fixed: 30 sec. | Tripped | Operating | Auto | ON |
| High overheat | Adjustable | Tripped | Operating | Auto | ON |
| Low pressure | Adjustable | Tripped | Operating | Auto/Manual | ON / Flashing |
| Freezing | Adjustable | Tripped | 100% closed | Auto/Manual | ON / Flashing |
Technical Data
Power Supply & Consumption
| Parameter | Value |
| Power Supply | 24 V AC/DC ±10% |
| Power Consumption | EXD-HP1: Max. 15 VA EXD-HP2: Max. 20 VA |
Inputs & Outputs
| Parameter | Value |
| Digital Inputs | EXD-HP1: Two, dry contacts EXD-HP2: Three, dry contacts |
| Relay Output | SPDT contacts, AgSnO coating |
| Inductive Load (AC15) | 24 V AC: 1 A |
| Resistive Load | 24 V AC/DC: 4 A |
| Actuator Type | 1 B |
| Nominal Impulse Voltage | 0.5 kV |
Enclosure & Environment
| Parameter | Value |
| Terminals | Removable screw terminals for wires 0.14...1.5 mm² |
| Degree of Protection | 2 |
| Enclosure Class (EN 60529) | IP20 |
| Weight | 175 g |
| Max. Relative Humidity | 0...85% RH without condensation |
Housing & Mounting
| Parameter | Value |
| Housing | Self-extinguishing ABS |
| Mounting | On DIN rail |
Compatible Refrigerants
| Group | Refrigerants |
| Group II | R22, R134a, R410A, R407C, R448A, R449A, R452A, R1234ze* |
| Group I | R32, R454A*, R454B, R1234yf |
| Group III | R290 |
| * A2L according to ASHRAE. Refrigerant Group according to PED 2014/68/EU. | |
Operating Conditions
| Parameter | Value |
| Storage Temperature | -20...+65 °C |
| Operation Temperature | -10...+60 °C |
Applicable Directives / Standards
LVD, EMC, RoHS, DIN EN 60335-1, DIN EN 55014-1, DIN EN 55014-2
Marking
CE, EAC
Description
| Parameter | Specification |
| Temperature Sensor Input | ECP-P30 (3m cable). Operating range: -30°C...+150°C. |
| Pressure Sensor Input | PT5N / PT5. Signal: 4...20 mA. |
| Stepper Motor Actuator Output | For controlling expansion valves. NOTE: Connecting 2 valves as per table. Contour 1: EXM or EXL. Contour 2: EXM or EXL. Valves: EXM/L or EXN. |
Dimensions (mm)
The diagram shows a rectangular device with a width of approximately 70mm, a height of 117.5mm, and a depth of 110mm. It features terminal blocks and a display/keypad area.
Maximum Operating Pressure (MOP) Table
| Refrigerant | Min (°C) | Max (°C) | Default (°C) | Function |
| R22 | -40 | +50 | +15 °C | Overheat control |
| R134a | -40 | +66 | +15 °C | Overheat control |
| R410A | -40 | +45 | +15 °C | Overheat control and economizer control |
| R32 | -40 | +30 | +15 °C | Overheat control and economizer control |
| R407C | -40 | +48 | +15 °C | Overheat control and economizer control |
| R290 | -40 | +50 | +15 °C | Overheat control |
| R448A | -57 | +66 | +12 °C | Overheat control |
| R449A | -57 | +66 | +12 °C | Overheat control |
| R452A | -45 | +66 | +15 °C | Overheat control |
| R454A* | -57 | +66 | +10 °C | Overheat control |
| R454B | -40 | +45 | +18 °C | Overheat control |
| R454C | -66 | +48 | +17 °C | Overheat control |
| R513A | -57 | +66 | +13 °C | Overheat control |
| R452B | -45 | +66 | +25 °C | Overheat control |
| R1234ze | -57 | +66 | +24 °C | Overheat control |
| R1234yf | -52 | +66 | +15 °C | Overheat control |
| * EXN valves are not produced. | ||||
Wiring Diagrams
❗ WARNING ❗ - Flammable Refrigerants: EXD-HP1/2 are potential ignition sources and do not comply with ATEX requirements. Installation only in explosion-proof environments. Use only approved valves and cables for flammable refrigerants!
EXD-HP1 and EXD-HP2 (Main Terminal Block)
This diagram shows the main terminal block layout. Key terminals include: DI1, DI3 (Digital Inputs), RS485 (Modbus communication), U24VAC/DC (Power Supply), and connections for ECP-P30 (Temperature Sensor) and PT5(N) (Pressure Sensor). The diagram illustrates the physical arrangement of these terminals.
EXD-HP2 (Upper Terminal Block)
This diagram illustrates the upper terminal block specifically for the EXD-HP2 model. It is noted that this board is primarily for overheat control functions and may not be required if Contour 2 is not utilized.
The main board is intended for overheat or economizer control functions. The alarm relay is a dry contact. The relay coil is not energized during an alarm or power failure. The hot gas discharge temperature input is mandatory only for the economizer control function. The transformer must be Class 2. The upper board is only for overheat control function. It is not necessary to connect the upper board if contour 2 is not used.
Modbus Connection and Protocol Details
Communication with other systems is optional, but connection with higher-level controllers (from other manufacturers) is possible for data and command transmission, as well as for data logging.
Bus Topology
The EXD-HP1/2 controller acts as a slave device, and the controller from another manufacturer acts as a master. If multiple EXD-HP1/2 are connected to a master device, each device must have a unique address for proper operation.
Diagram shows a Master/Slave bus topology with two EXD-HP units connected via RS485, with 120 Ohm termination resistors at each end.
Modbus Protocol Details
- Operating Mode: RTU (Remote Terminal Unit).
- Slave Controller Addresses: 1 to 127 (Adr).
- Baud Rate: 9600 bps, 19200 bps (br).
- Start Bit: 1.
- Data Bits: 8.
- Parity: Even (default), None (PAr).
- Stop Bit: 1.
- Master Controller Response Delay: 500 ms.
Modbus Data Transfer
Modbus Register Addresses
- Read-Only Data: Start Address: 0x0100 (256).
- Writable Data: Start Address: 0x0200 (512).
- Configuration Data: Start Address: 0x0300 (768).
Data Transfer on Read (Function Code 03)
| Request | Value |
| Function Code | 0x03 |
| Start Address | 0x0000 - 0xFFFF |
| Number of Registers | 1 - 125 (0x7D) |
| Response | Value |
| Function Code | 0x03 |
| Byte Count | 1 byte |
| Holding Registers | N * 2 bytes |
| Error | Value |
| Error Code | 0x83 |
| Exception Code | 01 = Function code not supported 02 = Start address or number of registers out of allowed range 03 = Number of registers out of allowed range |
Data Transfer on Write (Single Register - Function Code 06)
| Request | Value |
| Function Code | 0x06 |
| Start Address | 0x0000 - 0xFFFF |
| Value | 0x0000 - 0xFFFF |
| Response | Value |
| Function Code | 0x06 |
| Start Address | 0x0000 - 0xFFFF |
| Value | 0x0000 - 0xFFFF |
| Error | Value |
| Error Code | 0x86 |
| Exception Code | 01 = Function code not supported 02 = Start address out of allowed range |
Data Transfer on Write (Multiple Registers - Function Code 16)
| Request | Value |
| Function Code | 0x10 |
| Start Address | 0x0000 - 0xFFFF |
| Number of Registers | 0x0001 - 0x0078 |
| Byte Count | 2 x N |
| Register Values | N * 2 bytes |
| Response | Value |
| Function Code | 0x10 |
| Start Address | 0x0000 - 0xFFFF |
| Number of Registers | 0x0001 - 0x0078 |
| Error | Value |
| Error Code | 0x90 |
| Exception Code | 01 = Function code not supported 02 = Invalid register address 03 = Register value out of allowed range |
Writable Variables EXD-HP1/2
| Modbus Address | Display Code | Description | Unit | Default | Remarks |
| 512/0x0200 | 1Ho | Manual mode, Contour 1 | - | 0 = off, 1 = on | Operates only if manual mode is enabled. |
| 513/0x0201 | 1HP | Manual valve opening, Contour 1 | % | - | 1 = enabled (all parameters default) |
| 514/0x0202 | - | (when DI1 is off) | - | - | |
| 515/0x0203 | - | Digital Outputs | - | - | 0x0001 = alarm relay |
| 516/0x0204 | - | Manual alarm reset command | - | - | 0x0001 = alarm reset |
| 517/0x0205 | 2Ho | Manual mode, Contour 2 (for EXD-HP2) | - | 0 = off, 1 = on | Operates only if manual mode is enabled. |
| 518/0x0206 | 2HP | Manual valve opening, Contour 2 (for EXD-HP2) | % | - | |
| 519/0x0207 | - | Discharge temperature input | 1/100°C | - | Input for discharge temperature, if parameter 1EC (0x31B) = 1. Range 0...160°C. Min. update rate: 2 sec. |
| 520/0x0208 | - | Discharge temperature control | - | - | |
| 521/0x0209 | - | Contour 1 request | - | 0 = not allowed, 1 = allowed | |
| 522/0x020A | - | Contour 2 request | - | 0 = not allowed, 1 = allowed | |
| 523/0x020B | - | Manual defrost Contour 1 | - | 0 = off, 1 = on | |
| 524/0x020C | - | Valve opening during manual defrost, Contour 1 | % | - | Active only during manual defrost, Contour 1 = ON |
| 525/0x020D | - | Manual defrost Contour 2 | - | 0 = off, 1 = on | |
| 526/0x020E | - | Valve opening during manual defrost, Contour 2 | % | - | Active only during manual defrost, Contour 2 = ON |
Read-Only Variables EXD-HP1/2
| Modbus Address | Display Code | Description | Unit | Remarks |
| 256/0x100 | 1Ho | Valve opening – Contour 1 | 1/100% | 0 = no request, 1 = request |
| 257/0x101 | - | Digital Input – Contour 1 | - | |
| 258/0x102 | - | Digital Outputs | - | 0x0001 = alarm relay |
| 259/0x103 | - | Pressure sensor 1 – Contour 1 | 1/100 bar | |
| 260/0x104 | - | Temperature sensor 1 – Contour 1 | 1/100°C | |
| 261/0x105 | - | Temperature sensor 3 – Contour 1 | 1/100°C | |
| 262/0x106 | - | Saturation temperature – Contour 1 | 1/100°C | |
| 263/0x107 | - | Pressure sensor failure 1 - Contour 1 | - | 0 = no error, 1 = error |
| 264/0x108 | - | Pressure sensor failure 1 - Contour 1 | - | 0 = no error, 1 = error |
| 265/0x109 | - | Pressure sensor failure 3 - Contour 1 | - | 0 = no error, 1 = error |
| 266/0x10A | - | Alarm signal set, Contour 1 | - | 0x0001 = Low pressure 0x0002 = Low overheat 0x0004 = High overheat 0x0008 = Freeze protection |
| 267/0x10B | - | Alarm signal set, Apparatus | - | 0x0001 = Valve 1 0x0002 = Valve 2 (for EXD-HP2) 0x0004 = Pressure sensor 1 0x0008 = Pressure sensor 2 (for EXD-HP2) 0x0010 = Temperature sensor 1 0x0020 = Temperature sensor 2 (for EXD-HP2) 0x0040 = Temperature sensor 3 |
| 268/0x10C | - | Overall status, Contour 1 | - | 0 = no request, 1 = request 2 = overheat control 3 = MOP control 4 = alarm status 5 = N/A 6 = manual mode |
| 269/0x10D | - | Overheat setpoint - Contour 1 | 1/10 K | |
| 270/0x10E | - | Measured/calculated overheat - Contour 1 | 1/10 K | |
| 271/0x10F | - | Software version (x104) | - | 16-bit format 1 digit for controller type: 1= HP1, 2 = HP2 1 digit for major revision 2 digits for minor revision |
| 272/0x110 | - | Valve opening – Contour 2 | 1/100% | 0 = no request, 1 = request |
| 273/0x111 | - | Digital Inputs – Contour 2 (for EXD-HP2) | - | 0 = no request, 1 = request |
| 274/0x112 | - | Pressure sensor 2 - Contour 2 | 1/100 bar | |
| 275/0x113 | - | Temperature sensor 2 - Contour 2 | 1/100 °C | |
| 276/0x114 | - | Saturation temperature 2 | 1/100 °C | |
| 277/0x115 | - | Pressure sensor failure 2, Contour 2 (for EXD-HP2) | - | 0 = no error, 1 = error |
| 278/0x116 | - | Temperature sensor failure 2, Contour 2 (for EXD-HP2) | - | 0 = no error, 1 = error |
| 279/0x117 | - | Overheat setpoint – Contour 2 | 1/100 K | |
| 280/0x118 | - | Measured/calculated overheat - Contour 2 | 1/100 K | |
| 281/0x119 | - | Digital Input DI3 | - | 0 = not used, 1 = overheat economizer control |
| 282/0x11A | - | Alarm signal set, Contour 2 | - | 0x0001 = low pressure 0x0002 = low overheat 0x0004 = high overheat 0x0008 = freeze protection |
| 283/0x11B | - | Overall status, Contour 2 | - | 0 = no request, 1 = request 2 = overheat control 4 = alarm status 3 = MOP control 5 = N/A 6 = manual mode |
Configuration Parameters EXD-HP1/2 (for both contours)
| 10-/16-bit Modbus Address | Display Code | Description | Unit | Default | Operating Range | Remarks |
| 768/0x300 | H5 | Password | - | 1 | 1-1999 | |
| 769/0x301 | Adr | Modbus Address | - | 1 | 1-127 | |
| 770/0x302 | br | Baud rate for Modbus | - | 0 | 0-1 | 0 = 9600 baud, 1 = 19200 baud |
| 771/0x303 | PAr | Modbus Parity | - | 0 | 0-1 | 0 = even parity, 1 = no parity |
| 772/0x304 | -C2 | Contour 2 disabled | - | 0 | 0-1 | 0 = Contour 2 enabled, 1 = Contour 2 disabled |
| 773/0x306 | -uC | Units of Measurement | - | 0 | 0-1 | 0 = °C, K, barg 1 = °F, psig Parameter only affects data display. SI units are used internally and for Modbus data transfer. |
| 774/0x305 | HP- | Display mode | - | 1 | 0-2 | 0 = no display, 1 = Contour 1, 2 = Contour 2 |
Parameters Contour 1
| Modbus Address | Display Code | Description | Unit | Default | Operating Range | Remarks |
| 775/0x307 | 1uE | Function | - | 1 | 0-1 | 0 = Overheat control 1 = Economizer control (R410A, R32, R407C) |
| 776/0x308 | 1u4 | Control mode, Contour 1 | - | 0 | 0-4 | 0 = Standard shell-and-tube heat exchanger 1 = Shell-and-tube heat exchanger with slow response 2 = Fixed PID 3 = Plate heat exchanger with fast response (not for 1uE = 1) 4 = Standard plate heat exchanger (not for 1uE = 1) |
| 777/0x309 | 1u0 | Refrigerant, Contour 1 | - | 2 | 0-15 | 0 = R22, 1 = R134a, 2 = R410A, 3 = R32, 4 = R407C, 5 = R290, 6 = R448A, 7 = R449A, 8 = R452A, 9 = R454A*, 10 = R454B, 11 = R454C, 12 = R513A, 13 = R452B, 14 = R1234ze, 15 = R1234yf * not for EXN |
| 778/0x30A | 1uP | Pressure sensor 1: type | - | 2 | 0-3 | 0 = PT5(N)-07..., 1 = PT5(N)-18..., 2 = PT5(N)-30..., 3 = PT5N-10P-FLR |
| 779/0x30B | 1uu | Initial valve opening 1 | % | 20 | 10-100 | |
| 780/0x30C | 1u9 | Duration of initial valve opening 1 | Sec. | 5 | 1-30 | |
| 781/0x30D | 1uL | Alarm mode for low overheat, Contour 1 | - | 1 | 0-2 | 0 = disabled, 1 = enabled, auto-return, 2 = enabled, manual return |
| 782/0x30E | 1u5 | Overheat setpoint, Contour 1 | 1/10 K | 6 | 0-2 | Range = 3-30K with 1uL = 1,2 Range = 0.5-30K with 1uL = 0 |
| 783/0x30F | 1u2 | MOP mode, Contour 1 | - | 1 | 0-1 | 0 = disabled, 1 = enabled |
| 784/0x310 | 1u3 | MOP saturation temperature, Contour 1 | 1/10°C | - | See MOP table | |
| 785/0x311 | 1P9 | Alarm mode for low pressure, Contour 1 | - | 1 | 0-2 | 0 = disabled, 1 = enabled, auto-return, 2 = enabled, manual return |
| 786/0x312 | 1PA | Low pressure cutoff, Contour 1 | 1/10 bar | 0 | -0.8 -17.7 | |
| 787/0x313 | 1Pb | Low pressure cutoff delay, Contour 1 | Sec. | 5 | 5-199 | |
| 788/0x314 | 1Pd | Low pressure cutoff enable, Contour 1 | 1/10 bar | 0.5 | 0.5-18 | |
| 789/0x315 | 1P4 | Alarm mode for freezing, Contour 1 | - | 1 | 0-2 | 0 = disabled, 1 = enabled, auto-return, 2 = enabled, manual return |
| 790/0x316 | 1P2 | Freezing cutoff, Contour 1 | 1/10°C | 0 | -20-5 | |
| 791/0x317 | 1P5 | Freezing alarm delay, Contour 1 | Sec. | 30 | 5-199 | |
| 792/0x318 | 1P- | Overheat control, Contour 1 (fixed PID, Kp factor) | 1/10 | 1.0 | 0.1-10 | display 1/10K |
| 793/0x319 | 1i- | Overheat control, Contour 1 (fixed PID, Ti factor) | - | 100 | 1-350 | |
| 794/0x31A | 1d- | Overheat control, Contour 1 (fixed PID, Td factor) | 1/10 | 3.0 | 0.1-30 | display 1/10K |
| 795/0x31B | 1EC | Information source for discharge temperature | - | 0 | 0-1 | 0 = discharge temperature input (ECP-P30) 1 = Modbus command |
| 796/0x31C | 1PE | Economizer control, Contour 1 (fixed PID, Kp factor) | 1/10 | 2.0 | 0.1-10 | display 1/10K |
| 797/0x31D | 1iE | Economizer control, Contour 1 (fixed PID, Ti factor) | - | 100 | 1-350 | |
| 798/0x31E | 1dE | Economizer control, Contour 1 (fixed PID, Td factor) | 1/10 | 1.0 | 0.1-30 | display 1/10K |
| 799/0x31F | 1uH | Alarm mode for high overheat, Contour 1 | - | 0 | 0-1 | 0 = disabled, 1 = enabled, auto-return |
| 800/0x320 | 1uA | High overheat setpoint, Contour 1 | 1/10 K | 30 | 16-40 | |
| 801/0x321 | 1ud | High overheat alarm delay, Contour 1 | min. | 3 | 1-15 | |
| 802/0x322 | 1E2 | Discharge temperature correction | 1/10 K | 0 | 0-10 | Positive discharge temperature correction for sensor location. |
Parameters Contour 2
| Modbus Address | Display Code | Description | Unit | Default | Operating Range | Remarks |
| 803/0x323 | 2u4 | Control mode, Contour 2 | - | 0 | 0-4 | 0 = Standard shell-and-tube heat exchanger 1 = Shell-and-tube heat exchanger with slow response 2 = Fixed PID 3 = Plate heat exchanger with fast response (not for 1uE = 1) 4 = Standard plate heat exchanger (not for 1uE = 1) |
| 804/0x324 | 2u0 | Refrigerant, Contour 2 | - | 2 | 0-15 | 0 = R22, 1 = R134a, 2 = R410A, 3 = R32, 4 = R407C, 5 = R290, 6 = R448A, 7 = R449A, 8 = R452A, 9 = R454A*, 10 = R454B, 11 = R454C, 12 = R513A, 13 = R452B, 14 = R1234ze, 15 = R1234yf * not for EXN |
| 805/0x325 | 2uP | Pressure sensor 2: type | - | 1 | 0-3 | 0 = PT5(N)-07..., 1 = PT5(N)-18..., 2 = PT5(N)-30..., 3 = PT5N-10P-FLR |
| 806/0x326 | 2uu | Initial valve opening 2 | % | 20 | 10-100 | |
| 807/0x327 | 2u9 | Duration of initial valve opening 2 | Sec. | 5 | 1-30 | |
| 808/0x328 | 2uL | Alarm mode for low overheat, Contour 2 | - | 1 | 0-2 | 0 = disabled, 1 = enabled, auto-return, 2 = enabled, manual return |
| 809/0x329 | 2u5 | Overheat setpoint, Contour 2 | 1/10 K | 6 | - | Range = 3-30K with 2uL = 1,2 Range = 0.5-30K with 2uL = 0 |
| 810/0x32A | 2u2 | MOP mode, Contour 2 | - | 1 | 0-1 | 0 = disabled, 1 = enabled |
| 811/0x32B | 2u3 | MOP saturation temperature, Contour 2 | 1/10 °C | - | See MOP table | |
| 812/0x32C | 2P9 | Alarm mode for low pressure, Contour 2 | - | 1 | 0-2 | 0 = disabled, 1 = enabled, auto-return, 2 = enabled, manual return |
| 813/0x32D | 2PA | Low pressure cutoff, Contour 2 | 1/10 bar | 0 | -0.8 -17.7 | |
| 814/0x32E | 2Pb | Low pressure cutoff delay, Contour 2 | Sec. | 5 | 5-199 | |
| 815/0x32F | 2Pd | Low pressure cutoff enable, Contour 2 | 1/10 bar | 0.5 | 0.5-18 | |
| 816/0x330 | 2P4 | Alarm mode for freezing, Contour 2 | - | 1 | 0-2 | 0 = disabled, 1 = enabled, auto-return, 2 = enabled, manual return |
| 817/0x331 | 2P2 | Freezing cutoff, Contour 2 | 1/10 °C | 0 | -20-5 | |
| 818/0x332 | 2P5 | Freezing alarm delay, Contour 2 | Sec. | 30 | 5-199 | |
| 819/0x333 | 2P- | Overheat control, Contour 2 (fixed PID, Kp factor) | 1/10 | 1.0 | 0.1-10 | display 1/10K |
| 820/0x334 | 2i- | Overheat control, Contour 2 (fixed PID, Ti factor) | - | 100 | 1-350 | |
| 821/0x335 | 2d- | Overheat control, Contour 2 (fixed PID, Td factor) | 1/10 | 3.0 | 0.1-20 | display 1/10K |
| 822/0x336 | 2uH | Alarm mode for high overheat, Contour 2 | - | 0 | 0-1 | 0 = disabled, 1 = enabled, auto-return |
| 823/0x337 | 2uA | High overheat setpoint, Contour 2 | 1/10 K | 30 | 16-40 | |
| 824/0x338 | 2ud | High overheat alarm delay, Contour 2 | min. | 3 | 1-15 |
Configuration Parameters EXD-HP1/2 (for both contours)
| 10-/16-bit Modbus Address | Display Code | Description | Unit | Default | Operating Range | Remarks |
| 825/0x339 | Et | Valve type for HP1 and HP2 | - | 0 | 0 | 0 = EXM/L, 1 = EXN (see note on page 2 and 3). EXD-HP2 can control 2 identical valves, i.e. EXM/EXL or EXN. |
| 831/0x33F | 1E3 | Discharge temperature setpoint | 1/10 °C | 85 | 70-140 | This value is the starting point for discharge temperature regulation. |
| 832/0x340 | 1E4 | Discharge temperature regulation range | 1/10 °C | 20 | 2-25 | |
| 833/0x341 | 1E5 | Discharge temperature limit | 1/10 °C | 120 | 100-150 | When the discharge temperature exceeds this limit, an alarm is triggered immediately. |
| 834/0x342 | 1E6 | Max. condensation pressure | 1/10 bar | 20 | 10-45 | This is used as the maximum value in 1E7. |
| 835/0x343 | 1E7 | Injection pressure limit | 1/10 bar | 20 | 10-1E6 | Max. value is 'Max. condensing pressure' (1E6). |
| 836/0x344 | 1E8 | Injection high pressure delay (sec) | sec | 60 | 1-300 |
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