Lumel RE15, Руководство пользователя, Страница: 11 / 28

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3. FUNCTION DESCRIPTION
In the R15 controller following protocol functions have been
implemented:
Code Signification
03 Reading of n-register
06 Writing of an individual register
16 Writing of n-registers
17 Slave device identification
3.1. Reading of n-registers (code 03)
Demand:
The function enables the reading of values included in registers in
being addressed slave device. Registers are 16 or 32-bit units,
which can include numerical values bounded with
changeable processes, and the like . The demand frame
defines the 16-bit start address and the number of registers to
read-out.
The maximal number of registers read out by one command is 128
for the RE15 controller.
The signification of the register contents with address data can be
different for different device types. The function is not accessible in
the broadcast mode.
The function is not accessible in the broadcasting mode.
Example: Reading of 3 registers beginning by the register with the
6Bh address.
Address Funtion Register Register Number of Number of Checksum
Address Hi Address Lo registers Hi registers Lo
11 03 00 6B 00 03 7E LRC