16
COMPARATO NELLO SRL
SERIAL RS458 COMMUNICATION - MODBUS (OPTIONAL)
DATA PACKAGE DESCRIPTION
The data writing/reading message should be as follows:
MODBUS PROGRAMMING ADDRESS
The address can be edited connecting each device to the Modbus network and sending a function code command 06 (FC06 – write single register) to the physical address 0 writing the new peripheral device
address in the memory log (0X4030 hex - 16432 dec).
Example: actuator programmed with the physical address 25
RS485 COMMUNICATION
Protocol Modbus – RTU
Standard EIA-RS 485 half duplex
Baud rate 19200 Baud/s
N° bit 8
Stop bit 1
Parity None
SLAVE ADDRESS FUNCTION CODE VALUE CRC WORD
SLAVE ADDRESS FUNCTION CODE VALUE CRC WORD
PARAMETER DESCRIPTION
SLAVE ADDRESS ID address of the slave equipment on the network. It must be the same for both the question and the answer..
FUNCTION CODE 0x03: Single or multiple reading of 16-bit “Holding” type log
0x10: Writing of multiple 16-bit “Holding” type log
VALUE it is the parameter address during
writing
it is the value corresponding to the required parameter during
reading
CRC WORD it is the result of the calculation performed with all the message bytes
The answer will be as follows:
DIAMANT SMART PRO / COMPACT SMART PRO / UNIVERSAL SMART PRO
