Lumel ND30 - Downloading Archive; 10 Serial Interfaces; RS485 INTERFACE - List of Parameters; Examples of Registers Readout and Write

ND30-09D 40 User's manual
9.4 DOWNLOADING ARCHIVE
Archived data can be downloaded via Ethernet using FTP protocol.
10 SERIAL INTERFACES
10.1 RS485 INTERFACE – list of parameters
The implemented protocol is compliant with the PI-MBUS-300 Rev G
specification of Modicon. List of ND30 meter serial interface parameters:
 identifier 0xD9
 meter address 1..247,
 baud rate 4.8, 9.6, 19.2, 38.4, 57.6, 115.2 kbit/s
 operating mode Modbus RTU
 transmission mode 8N2, 8E1, 8O1, 8N1
 max. response time 600 ms
 max. no. of registers read in a single query
- 61 – for 4-byte registers
- 122 – for 2-byte registers
 implemented functions - 03, 04, 06, 16, 17
- 03, 04 register readout
- 06 single register writing
- 16 writing of n-registers,
- 17 device identification
Default settings: address 1, baud rate 9.6 kbit/s, mode RTU 8N2
10.2 Examples of registers' readout and write
Readout of n-registers (code 03h)
Example 1. Readout of two 16-bit integer registers, starting with the register
address 0FA0h (4000) - register values 10, 100.
Request:
Device
address Function
Register address Number of registers CRC
checksum
B1 B0 B1 B0
01 03 0F A0 00 02 C7 3D