Pulsar dBi-M, Инструкция по эксплуатации

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dBi-M INSTRUCTION MANUAL
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Register Address
The register address is a unique identification of a register in the unit. The
addresses of different types of registers are listed in the following sections. It
is worth to mention that some Modbus Master modules could implement an
offset of 1 in the addressing system (Base 0 or Base 1). If this is the case and
you want to read/write a register with address X, you must set in your
system the address X+1.
Registers
Every Register in the dBi-M is a 32-bit float (4 bytes length) formatted as
little endian (little endian registers, little endian bytes in the register). Even
the integer registers must be read in the same format (4 bytes float little
endian). In other words, for the registers with an integer value, you must
expect an integer value in float format.
There are two types of Registers in the unit, defined as
Runtime Registers
and Configuration registers (or Parameters ). Each of these types or registers
are stored in different memory maps inside the dBi-M unit, and they are
accessed (write/read operations) with different Modbus Function Codes.
Addressing 32-bit Registers on dBi-M
The floating registers can be alternatively accessed using the mirrored
addresses above 2000.
The following information and examples depict how to read/write to the 32-
Bit dBi-M registers using 16-Bit registers.
Reading/Writing 32-Bit dBi-M registers using 16-Bit registers
Non-consecutive addresses
Holding Registers