Comet T4311, Инструкция по эксплуатации, Страница: 14 / 20

14 IE-SNC-T43(4)11-02
Modbus registers of the transducer
Variable Unit Address Format Size Status
Measured temperature [°C] 0x0031 Int*10 BIN16 R
Address of transducer [-] 0x2001 Int BIN16 R/W*
Code of communication speed [-] 0x2002 Int BIN16 R/W*
Serial number of transducer Hi [-] 0x1035 BCD BIN16 R
Serial number of transducer Lo [-] 0x1036 BCD BIN16 R
Version of Firmware Hi [-] 0x3001 BCD BIN16 R
Version of Firmware Lo [-] 0x3002 BCD BIN16 R
Explanation:
•
Int*10 register is in format integer*10
•
R register is designed only for reading
•
W* register is designed for write, detailed see description function 16 (0x10): Setting of
several 16-bit registers (Write Multiple Registers)
* In case there is a need for reading of measured values from transducer with higher resolution than
one decimal, measured values in transducer are stored also in „Float“ format, which is not directly
compatible with IEEE754.
Example of communication
In all examples communication with transducer at address 01h is supposed
Reading of temperature, address 0x0031
Modbus command:
transducer address: 01
reading of 16-bit registers 03
initial address Hi 00
initial address Lo 31
number read registers Hi 00
number read registers Lo 01
By link are physically sent: 01 03 00 30 00 01 84 05
Received response from transducer: 01 03 02 00 F4 B9 C3
transducer address: 01
reading of 16-bit registers 03
Number Byte 02
State of register Hi 00
State of register Lo F4 (0x00F4 = 244 = 24.4 °C)
Modbus CRC Lo B9
Modbus CRC Hi C3