DAB EVOPLUS, EVOPLUS SAN, EVOPLUS SMALL Manual
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DAB EVOPLUS, EVOPLUS SAN, EVOPLUS SMALL Manual

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Contents
DAB EVOPLUS, EVOPLUS SAN, EVOPLUS SMALL Manual

INTRODUCTION

Abbreviations

0x Preface indicating a hexadecimal number
RTU Remote Terminal Unit
CRC Cyclic Redundancy Check.

Table 1: Abbreviations Table

Product specifications

The table below describes the specifications of the Modbus interface present:

Modbus specifications Description Comments
Protocol Modbus RTU Only "Slave" mode is supported
Connector Screw terminal
Modbus connection RS485 - 2 wire
Slave address 1-247 Set at the first start by the display, otherwise by Modbus a message
Line termination Absent on appliance If necessary proceed as described in Wiring
Transmission speeds supported 1200,
2400,4800,9600,19200,38400 Kb/s 		Set by display or Modbus a message
Start bit 1
Data bit 8
Stop bit 1 o 2 Set by display or Modbus a message
Parity None, Even or Odd Set by display or Modbus a message

Table 2: Modbus specifications

Notes:

  1. In the product EVOPLUS SMALL it is possible to set the parameters only from the display

Type of network

A Modbus network contemplates only one master device connected to the network and up to 247 SLAVE devices which can communicate on the bus only after a request made by the master.
The type of network recommended for connecting the device to a Modbus network is the "daisy chain" type, with the possibility of making small derivations, the maximum length of which depends on the baud rate chosen for transmission.
The maximum number of devices connected to a network without repeaters is 32.
As shown in Figure 1, it may be necessary to terminate the line at the end and at the beginning with terminating resistors (LT).
Example of a Modbus network with termination

PRODUCT CONFIGURATION

Wiring

Modbus communication with 2-wire RS485 contemplates the use of 3 cables (A, B and GND). Connect the 3 cables correctly. It is recommended to use a screened 2-pole cable, with a twisted pair.

MODBUS
Terminals 		Description
A Terminal not inverted (+)
B Terminal inverted (-)
Y Screen

Table 3: Modbus- Rs485 connection

For the connections, see the product installation manual.

Parameter Configuration

To configure the Modbus parameters correctly, the user must the access the Modbus configuration menu, accessible from the display (see Installation manual).Table 4 describes the parameters that can be set from the menu.

Parameter Symbol Description Range Default value Measuring unit
Ad Modbus address of the device 1-247 1
Br Serial communication baud rate 1.2, 2.4, 4.8, 9.6, 19.2, 38.4 19.2 Kb/s
Pa Type of parity control None, Odd, Even Even
Sb Number of stop bits 1-2 1
Rd Minimum response time 0-3000 0 ms
En Modbus enabling Disable, Enable Disable

Table 4: Parameter Configuration from Display

After having set all the parameters, enable the Modbus peripheral by setting parameter En at Enable.

REGISTERS

The registers have a 16-bit size, if the content of the register is 0x7FFF, the content is not available. R/W registers are available to read with the function codes 0x03, 0x04, to write with the function codes 0x06, 0x10.
R registers are available in read-only mode with the function codes 0x03 e 0x04.

The data are all of the UNSIGNED type, except registers named Temperature (e.g. 00212 ), which have SIGNED data.

Attention: The registers have a value from 1 to n, the address in the data package goes from 0 to n1!!! (see example 3.2)

Address Name Type Range
(Scale) 		R/W Description
00001 SlaveMinimumReplyDelay 0-3000 (1 ms) R/Wa The value indicates the minimum reply time of the Slave to a request from the Master.
00002 SetModbusAddress 1-247 R/Wa The value indicates the address that the device will have on the ModBus field bus. If a value is inserted that is not in the validity range, the previous value will be maintained.
00003 ModbusBaudRate 0-5 R/Wa The value defines the serial communication baud rate.
  1. 1200 bit/s
  2. 2400 bit/s
  3. 4800 bit/s
  4. 9600 bit/s
  5. 19200 bit/s
  6. 38400 bit/s
00004 ModbusParityBits 0-2 R/Wa The value defines the type of parity used in serial transmission.
  1. No Parity
  2. Even parity
  3. Odd parity
00005 ModbusStopBits 1-2 R/Wa The value defines the number of Stop bits used.
  1. Stop bit
  2. Stop bit
00006 AutoAckControlBits 0-1 R/Wa The value defines whether the user must manually reset at 0 the reset Alarm and ClearHistory registers.
  1. The registers return to 0 automatically
  2. The registers must be reset at 0 manually
00101 SystemResetAlarm R/Wb

The control bit resets the system alarms

  1. Do not reset
  2. Reset


The command is performed by writing 1 on the register in presence of the value 0.
00102 System ClearHistory R/Wb

Resets the alarm history of the entire system

  1. Do not reset
  2. Reset


The command is performed by writing 1 on the register in presence of the value 0.
00103 RegulationMode R/W The register value indicates the type of regulation chosen for the pump.


Evoplus M/L Software Version (A.B) 1.xx e 2.xx

  1. Proportional differential pressure regulation.
  2. Proportional differential pressure regulation with set-point set by external signal (0-10V or PWM).
  3. Proportional differential pressure regulation with set-point depending on temperature with positive increment.
  4. Proportional differential pressure regulation with set-point depending on temperature with negative increment.
  5. Regulation with constant differential pressure.
  6. Constant differential pressure regulation with set-point set by external signal (0-10V or PWM).
  7. Constant differential pressure regulation with set-point depending on temperature with positive increment.
  8. Constant differential pressure regulation with set-point depending on temperature with negative increment.
  9. Regulation with constant curve with set-point set from the register.
  10. Regulation with fixed curve with set-point set by external signal (0- 10V or PWM).

Evoplus Small Software Version (A.B) 1.xx

  1. Proportional differential pressure regulation.
  2. Proportional differential pressure regulation with set-point set by external signal (0-10V or PWM).
  3. Regulation with constant differential pressure.
  4. Constant differential pressure regulation with set-point set by external signal (0-10V or PWM).
  5. Regulation with constant curve with setpoint set from the register.
  6. Regulation with fixed curve with set-point set by external signal (0-10V or PWM).

Evoplus M/L Software Version (A.B) 3.xx
Evoplus Small Software Version (A.B) 2.xx

  1. Proportional differential pressure regulation.
  2. Proportional differential pressure regulation with set-point set by external signal (0-10V or PWM).
  3. Proportional differential pressure regulation with set-point depending on temperature
  4. Regulation with constant differential pressure.
  5. Constant differential pressure regulation with set-point set by external signal (0-10V or PWM).
  6. Constant differential pressure regulation with set-point depending on temperature.
  7. Regulation with constant curve with set-point set from the register.
  8. Regulation with fixed curve with set-point set by external signal (0-10V or PWM).
00104 RegulationSetPoint (0.1m) R/W The value indicates the regulation set point.
00105 RegulationTmax 0-100 (1°C) R/W The value indicates the parameter Tmax with which to make the curve depending on temperature
00106 RegulationAutoEconomy The value indicates the choice to use "auto" or "economy" mode
  1. auto
  2. economy
00107 SetPointPerCentReduction 50-90%
(1%) 		R/W The value indicates the percentage reduction of the set point in "economy" mode.
00108 ExtSignalType 0-3 R/W The value indicates the type of external signal that regulates the set point (used only in some modes).
  1. 0-10V increasing (Set point increases as the value 0-10V increases)
  2. 0-10V decreasing (Set point decreases as the value 0-10V decreases)
  3. PWM increasing (Set point increases as the PWM duty cycle increases)
  4. PWM decreasing (Set point decreases as the PWM duty cycle decreases)
00109 TwinPumpSystemMode 0-2 R/W In the case of twin operation, the parameter indicates the operating mode
  1. Simultaneous
  2. Alternate every 24h
  3. Main/Reserve
00110 MaxRpmPercent 25-100
(1%) 		R/W The value indicates the set point as a percentage of the value of the maximum allowed revs
00111 OnOffExt 0-2 R/W The value indicates the Pump on or off status
  1. On
  2. Off
  3. Ext
Configuration block and status of Pump 1
00201 Bit0: Pump1ResetAlarm R/W If at 1 resets alarm
Bit1: Pump1ClearHistory

If at 1 resets alarm history


The command is performed by writing 1 on the bit in presence of the value 0.
00202 Pump1Status 0-2 R Indicates the pump status
  1. Pump off
  2. Charge status
  3. Pump running
00203 Pump1Fault 0-1 R Indicates if the inverter is stopped due to a fault
  1. Ok
  2. Fault
00211 Pump1ElectronicBoardTemp erature (1°C) R Ambient temperature value inside container
00212 Pump1ElectronicHeatsinkTe mperature (1°C) R Temperature value on heat sink.
00213 Pump1LineVoltage (1V) R Input voltage value (Rms)
00214 Pump1OutCurrent (1mA) R Output current value
00215 Reserved
00216 Pump1RPM (1rpm) R Motor revs per minute
00217 Pump1Power (1W) c R Power delivered
00218 Pump1OperatingTimeHI (1h) R Pump use time
00219 Pump1OperatingTimeLO (1h) R Pump use time
00220 Pump1Head (0.1m) R Pump head
00221 Pump1EstimatedFlow (0.1m3/ h) R Value of estimated flow in m3/h
00222 Pump1LiquidTemperature (1°C) R Value of temperature measured by internal sensor
00223 Pump1LiquidTemperatureExt (1°C) R Value of temperature measured by external sensor
00224-00230 Reserved
00231-00245 Pump1Alarm Alarms history, the register 00231 contains the most recent alarm, while the register 00245 contains the least recent alarm. For the list of alarms, see the user manual.
00251 SoftwareNumberVersionA 0-255 R
00252 SoftwareNumberVersionB 0-255 R
00253 SoftwareNumberVersionC 0-255 R
00254 SoftwareNumberVersionD 0-255 R
00255 SoftwareNumberVersionE 0-255 R
00256 SoftwareNumberVersionF 0-255 R
00257 Unit Family R Indicates the name of the device family
00258 UnitType R Indicates the type of device of the specific family
00259 Unit Version R Product version

Table 5: Modbus registers

Notes:

  1. In the product EVOPLUS SMALL the register is read-only.
  2. In the product EVOPLUS SMALL the writing operations take place only with the WRITE SINGLE REGISTER control.
  3. In the product EVOPLUS SMALL the unit of measure is in mW.

Supported messages

The maximum length of a Modbus package is 256 byte.

The package structure is shown in Error! Reference source not found..

Slave address Function Code Data CRC
1 byte 1 byte 0-252 byte 2 byte

Table 6: Modbus package structure

Read holding Register

(Function code = 0x03)
This function is for reading the value of the holding registers from the slave device. The request package specifies the start address and the quantity of registers to read.

Slave address Function Code Start address HI Start address LO Quantity of registers HI Quantity of registers LO
0x01 0x03 0x00 0x02 0x00 0x01

The slave reply will contain the number of reply bytes and the content of the registers.

Slave address Function Code Bytes sent HI value LO value
0x01 0x03 0x02 0x00 0x00

Read Input Register

(Function code = 0x04)
This function is for reading the value of the input registers from the slave device. The request package specifies the start address and the quantity of registers to read.

Slave address Function Code Start address HI Start address LO Quantity of registers HI Quantity of registers LO
0x01 0x04 0x00 0xFF 0x00 0x01

The slave reply will contain the number of reply bytes and the content of the registers.

Slave address Function Code Bytes sent HI value LO value
0x01 0x04 0x02 0x00 0x00

Write Single Register

(Function code = 0x06)
This function is for writing a register of the slave device. The request package specifies the register address and the value (2 byte) to write.

Slave address Function Code Start address HI Start address LO HI value LO value
0x01 0x06 0x00 0x02 0x00 0x02

Slave reply:

Slave address Function Code Start address HI Start address LO HI value LO value
0x01 0x06 0x00 0x02 0x00 0x02

Write Multiple Register

(Function code = 0x10)
This function is for writing one or more registers of the slave device. The request package specifies the start address, the quantity of registers to write, the number of bytes and the values to write.

Slave address Function Code Start address HI Start address LO Quantit y of register s HI Quantity of registers LO Number of bytes HI Register
00003 HI
0x01 0x10 0x00 0x02 0x00 0x02 0x04 0x00
Register
00003 LO 		Register
00004 HI 		Register
00004 HI
0x00 0x00 0x01

Example of message

Some examples of Modbus communication will be illustrated below.

Reading Pump Power

This section will illustrate how to take a reading of the power supplied by Pump.
The value 0x01 will be used as the address in the example.
Request from master to slave

Byte Value Description
Slave address 0x01
Function Code 0x03 Function "Read holding register"
Start Address HI 0x00 Start address is 0x0D8 = 216, so the Modbus address is 217
Start Address LO 0xD8
Quantity HI 0x00 Quantity of registers to read = 1
Quantity LO 0x01

Slave reply

Byte Value Description
Slave address 0x01
Function Code 0x03 Function "Read holding register"
Number of bytes 0x02
00223 HI 0x03 The value read is 0x3E8 = 1000 W
00324 LO 0xE8

Use of alternate operating mode in twin configuration

This section will illustrate how to configure the system in alternate mode.
Request from master to slave

Byte Value Description
Indirizzo Slave 0x01
Function Code 0x06 Function "Write holding register"
Start Address HI 0x00 Start address is 0x006C = 108, so the Modbus address is 109
Start Address LO 0x6C
Write HI 0x00 Sets register at value 1, or alternate mode.
Write LO 0x01

Slave reply

Byte Value Description
Slave address 0x01
Function Code 0x06 Function "Write holding register"
Start Address HI 0x00 Start address is 0x006C = 108, so the Modbus address is 109
Start Address LO 0x6C
Write HI 0x00 Sets register at value 1, or alternate mode.
Write LO 0x01

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