# 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 - 4 AC current sensor inputs according to IEC 60044-8 (nominal value 225mV) - 4 AC voltage sensor inputs according to IEC 60044-7 (nominal value 3.25/ √3 V) - Communication protocols : IEC 60870-5-103 or Modbus RTU - 32 samples per cycle - FFT-based calculation with harmonic information - RS485 interface with a switchable terminating resistor - Status and data transmission (Rx and Tx) indication. - Configurable over USB - Drag-and-Drop firmware upgrade over USB - A small-sized case with a removable front panel - DIN rail mount - Operating temperature: from -30 to +70°C - Power Requirements: 12-24 VDC ### Common configuration information 1. Nominal system frequency. In order to get correct three-phase system measurements, a user must select nominal system frequency – either 50 Hz or 60 Hz. 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 225 mV for the current sensor and 3.25√3 V (1.876 V) 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 ](https://wiki.elseta.com/uploads/images/gallery/2022-10/embedded-image-wel2axjd.png)Fig. 4.1. IOMOD 4CS4VS internal structure and connection diagram ### Technical information
**System**
1.Dimension101 x 119 x 17.5 mm
2.CaseABS, black
3.Working environmentIndoor
4.Working temperature-30 | +70
5.Recommended operating conditions 5 – 60°C and 20 – 80%RH;
6.ConfigurationUSB – configuration terminal via com port
7.Firmware upgradeUSB – mass storage device
**Electrical specifications**
8.Inputs16-bit resolution, Input resistance: ~1 MOhm Input capacitance: ~170 pF Input Ranges: ±10 V (amplitude); Nominal values: - Current input: - 225 mV (rms); - Voltage input: - 1.876 V (rms); Overvoltage protection of all inputs up to ±20 V (amplitude)
**Power**
9.Power Supply9 V to 33 V
10.Current consumption40 mA @ 12 VDC, 20 mA @ 24 VDC
### RS485 Interface IOMod 4Cs4Vs has an integrated 120 Ω 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 diagram](https://wiki.elseta.com/uploads/images/gallery/2022-10/embedded-image-dwo5ju1g.png)Fig. 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 ](https://wiki.elseta.com/uploads/images/gallery/2022-10/embedded-image-ujdsgen8.png)Fig. 7.1. Unsuccessful device software installation error A user then should manually install drivers by selecting a downloaded driver folder: - Go to Control Panel -> Device Manager; - Select a failing device; - Press “Update driver software”; the screen as in Fig. 7.2. should appear: ![Fig. 7.2. Device driver software update message ](https://wiki.elseta.com/uploads/images/gallery/2022-10/embedded-image-a8xkogv4.png)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 content](https://wiki.elseta.com/uploads/images/gallery/2022-10/embedded-image-5juui1h0.png)Fig. 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 menu](https://wiki.elseta.com/uploads/images/gallery/2022-10/embedded-image-k72g5k9u.png)Fig. 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 NameSubmenuValuesDefault 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 AddressSet 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 - - -
\[9\]DiagnosticsRaw input values - -
\[0\]ExitExit 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: 3. 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. 4. 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 5. 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.** **TYPE** **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.DesignationMeasured 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: - Enter the main configuration menu; - Enter the Firmware update screen by pressing \[8\]; - Confirm the update by pressing \[1\]; The device should now enter Firmware Upgrade mode.

It is recommended to close the terminal window after entering firmware upgrade mode

The device should then reconnect as a mass storage device (Fig. 10.1). [![image-1623935180203.png](https://wiki.elseta.com/uploads/images/gallery/2021-06/scaled-1680-/image-1623935180203.png)](https://wiki.elseta.com/uploads/images/gallery/2021-06/image-1623935180203.png)Fig. 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.png](https://wiki.elseta.com/uploads/images/gallery/2021-06/scaled-1680-/image-1623935213196.png)](https://wiki.elseta.com/uploads/images/gallery/2021-06/image-1623935213196.png)Fig. 10.2 Mass storage device for firmware upload Reconnect the device and check the firmware version. It should have changed.