36 2576780000/00/02-2018
Commissioning
RS485 interface
The data from the parameter and measured value list can be
accessed via the Modbus RTU protocol with CRC check to the
RS485 interface.
Address range: 1 to 247
Factory default setting: 1
The device address is set to 1 and the baud rate is set to 115.2 kbps
by default.
Modbus Functions (Slave)
04 Read Input Registers
06 Preset Single Register
16 (10Hex) Preset Multiple Registers
23 (17Hex) Read/Write 4X Registers
The sequence of bytes is high before low byte (Motorola format).
Transmission parameters:
Data bits: 8
Parity: keine
Stop bits (Energy Meter 610/610-PB): 2
External stop bits: 1 oder 2
Number formats: short 16 bit (-2
15
to 2
15
- 1)
oat 32 bit (IEEE 754)
The system does not support broadcast (addr. 0).
The message length must not exceed 256 bytes.
Example: Reading the L1-N voltage
The L1-N voltage is stored in the measured value list under the ad-
dress 19000. The L1-N voltage is stored in FLOAT format.
The Energy Meter 610/610-PB device address with the ad-
dress = 01 is adopted here.
The “query message” then appears as follows:
Description Hex Note
Device address 01 Energy Meter 610/610-PB,
address = 1
Function 03 “Read Holding Reg.”
Start address Hi 4A 19000dez = 4A38hex
Start address Lo 38
Disp. values Hi 00 2dez = 0002hex
Disp. values Lo 02
Error Check -
The “response” from the Energy Meter 610/610-PB can then ap-
pear as follows:
Description Hex Note
Device address 01 Energy Meter 610/610-PB,
address = 1
Function 03
Byte meter 06
Data 00 00hex = 00dez
Data E6 E6hex = 230dez
Error Check (CRC) -
The L1-N voltage read back from address 19000 is 230 V.
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