V2.01
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14.3 Interface parameters
Baud rate (baud)
Parity
Data bits
Stop bits
4800,9600,19200,
38400
even, odd, none
8
2 for parity none
otherwise 1
The maximum data length of a Modbus transmission is 256 bytes. This results in a user
data length of 253 bytes.
The number of data bits and stop bits is defined in the Modbus definition. Baud rates of
less than 4800 baud are possible by definition, but not implemented at present. The inter-
face parameters can only be configured on the device (not via bus).
14.4 Device settings
The settings are read with the 0x04 command (read input registers) as shown in Table 1.
Writing is not possible at present.
Address Words Description
Value
Format
0xD002
2
Primary transformer measuring voltage 0 - 999999 V
float
0xD004
2
Secondary transformer measuring
voltage
0 - 999 V
float
0xD006
2
Primary transformer measuring current 0 - 999999 A
float
0xD008
2
Secondary transformer measuring
current
1 A / 5 A
float
0xD00A 2
Target CosPhi 1
-1.0 - +1.0
float
0xD00C 2
float
0xD00E
2
Target CosPhi for energy recovery
(fixed setting)
-1.0 - +1.0
float
0xD010
2
Target CosPhi for message "Compensa-
tion unit too small"
-1.0 - +1.0
float
0xD012
2
Connected phase voltage measurement 0=L1N // 1=L2N
// 2=L3N // 4=L12
// 5=L23 // 6=L31
unsigned
long
0xD014
2
Connected phase current measurement 0=L1 // 1=L2 //
2=L3 // 3=-L1 //
4=-L2 // 5=-L3
unsigned
long
0xD016
2
0xD018
2
0xD01a
2
0xD01c
2
General
Data point description for the Modbus protocol
