Evaporative Cooler SKVF Series Modbus Communication Module User Guide SKVF-Modbus Guide(v1.
SKVF Evaporative Cooler Modbus Communication Module User Guide Introduction The SKVF Modbus Communication Module User Guide provides information for using Neptronic® communication feature. The controller uses Modbus communication protocol over serial line in the RTU mode and provides a Modbus network interface between client devices and Neptronic SKVF devices. The SKVF Modbus Guide assumes that you are familiar with Modbus terminology. The following are the requirements for Modbus: • Data Model.
SKVF Evaporative Cooler Modbus Communication Module User Guide Modbus Registers Table Glossary Name Description Name Description W Writable Register ASCII For registers containing ASCII (8-bit) characters RO Read Only Register MSB Most Significant Byte Unsigned For range of values from 0 to 65,535, unless otherwise specified LSB Least Significant Byte Signed For range of values from -32,768 to 32,767, unless otherwise specified MSW Most Significant Word Bit String For registers with mu
SKVF Evaporative Cooler Modbus Communication Module User Guide Protocol Base Holding Register 7 400008 Product Actual Firmware Version (in Integer x100) Unsigned Scale 100 1 to 65535 (e.g. 100) RO 8 400009 Product Actual EEPROM Version (in Integer x100) Unsigned Scale 100 1 to 65535 (e.g. 100) RO 2000 402001 Control Signal Unsigned Scale 1000 Units: Volt (V), Range: 0V to 15V Value x 1000 (e.g.
SKVF Evaporative Cooler Modbus Communication Module User Guide Protocol Base Holding Register Writa ble Default Value 4000 404001 Power Output Feedback Signal Unsigned Scale 1000 Unit: Volt (V), Range: 0V to 10V Value x 1000 (e.g. 2V = 2000) RO 0V 4001 404002 ECM Fan Signal Unsigned Scale 100 Unit: Volt (V), Range: 0V to 10V Value x 1000 (e.g. 2V = 2000) RO 0V 6000 406001 Demand Unsigned Scale 100 Unit: %, Range: 0% to 100% Value x 100 (e.g.
SKVF Evaporative Cooler Modbus Communication Module User Guide Protocol Base Holding Register Writa ble Default Value 6011 406012 Supply High Limit RH Min Unsigned Scale 100 Unit: % RH, Range: 0% RH to 100% RH Value x 100 (e.g. 10% RH = 1000) W 0% RH 6012 406013 Supply High Limit RH Max Unsigned Scale 100 Unit: % RH, Range: 0% RH to 100% RH Value x 100 (e.g. 10% RH = 1000) W 0% RH 6013 406014 Supply High Limit RH Bias Signed Scale 100 Unit: %, Range: -10% RH to 10% RH Value x 100 (e.
SKVF Evaporative Cooler Modbus Communication Module User Guide Protocol Base Holding Register Writa ble Default Value 6029 406030 Service On Time (3) 6030 406031 Dead Band Unsigned Scale 1 Unit: %, Range: 1% to 100% Value x 1 (e.g. 10% = 10) W 5% 6031 406032 Minimum Production Output Unsigned Scale 1 Unit: %, Range: 0% to 100% Value x 1 (e.g. 10% = 10) W 10% 6032 406033 Maximum Production Output Unsigned Scale 1 Unit: %, Range: 0% to 100% Value x 1 (e.g.
SKVF Evaporative Cooler Modbus Communication Module User Guide Protocol Base Holding Register Writa ble Default Value 6042 406043 Fixed Drain Time Unsigned Scale 1 Unit: Hours (h), Range: 4 to 72 h Value x 1 (e.g. 10h = 10) W 6h 6043 406044 Line Rinse Time Unsigned Scale 1 Unit: Seconds (sec), Range: 0sec to 2000sec Value x 1 (e.g. 10sec = 10) W 180 sec 6044 406045 Water Treatment Service Volume Unsigned Scale 1 Unit: Litres (l), Range: 2500 to 10000 l Value x 1 (e.g.
SKVF Evaporative Cooler Modbus Communication Module User Guide Protocol Base Holding Register Writa ble Default Value 6055 406056 RH Supply High Limit Network Reading Unsigned Scale 100 Unit: % RH, Range: 0% RH to 100% RH Value x 100 (e.g. 10% RH = 1000) W 0% RH 6056 406057 RH Supply High Limit Setpoint Unsigned Scale 100 Unit: % RH, Range: 0% RH to 100% RH Value x 100 (e.g.
SKVF Evaporative Cooler Modbus Communication Module User Guide Protocol Base Holding Register Description Data Type Units, Limits, State Texts Writa ble Default Value Unit: C or F, Range: -40.0°F, max: 212.0°F or -40.0°C, max: 100.0°C Value x 100 (e.g. 10°C = 1000) W 20.0°C or 68.0°F 6067 406068 Room Temperature Signed Scale 100 6068 406069 Room Temperature Min Signed Scale 100 Unit: C or F, Range: -40.0°F, max: 212.0°F or -40.0°C, max: 100.0°C Value x 100 (e.g. 10°C = 1000) W 0.
SKVF Evaporative Cooler Modbus Communication Module User Guide Protocol Base Holding Register Writa ble Default Value 6078 406079 Room Temperature Demand Unsigned Scale 100 Unit: %, Range: 0% to 100% Value x 100 (e.g. 10% = 1000) RO 0% 6079 406080 HRL Temperature Signed Scale 100 Unit: ºC/ºF, Range: -40°C to 260°C or -40°F to 500°F, Value x 100 (e.g. 5°C = 500 or 10ºF = 1000) RO 0°C or 32°F 6080 406081 HRL Humidity Unsigned Scale 100 Unit: % RH, Range: 0% RH to 100% RH Value x 100 (e.
SKVF Evaporative Cooler Modbus Communication Module User Guide Protocol Base Holding Register Description Data Type 6091 406092 Temp Supply High Limit Proportional Band Unsigned Scale 10 Writa ble Default Value Unit: %, Range: 1% to 100% Value x 100 (e.g. 10% = 100) RO 10% Unit: C or F, Range: -40.0°F, max: 212.0°F or -40.0°C, max: 100.0°C Value x 100 (e.g. 10°C = 1000) W 20.0°C or 68.
SKVF Evaporative Cooler Modbus Communication Module User Guide Protocol Base Holding Register Writa ble Default Value 6101 406102 Unit: Seconds (sec), Range: 1 to 900 sec Value x 1 (e.g. 10sec = 10) W 900 sec 6102 Unsigned Scale 10 Unit: %, Range: 1% to 100% Value x 10 (e.g. 10% = 100) W 5% RH Supply High Limit Proportional Band Unsigned Scale 10 Unit: %, Range: 1% to 100% Value x 100 (e.g.
SKVF Evaporative Cooler Modbus Communication Module User Guide Protocol Base Holding Register Writa ble Default Value 10005 410006 RS485 Interface Unsigned Scale 1 0 = No 1 = Yes RO No 10006 410007 Ethernet Interface Unsigned Scale 1 0 = No 1 = Yes RO No 10007 410008 Relay Fuse Unsigned Scale 1 0 = Normal 1 = Blown Fuse RO Normal 10008 410009 Control PCB Fuse Unsigned Scale 1 0 = Normal 1 = Open Fuse RO Normal 11000 411001 Alarm Warning Relay Unsigned Scale 1 0 = Off 1 =
SKVF Evaporative Cooler Modbus Communication Module User Guide Protocol Base Holding Register Writa ble Default Value 12001 412002 Water Treatment Service Due Unsigned Scale 1 0 = No 1 = Yes RO No 12002 412003 Service Due Unsigned Scale 1 0 = Not Allowed 1 = Allowed W Not Allowed 12003 412004 Run While Water Service Alarm Unsigned Scale 1 0 = Not Allowed 1 = Allowed W Not Allowed 12004 412005 Startup Line Rinse Unsigned Scale 1 0 = Off 1 = On W Off 12005 412006 Run While S
SKVF Evaporative Cooler Modbus Communication Module User Guide Protocol Base Holding Register 15003 415004 15004 415005 Description Data Type Units, Limits, State Texts Writa ble Default Value Unsigned Scale 1 0 = 0-10Vdc 1 = 2-10Vdc 2 = 4-20mA 3 = 0-20mA W 0-10Vdc Control Profile Unsigned Scale 1 0 = ExternAnalog 1 = ExternNetwork 2 = InternHumAnalog 3 = InternHumNetwork 4 = InternCoolAnalog 5 = InternCoolNetwork 6 = HRLHum 7 = HRLCool 8 = Custom W ExternAnalog 0 = Disabled 1 = Exter
SKVF Evaporative Cooler Modbus Communication Module User Guide Protocol Base Holding Register Description Data Type Units, Limits, State Texts Writa ble Default Value 0 = Off 1 = Idle 2 = LineRinse 3 = Filling 4 = Draining 5 = Running 6 = Alarm 7 = Drying RO Off 3 = WaterLeak 4 = FanDefect RO Normal 15014 415015 State Unsigned Scale 1 15015 415016 System Alarm Unsigned Scale 1 0 = Normal 1 = DrainTimeout 2 = FillTimeout 0 = Off 1 = Default 2 = On W Default 15016 415017 Fan Reques
SKVF Evaporative Cooler Modbus Communication Module User Guide Protocol Base Holding Register 15025 415026 Control Signal Type Unsigned Scale 1 0 = 0-10Vdc 1 = 2-10Vdc 15026 415027 System Power State Unsigned Scale 1 0 = Off 1 = On 15027 415028 Recirculation Request Unsigned Scale 1 0 = None 1 = ResetAlarms 2 = Drain 15028 415029 DirectFeed Request Unsigned Scale 1 0 = None 1 = ResetAlarms www.neptronic.
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