IOMOD 4Cs4Vs

IOMod 4Cs4Vs is a compact-sized stand-alone power meter used for measuring analog AC input signals from low power current and voltage sensors. It measures three phases of AC voltages and currents with additional input for neutral/residual voltage and current. Measured and calculated values transmitted to the host system via industry standard IEC 60870-5-103 and Modbus RTU communication protocols.

IOMOD 4Cs4Vs User Manual

Introduction

IOMod 4Cs4Vs is a compact-sized stand-alone power meter for measuring analog AC input signals from low-power current and voltage sensors.  It measures three phases of AC voltages and currents with additional inputs for neutral/residual voltage and current. The measured and calculated values are transmitted to the host system via communication protocol IEC 60870-5-103 or Modbus RTU.

Features

Common configuration information

  1. Nominal system frequency. In order to get correct three-phase system measurements, a user must select nominal system frequency – either 50Hz or 60Hz.
  2. Process parameters. There user can set rated primary current and voltage values which are used for calculating measured data in primary values. Those values are available only via float registers in the Modbus RTU protocol.
  3. Configuration of sensors. The power meter is designed to work with standard low-power current and voltage sensors with a nominal output value of 225mV for the current sensor and 3.25√3 V (1.876V) for the voltage sensor. If current sensors have some deviation from the nominal value, a user can define the exact sensor voltage. The new value will be set the same for all current sensors inputs. Each voltage sensor input has a separate correction parameter called the magnitude factor. This factor is used to multiply measured voltage. For example, if a sensor has a 5% lower output voltage, the user can set the magnitude to 1050. The actual factor will be 1.05 and the measured value will be multiplied by this factor. This factor can be used in cases when several measuring devices are connected to the same sensor in parallel. In this case, the parallel connection will reduce the internal resistance of the sensor and consequently output voltage. The magnitude factor can be used to compensate for this deviation.
  4. Communication protocol. Selection of IEC 60870-5-103 or Modbus RTU communication protocol.

Connection diagram

Fig. 4.1. IOMOD 4CS4VS internal structure and connection diagram Fig. 4.1. IOMOD 4CS4VS internal structure and connection diagram

Technical information


System
1. Dimension 101 x 119 x 17.5 mm
2. Case ABS, black
3. Working environment Indoor
4. Working temperature -30 | +70
5. Recommended operating conditions  5 – 60°C and 20 – 80%RH;
6. Configuration

USB – configuration terminal via com port

7. Firmware upgrade USB – mass storage device

Electrical specifications

8. Inputs

16-bit resolution,

Input resistance: ~1 MOhm

Input capacitance: ~170pF

Input Ranges:

  • Current input:
    • nominal 225mV (rms);
  • Voltage input:
    • nominal 1.876V (rms);
Overvoltage protection up to ±20V (all inputs)

Power

9. Power Supply 9V to 33V
10. Current consumption 40mA @ 12VDC, 20mA @ 24VDC

RS485 Interface

IOMod 4Cs4Vs has an integrated 120Ω termination resistor, which can be enabled or disabled via the configuration terminal. It is recommended to use termination at each end of the RS485 cable. See the typical connection diagram in Fig. 6.1.

Fig. 6.1. Typical IOMod connection diagramFig. 6.1. Typical IOMod connection diagram

IOMod 4Cs4Vs has a 1/8 Unit load receiver which allows having up to 255 units on a single line (compared to standard 32 units). To reduce reflections keep the stubs (cable distance from the main RS485 bus line) as short as possible.

Configuration over USB

Driver installation

The device requires USB drivers to work as a Virtual COM port. The first-time connection between the device and the computer could result in a “Device driver software was not successfully installed” error (as in Fig. 7.1). 

Fig. 7.1. Unsuccessful device software installation error Fig. 7.1. Unsuccessful device software installation error 

A user then should manually install drivers by selecting a downloaded driver folder:

Fig. 7.2. Device driver software update message Fig. 7.2. Device driver software update message

●    Select “x86” driver for a 32-bit machine or x64 for a 64-bit machine. If not sure, select a root folder (folder in which x64 and x86 lay inside, as in Fig. 7.3).

Fig. 7.3. Device driver folder contentFig. 7.3. Device driver folder content

IOMod configuration via PuTTY terminal

A configuration of the IOMod device is done through CLI (Command Line Interface) on the virtual COM port. Drivers needed for Microsoft Windows to install VCOM will be provided. To open up CLI simply connect to a specific V-COM port with terminal software (advised to use PuTTY terminal software. If other software is being used, a user might need to send <return> symbol after each command). When connected user should immediately see the main screen (Fig. 7.4).

Fig. 7.4. The main menuFig. 7.4. The main menu

Navigation is performed by sending the character shown in square brackets to a terminal. A user then proceeds by following on-screen instructions. For example, to set the baud rate, press [2] to enter a new link address - press [1]; press [RETURN] to save, or [ESC] to cancel changes. When done, press [0] (exit) before disconnecting the device. Default values are set by pressing [7] on the main screen, and confirming changes [1].

It is highly advised to exit the main screen before disconnecting the device

If the terminal window is closed accidentally, a user can connect the terminal program again, and press any key on a keyboard to show the main menu again.

Configuration terminal menu


Menu Name Submenu Values Default Values
[S] Process parameters

[1] Set rated primary voltage

[2] Set rated primary current

1 – 65000 V 

1 – 65000 A

1 V

1 A

[P] Communication protocol

[1] IEC103

[2] Modbus RTU

-

-

Modbus RTU

[1] Link or device Address

Set link or device address

1-254

1

[2] Baud rate, Parity and Stop bits

[1] Set 8 Data bits + 1 Stop bit

[2] Set 8 Data bits + 2 Stop bit

[3] Configure baud rate

[4] Configure Parity

-

-

100-256000

None/ Odd / Even / Mark/ Space

1 Stop bit


9600

Even

[3] RS485 Terminating Resistor

[1] Enable

[2] Disable

-

-

Disabled

[4] Configure sensors

[1] – magnitude factor of voltage sensor 1

[2] – magnitude factor of voltage sensor 2

[3] – magnitude factor of voltage sensor 3

[4] – magnitude factor of voltage sensor 4

[5] – current sensor nominal value

100 - 3000

100 - 3000

100 - 3000

100 - 3000

100 – 3000 mV


1000


1000


1000


1000


225 mV

[5]

Select measurand set and scale factor*


*(this menu is visible only when the IEC103 protocol is activated)

[1] Measurand set 1

[2] Measurand set 2

[3] Measurand set 3

[4] Measurand set 4

[5] Scale factor 1.2

[6] Scale factor 2.4

[7] Function type

-

-

-

-

-

-

1 - 255




Measurand set 4

Scale factor 1.2


253

[6] Set nominal system frequency

[1] – 50 Hz

[2] – 60 Hz

-

-

50 Hz

[7] Set Default Settings

[1] - confirm

[0] - cancel

-

-

-

[8] Firmware Upgrade

[1] - confirm

[0] - cancel

-

-

-

[9] Diagnostics

Raw input values

-

-

[0] Exit

Exit and disconnect

-

-

IEC 60870-5-103 operational information

When the IEC-60870-5-103 protocol is selected IOMod uses a standard communication scheme. Initiation, control messages, and queries are initiated by a master (controlling station), while the IOMod device (controlled station) only answers requests and sends values. The first message sent by the master should be RESET CU to restart communication. When acknowledge (ACK) packet is sent from a slave device, a master may proceed with acquiring General Interrogation and sending Time synchronization packets.

When this initialization is complete, the master should poll the IOMod device with Class 1 and Class 2 requests. Class 2 is used when the master polls for cyclic data. The controlled device responds when spontaneous data exists and the master then sends a request for Class 1. The controlled station responds with a time-tagged message.

As IOMod 4Cs4Vs doesn’t have any digital inputs, only analog ones, therefore the general interrogation returns nothing. Values of measurements are returned cyclically as a response to Class 2 data request

Specific settings for the IEC 60870-5-103 protocol:

  1. Measurand set selection. A user can select which predefined measurand set will be transmitted to the host system. Available measurand sets are presented in table 8.1.
  2. Scale factor. The communication protocol IEC 60870-5-103 only lets 13-bit signed values in the range of -1...+1. When an IEC 60870-5-103 measurand, for example, phase voltage, is scaled as 2.4, it means that the measurand value 1 corresponds to 2.4×Un, measurand value 0.5 corresponds to 1.2×In, and so on. If the measurand value, in this case, exceeds 2.4×Un, the IEC 60870-5-103 object value saturates at its maximum value and an overflow flag is set in the IEC 60870-5-103 object transmission
  3. Device function type. By default, IOMod has IEC 60870-5-103 Function Type set to 253. If this Function type for some reason is not suitable – a user can define any other type

Table 8.1. Measurand sets

Set Nr.

ASDU

FUN*

INF

Qty of data

Information elements (measurands)

1

9

253

148

9

I1, I2, I3, U1, U2, U3, P, Q, f

2

9

253

149

23

I1, I2, I3, I4, U1, U2, U3, U4, P1, P2, P3, Q1, Q2, Q3, S1, S2, S3, PF1, PF2, PF3, U12ph, U23ph, U13ph

3

9

253

150

60

I1, I2, I3, IN, U1, U2, U3, UN, P1, P2, P3, Q1, Q2, Q3, S1, S2, S3, PF1, PF2, PF3, U12, U23, U13, f, THDU1, THDU2, THDU3, THDI1, THDI2, THDI3, I1_H2, I1_H3, I1_H5, I1_H7, I1_H9, I2_H2, I2_H3, I2_H5, I2_H7, I2_H9, I3_H2, I3_H3, I3_H5, I3_H7, I3_H9, U1_H2, U1_H3, U1_H5, U1_H7, U1_H9, U2_H2, U2_H3, U2_H5, U2_H7, U2_H9, U3_H2, U3_H3, U3_H5, U3_H7, U3_H9

4

9

253

151

54

I1, I2, I3, IN, U12, U23, U13, UN, S, P, Q, PF, THDU1, THDU2, THDU3, THDI1, THDI2, THDI3, I1_H3, I1_H5, I1_H7, I1_H9, I2_H3, I2_H5, I2_H7, I2_H9, I3_H3, I3_H5, I3_H7, I3_H9, U1_H3, U1_H5, U1_H7, U1_H9, U2_H3, U2_H5, U2_H7, U2_H9, U3_H3, U3_H5, U3_H7, U3_H9, P1, P2, P3, Q1, Q2, Q3, U1ph, U2ph, U3ph, U1, U2, U3

No. Designation Measured quantity

1

I1

Phase L1 current with standard scaling (1.2 or 2.4)

2

I2

Phase L2 current with standard scaling (1.2 or 2.4)

3

I3

Phase L3 current with standard scaling (1.2 or 2.4)

4

I4

IN channel current with standard scaling (1.2 or 2.4)

5

U1

Phase L1 voltage with standard scaling (1.2 or 2.4)

6

U2

Phase L2 voltage with standard scaling (1.2 or 2.4)

7

U3

Phase L3 voltage with standard scaling (1.2 or 2.4)

8

U4

UN channel voltage with standard scaling (1.2 or 2.4)

9

P1

Phase L1 real power with standard scaling (1.2 or 2.4)

10

P2

Phase L2 real power with standard scaling (1.2 or 2.4)

11

P3

Phase L3 real power with standard scaling (1.2 or 2.4)

12

P

Total 3 phase real power (P1+P2+P3) with standard scaling (1.2 or 2.4) divided by 3

13

Q1

Phase L1 reactive power with standard scaling (1.2 or 2.4)

14

Q2

Phase L2 reactive power with standard scaling (1.2 or 2.4)

15

Q3

Phase L3 reactive power with standard scaling (1.2 or 2.4)

16

Q

Total 3 phase reactive power (Q1+Q2+Q3) with standard scaling (1.2 or 2.4) divided by 3

17

S1

Phase L1 apparent power with standard scaling (1.2 or 2.4)

18

S2

Phase L2 apparent power with standard scaling (1.2 or 2.4)

19

S3

Phase L3 apparent power with standard scaling (1.2 or 2.4)

20

S

Total 3 phase apparent power (S1+S2+S3) with standard scaling (1.2 or 2.4) divided by 3

21

PF1

Phase L1 power factor with standard scaling (1.2 or 2.4)

22

PF2

Phase L2 power factor with standard scaling (1.2 or 2.4)

23

PF3

Phase L3 power factor with standard scaling (1.2 or 2.4)

24

PF

Total 3-phase power factor with standard scaling (1.2 or 2.4)

25

U12ph

Phase angle between U1 and U2 without scaling in 0.1deg

26

U23ph

Phase angle between U2 and U3 without scaling in 0.1deg

27

U13ph

Phase angle between U1 and U3 without scaling in 0.1deg

28

f

Phase L1 voltage frequency with fixed scaling 50

29

IN

Calculated neutral current with standard scaling (1.2 or 2.4)

30

UN

Calculated neutral voltage with standard scaling (1.2 or 2.4)

31

U12

Calculated phase-to-phase voltage with standard scaling (1.2 or 2.4) divided by SQRT(3)

32

U23

Calculated phase-to-phase voltage with standard scaling (1.2 or 2.4) divided by SQRT(3)

33

U13

Calculated phase-to-phase voltage with standard scaling (1.2 or 2.4) divided by SQRT(3)

34

THDU1

Total harmonic distortions of U1 voltage in 0.1%

35

THDU2

Total harmonic distortions of U2 voltage in 0.1%

36

THDU3

Total harmonic distortions of U3 voltage in 0.1%

37

THDI1

Total harmonic distortions of I1 current in 0.1%

38

THDI2

Total harmonic distortions of I2 current in 0.1%

39

THDI3

Total harmonic distortions of I3 current in 0.1%

40

I1_H2

2nd harmonic level of I1 current in 0.1%

41

I1_H3

3rd harmonic level of I1 current in 0.1%

42

I1_H5

5th harmonic level of I1 current in 0.1%

43

I1_H7

7th harmonic level of I1 current in 0.1%

44

I1_H9

9th harmonic level of I1 current in 0.1%

45

I2_H2

2nd harmonic level of I2 current in 0.1%

46

I2_H3

3rd harmonic level of I2 current in 0.1%

47

I2_H5

5th harmonic level of I2 current in 0.1%

48

I2_H7

7th harmonic level of I2 current in 0.1%

48

I2_H9

9th harmonic level of I2 current in 0.1%

49

I3_H2

2nd harmonic level of I3 current in 0.1%

50

I3_H3

3rd harmonic level of I3 current in 0.1%

51

I3_H5

5th harmonic level of I3 current in 0.1%

52

I3_H7

7th harmonic level of I3 current in 0.1%

53

I3_H9

9th harmonic level of I3 current in 0.1%

54

U1_H2

2nd harmonic level of U1 voltage in 0.1%

55

U1_H3

3rd harmonic level of U1 voltage in 0.1%

56

U1_H5

5th harmonic level of U1 voltage in 0.1%

57

U1_H7

7th harmonic level of U1 voltage in 0.1%

58

U1_H9

9th harmonic level of U1 voltage in 0.1%

59

U2_H2

2nd harmonic level of U2 voltage in 0.1%

60

U2_H3

3rd harmonic level of U2 voltage in 0.1%

61

U2_H5

5th harmonic level of U2 voltage in 0.1%

62

U2_H7

7th harmonic level of U2 voltage in 0.1%

63

U2_H9

9th harmonic level of U2 voltage in 0.1%

64

U3_H2

2nd harmonic level of U3 voltage in 0.1%

65

U3_H3

3rd harmonic level of U3 voltage in 0.1%

66

U3_H5

5th harmonic level of U3 voltage in 0.1%

67

U3_H7

7th harmonic level of U3 voltage in 0.1%

68

U3_H9

9th harmonic level of U3 voltage in 0.1%

69

U1ph

Phase angle of U1 without scaling in 0.1deg

70

U2ph

Phase angle of U2 without scaling in 0.1deg

71

U3ph

Phase angle of U3 without scaling in 0.1deg

Modbus RTU operational information

When Modbus RTU protocol is selected IOMod acts as a slave device and waits for requests from the Modbus master. For measurement, the reading master can send a Read Holding Register request (FC 03) or a Read Input Register (FC 04). Both requests give the same value which depends on the register number only.

In order to change internal settings, the Modbus master can send a Write Single Register (FC 06) request. Request with an unsupported function code or register number out of range will be answered with the corresponding exception. Measurement results in nominal values have integer type, while results in primary values are 32-bit float type.

Table 9.1. List of registers with measurement results in nominal values.

Address

(Dec)

Designation

Parameter

Multiplier

Read/

Write

Unit

0

I1

Phase L1 current

Data * 100

R

%

1

I2

Phase L2 current

Data * 100

R

%

2

I3

Phase L3 current

Data * 100

R

%

3

I0

Calculated neutral current

Data * 100

R

%

4

U12

Calculated phase to phase voltage L1 – L2

Data * 100

R

%

5

U23

Calculated phase to phase voltage L2 – L3

Data * 100

R

%

6

U13

Calculated phase to phase voltage L1 – L3

Data * 100

R

%

7

U0

Calculated zero sequence voltage

Data * 100

R

%

8

S

Total 3 phase apparent power (S1+S2+S3)

Data * 100

R

%

9

P

Total 3 phase active power (P1+P2+P3)

Data * 100

R

%

10

Q

Total 3 phase reactive power (Q1+Q2+Q3)

Data * 100

R

%

11

PF

Total 3 phase power factor

Data * 100

R

%

12

THDU1

Total harmonic distortions of U1 voltage

Data * 100

R

%

13

THDU2

Total harmonic distortions of U2 voltage

Data * 100

R

%

14

THDU3

Total harmonic distortions of U3 voltage

Data * 100

R

%

15

THDI1

Total harmonic distortions of I1 current

Data * 100

R

%

16

THDI2

Total harmonic distortions of I2 current

Data * 100

R

%

17

THDI3

Total harmonic distortions of I3 current

Data * 100

R

%

18

I1_H3

3nd harmonic level of I1 current

Data * 100

R

%

19

I1_H5

5nd harmonic level of I1 current

Data * 100

R

%

20

I1_H7

7nd harmonic level of I1 current

Data * 100

R

%

21

I1_H9

9nd harmonic level of I1 current

Data * 100

R

%

22

I2_H3

3nd harmonic level of I2 current

Data * 100

R

%

23

I2_H5

5nd harmonic level of I2 current

Data * 100

R

%

24

I2_H7

7nd harmonic level of I2 current

Data * 100

R

%

25

I2_H9

9nd harmonic level of I2 current

Data * 100

R

%

26

I3_H3

3nd harmonic level of I3 current

Data * 100

R

%

27

I3_H5

5nd harmonic level of I3 current

Data * 100

R

%

28

I3_H7

7nd harmonic level of I3 current

Data * 100

R

%

29

I3_H9

9nd harmonic level of I3 current

Data * 100

R

%

30

U1_H3

3nd harmonic level of U1 voltage

Data * 100

R

%

31

U1_H5

5nd harmonic level of U1 voltage

Data * 100

R

%

32

U1_H7

7nd harmonic level of U1 voltage

Data * 100

R

%

33

U1_H9

9nd harmonic level of U1 voltage

Data * 100

R

%

34

U2_H3

3nd harmonic level of U2 voltage

Data * 100

R

%

35

U2_H5

5nd harmonic level of U2 voltage

Data * 100

R

%

36

U2_H7

7nd harmonic level of U2 voltage

Data * 100

R

%

37

U2_H9

9nd harmonic level of U2 voltage

Data * 100

R

%

38

U3_H3

3nd harmonic level of U3 voltage

Data * 100

R

%

39

U3_H5

5nd harmonic level of U3 voltage

Data * 100

R

%

40

U3_H7

7nd harmonic level of U3 voltage

Data * 100

R

%

41

U3_H9

9nd harmonic level of U3 voltage

Data * 100

R

%

42

P1

Phase L1 active power

Data * 100

R

%

43

P2

Phase L2 active power

Data * 100

R

%

44

P3

Phase L3 active power

Data * 100

R

%

45

Q1

Phase L1 reactive power

Data * 100

R

%

46

Q2

Phase L2 reactive power

Data * 100

R

%

47

Q3

Phase L3 reactive power

Data * 100

R

%

48

U1ph

Phase angle of U1 voltage

Data * 100

R

deg

49

U2ph

Phase angle of U2 voltage

Data * 100

R

deg

50

U3ph

Phase angle of U3 voltage

Data * 100

R

deg

51

U1

Phase L1 voltage

Data * 100

R

%

52

U2

Phase L2 voltage

Data * 100

R

%

53

U3

Phase L3 voltage

Data * 100

R

%

54

F

Frequency of phase L1 voltage

Data * 100

R

Hz

55

I4

Input I4 current

Data * 100

R

%

56

U4

Input U4 voltage

Data * 100

R

%

Table 9.2. List of registers with internal settings values.

Address

(Dec)

Designation

Parameter

Multiplier

Read/

Write

Unit

75

PC

Primary current value

Data

R/W

A

76

PV

Primary voltage value

Data

R/W

V

77

VS1

Amplitude correction factor U1

Data

R/W

-

78

VS2

Amplitude correction factor U2

Data

R/W

-

79

VS3

Amplitude correction factor U3

Data

R/W

-

80

VS4

Amplitude correction factor U4

Data

R/W

-

81

CS1

Current sensor nominal value

Data

R/W

mV

Table 9.3. List of float registers with measurement results in primary values.

Address

(Dec)

Designation

Parameter

Multiplier

Read/

Write

Unit

100

I1

Phase L1 current


R

A

102

I2

Phase L2 current


R

A

104

I3

Phase L3 current


R

A

106

I0

Calculated neutral current


R

A

108

U12

Calculated phase to phase voltage L1 – L2


R

V

110

U23

Calculated phase to phase voltage L2 – L3


R

V

112

U13

Calculated phase to phase voltage L1 – L3


R

V

114

U1

Phase L1 voltage


R

V

116

U2

Phase L2 voltage


R

V

118

U3

Phase L3 voltage


R

V

120

U0

Calculated zero sequence voltage


R

V

122

U1ph

Phase angle of U1 voltage


R

deg

124

U2ph

Phase angle of U2 voltage


R

deg

126

U3ph

Phase angle of U3 voltage


R

deg

128

S

Total 3 phase apparent power


R

kVA

130

P

Total 3 phase active power


R

kW

132

Q

Total 3 phase reactive power


R

kVAr

134

PF

Total 3 phase power factor


R

-

136

S1

Phase L1 apparent power


R

kVA

138

S2

Phase L2 apparent power


R

kVA

140

S3

Phase L3 apparent power


R

kVA

142

P1

Phase L1 active power


R

kW

144

P2

Phase L2 active power


R

kW

146

P3

Phase L3 active power


R

kW

148

Q1

Phase L1 reactive power


R

kVAr

150

Q2

Phase L2 reactive power


R

kVAr

152

Q3

Phase L3 reactive power


R

kVAr

154

PF1

Phase L1 power factor


R

-

156

PF2

Phase L2 power factor


R

-

158

PF3

Phase L3 power factor


R

-

160

F

Frequency of phase L1 voltage



Hz

162

THDU1

Total harmonic distortions of U1 voltage


R

%

164

THDU2

Total harmonic distortions of U2 voltage


R

%

166

THDU3

Total harmonic distortions of U3 voltage


R

%

168

THDI1

Total harmonic distortions of I1 current


R

%

170

THDI2

Total harmonic distortions of I2 current


R

%

172

THDI3

Total harmonic distortions of I3 current


R

%

174

I1_H3

3nd harmonic level of I1 current


R

%

176

I1_H5

5nd harmonic level of I1 current


R

%

178

I1_H7

7nd harmonic level of I1 current


R

%

180

I1_H9

9nd harmonic level of I1 current


R

%

182

I2_H3

3nd harmonic level of I2 current


R

%

184

I2_H5

5nd harmonic level of I2 current


R

%

186

I2_H7

7nd harmonic level of I2 current


R

%

188

I2_H9

9nd harmonic level of I2 current


R

%

190

I3_H3

3nd harmonic level of I3 current


R

%

192

I3_H5

5nd harmonic level of I3 current


R

%

194

I3_H7

7nd harmonic level of I3 current


R

%

196

I3_H9

9nd harmonic level of I3 current


R

%

198

U1_H3

3nd harmonic level of U1 voltage


R

%

200

U1_H5

5nd harmonic level of U1 voltage


R

%

202

U1_H7

7nd harmonic level of U1 voltage


R

%

204

U1_H9

9nd harmonic level of U1 voltage


R

%

206

U2_H3

3nd harmonic level of U2 voltage


R

%

208

U2_H5

5nd harmonic level of U2 voltage


R

%

210

U2_H7

7nd harmonic level of U2 voltage


R

%

212

U2_H9

9nd harmonic level of U2 voltage


R

%

214

U3_H3

3nd harmonic level of U3 voltage


R

%

216

U3_H5

5nd harmonic level of U3 voltage


R

%

218

U3_H7

7nd harmonic level of U3 voltage


R

%

220

U3_H9

9nd harmonic level of U3 voltage


R

%

222

I4

Input I4 current


R

A

224

U4

Input U4 voltage


R

V

Firmware upgrade over USB

To update device firmware user must:

The device should now enter Firmware Upgrade mode.

The device should then reconnect as a mass storage device (Fig. 10.1).

image-1623935180203.pngFig. 10.1. Reconnecting as a mass storage device

Delete the existing file “firmware.bin” and simply upload a new firmware file by dragging and dropping as in Fig. 10.2.

image-1623935213196.pngFig. 10.2 Mass storage device for firmware upload

Reconnect the device and check the firmware version. It should have changed.