janitza UMG 511 User manual

Janitza electronics GmbH
Vor dem Polstück 6
D-35633 Lahnau
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Doc. no. 1.037.021.9.c 12/2017
Power Quality Analyser
UMG 511
Modbus-address and
Formulary

Contents
General 3
Modbus 4
Modbus functions (master) 4
Modbus Functions (Slave) 4
Transfer parameters 5
Byte sequence 5
Update rate 5
Number formats 5
Symbols and definitions 5
Explanations of the measured values 6
Address list 12
Frequently required readings 12
Date and time 13
Messwerte (200ms Messfenster) 14
Mean values (float type) 18
Minimum values (float type) 22
Maximum values (float type) 24
Averaging time 28
Minimum values time stamp 32
Maximum values time stamp 34
Maximum values of mean values (float type) 40
Other values 44
Energy 52
EMAX 54
FFT fourier analysis 66

General
General
Copyright
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or reproduced mechanically or electronically and may not be copied or published in any other way without the legal, written
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Vor dem Polstück 6
D35633 Lahnau
Germany
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Disclaimer
Janitza electronics GmbH does not accept any responsibility for errors or faults within this handbook and does not accept
any obligation to keep the contents of this handbook updated.
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UMG 511
4
General
Modbus
Modbus functions (master)
As a master, the UMG511 supports the following modbus functions;
01 Read Coil Status
Reads the ON/OFF status of discrete outputs (0X references, coils) in the slave. Broadcast is not supported.
02 Read Input Status
Reads the ON/OFF status of discrete inputs (0X references) in the slave. Broadcast is not supported.
03 Read Holding Registers
Reads the binary contents of holding registers (4X references) in the slave.
04 Read Input Registers
Reads the binary contents of input registers (3X references) in the slave.
05 Force Single Coil
Forces a single coil (0X references) to either ON or OFF. When broadcast, the function forces the same coil reference in all
attached slaves.
06 Preset Single Register
Presets a value into a single holding register (4X reference). When broadcast, the function presets the same register reference
in all attached slaves.
15 (0F Hex) Force Multiple Coils
Forces each coil (0X references) in a sequence of coils to either ON or OFF. When broadcast, the function forces the same
coil reference in all attached slaves.
16 (10Hex) Preset Multiple Registers
Presets values into a sequence of holding registers (4X references). When broadcast, the function presets the same register
references in all attached slaves.
23 (17Hex) Read/Write 4X Registers
Performs a combination of one read and one write operation in a single Modbus transaction. The function can write new
contents to a group of 4XXXX registers, and then return the contents of another group of 4XXXX registers. Broadcast is not
supported.
Modbus Functions (Slave)
As a slave, the UMG511 supports the following modbus functions:
03 Read Holding Registers
Reads the binary contents of holding registers (4X references) in the slave.
04 Read Input Registers
Reads the binary contents of input registers (3X references) in the slave.
06 Preset Single Register
Presets a value into a single holding register (4X reference). When broadcast, the function presets the same register reference
in all attached slaves.
16 (10Hex) Preset Multiple Registers
Presets values into a sequence of holding registers (4X references). When broadcast, the function presets the same register
references in all attached slaves.
23 (17Hex) Read/Write 4X Registers
Performs a combination of one read and one write operation in a single Modbus transaction. The function can write new
contents to a group of 4XXXX registers, and then return the contents of another group of 4XXXX registers. Broadcast is not
supported.

UMG 511
5
General
Type Size Minimum Maximum
char 8 bit 0 255
byte 8 bit -128 127
short 16 bit -215 215 -1
int 32 bit -231 231 -1
uint 32 bit 0 232 -1
long64 64 bit -263 263 -1
float 32 bit IEEE 754 IEEE 754
double 64 bit IEEE 754 IEEE 754
Number formats
Transfer parameters
The UMG511 supports the following transfer parameters:
Baud rate : 9.6kbps, 19.2kbps, 38.4kbps, 57.6kbps, 115.2 kbps and 921.6 kbps
Data bits : 8
Parity : none
Stop bits (UMG511) : 2
Stop bits external : 1 or 2
Byte sequence
The data in the modbus address list can be called up in the
• Big-Endian (high-Byte before low-Byte) and in the
• Little-Endian (low-byte before high-byte)
format.
The addresses described in this address list supply the data in the „Big-Endian“ format.
If you require the data in the „Little-Endian“ format, you must add the value 32768 to the address.
Update rate
The modbus register addresses are updated every 200ms.
CEnergy values are processed in double format.
The energy values can be read about the Modbus addresses
in float format.
Symbols and definitions
N Total number of sample points per period
(For example, in a period of 20 ms)
k Sample value or number of samples per period
( 0 <= k < N)
p Number or identification of the phase conductor
(p = 1, 2 oder 3)
ipk Sample value k of the current of the phase conductor p
upNk Sample value k of the neutral voltage of the phase
conductor p
PpReal power of the phase conductor p

UMG 511
6
General
Explanations of the measured values
Measured value
• A measured value (in the UMG508) is a effective value which is formed over a period (measuring window) of 200ms.
• A measuring window is 10 periods in the 50Hz network and 12 periods in the 60Hz network.
• A measuring window has a start time and an end time.
• The resolution between the start time and end time is approximately 2ns.
• The accuracy of the start time and end time depends on the accuracy of the internal clock.
(Typically +- 1 minute/month)
• In order to improve the accuracy of the internal clock, it is recommended that the clock in the device is compared
with a time service and reset.
n Mean time / seconds
0 5
1 10
2 15
3 30
4 60
5 300
6 480
7 600
8 900
Mean value of measured value
• For each measured value, a sliding mean value is calculated over the selected averaging time.
• The mean value is calculated every 200ms.
• You can take the possible averaging times from the table.
Max. value of measured value
• The max. value of the measured value is the largest measured value which has occurred since the last deletion.
Min. value of measured value
• The min. value of the measured value is the lowest measured value which has occurred since the last deletion.
Max. value of mean value
• The max. value of the mean value is the largest mean value which has occurred since the last deletion.
Nominal current, voltage, frequency
• The limit values for events and transients are set by the nominal value in percentage.
Nominal current Irated
• The Irated is the nominal current of the transformers and is required for calculation of the K-factor.
Peak value negative
• Highest negative sampling value from the last 200ms measuring window..
Peak value positive
• Highest positive sampling value from the last 200ms measuring window.
Crest factor
• The crest factor describes the relation between the peak value and effective value of a periodic quantity. It serves as
a characteristic value for general description of the curve form of a periodic quantity. The distortion factor is another
example of a quantity for characterization of the difference from the pure sinusoidal form.
• Example
A sinusoidal change voltage with an effective value of 230 V has a peak value of approx. 325 V.
The crest factor is then 325 V / 230 V =1.414 .

UMG 511
7
General
Effective value of the current for phase
conductor p
Effective value of neutral conductor
current
SUI
ppNp
=⋅
Apparent power for phase conductor
• Unsigned
SSSS
A=++ 123
Total apparent power (arithmetic) Sa
• Unsigned
Effective voltage L-N
Effective voltage L-L
UUUU
Sternpunktspannung rms rms rms
=++
123
Star connection voltage (vectorial)
Real power for phase conductor

UMG 511
8
General
THD
• THD (Total Harmonic Distortion) is the distortion factor and provides the relation of the harmonic parts of an oscillation
to the mains frequency.
Distortion factor for the voltage
• M = 40 (UMG604, UMG508, UMG96RM)
• M = 50 (UMG605, UMG511)
• fund corresponds to n=1
Distortion factor for the current
• M = 40 (UMG604, UMG508, UMG96RM)
• M = 50 (UMG605, UMG511)
• fund corresponds to n=1
ZHD
• THD for the interharmonics.
• Is calculated in the product series and UMG511 UMG605.
Interharmonics
• Sinusoidal oscillations, which frequencies are not a multiple integer of the mains frequency.
• Is calculated in the product series and UMG511 UMG605.
• Calculation and measurement methods in accordance with the DIN EN 61000-4-30.
• The order number of inter harmonics corresponds to the order number of the next smallest harmonic. For example,
between the 3rd and 4th harmonic of the 3rd inter harmonics.
TDD (I)
• TDD Total demand distortion, harmonic current distor-
tion in % of maximum demand load current
• IL = Maximum demand load current
• M = 40 (UMG604, UMG508, UMG96RM)
• M = 50 (UMG605, UMG511)
Ripple control signal U (EN61000-4-30)
The ripple control signal U is a voltage (200ms measured value) which is measured at a carrier frequency specified by the
user. Only frequencies beneath 3kHz are observed.
Ripple control signal I
The ripple control signal I is a current (200ms measured value) which is measured at a carrier frequency specified by the
user. Only frequencies beneath 3kHz are observed.
xxx[0] = mains frequency (50Hz/60Hz)
xxx[1] = 2nd harmonic (100Hz/120Hz)
xxx[2] = 3rd harmonic (150Hz/180Hz)
etc.
Order number of harmonics

UMG 511
9
General
Positive sequence-negative sequence-zero sequence
• The extent of a voltage or current imbalance in a three-phase system is identified using the positive sequence, negative
sequence and zero sequence components.
• The balance of the rotation current system strived for in normal operation is disturbed by the unsymmetrical loads, errors
and equipment.
• A three-phase system is called symmetric, when the three phase conductor voltages and currents are the same size and
are displaced against each other by 120°. If one or both conditions are not fulfilled, the system is described as unsym-
metrical. By calculating the symmetrical components consisting of the positive sequence, negative sequence and zero
sequence, the simplified analysis of an imbalanced error is possible in a rotary current system..
• Imbalance is a feature of the network quality for the limits specified in international norms (EN 50160 for example).
Positive sequence
Negative sequence
Zero sequence
UU
UU
Nullsystem Lfund Lfund Lfund
=++
1
3
123
,,,
A zero component can only occur if a sum current can flow back through the main conductor.
Under difference U
(EN61000-4-30)
Unsymmetrical voltage (U0)
Unsymmetrical voltageU
U
U
Zero sequence
Positive sequence
() %
01
00
Unsymmetrical voltage
Unsymmetrical voltage
U
U
Negative sequence
Positive sequence
100%

UMG 511
10
General
Power Factor (vectorial) - Lambda
• The power factor is unsigned.
PF P
S
A
A
=
CosPhi - Fundamental Power Factor
• Only the mains frequency part is used for calculati-
on of the cosphi.
• CosPhi sign:
- = for the supply of real power
+ = for obtaining real power
PF P
S
1
1
1
==
cos( ) ϕ
CosPhi total
• CosPhi sign:
- = for the supply of real power
+ = for obtaining real power
cos( )
()(
ϕ
Sum
PPP
PPPQ
fund fund fund
fund fund fund
3
123
123
2
1
=
++
++ +ffund fund fund QQ++
23
2
)
cos( )
(
ϕ
Sum
PPPP
PPP
fund fund fund fund
fund fund fun
4
1234
123
=
+++
++
ddfund fund fund fund fund
PQQQQ+++++
4
2
12
34
2
)( )
K-factor
• The K-factor describes the increase of the eddy current losses when loaded with harmonics. For a sinusoidal load on
the transformer, the K-factor =1. The larger the K-factor, the heavier a transformer can be loaded with harmonics wit-
hout overheating.
Phase Angle Phi
• The phase angle between current and voltage of the external conductor p is calculated according to DIN EN 61557-12
and displayed.
• The sign of the phase angle corresponding to the sign of the reactive power.
Under difference I