Type Size Minimum Maximum
char 8 bit 0 255
byte 8 bit -128 127
short 16 bit -2
15
2
15
-1
int 32 bit -2
31
2
31
-1
uint 32 bit 0 2
32
-1
long64 64 bit -2
63
2
63
-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.
C
Energy 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)
i
pk Sample value k of the current of the phase conductor p
u
pNk Sample value k of the neutral voltage of the phase
conductor p
P
p Real power of the phase conductor p
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