Lika SMAX-AI1-PRG-L2, Руководство пользователя

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SMAX MODBUS®
Starting address Hi 00 Starting address Hi 00
Starting address Lo 04 Starting address Lo 04
Quantity of registers Hi 00 Quantity of registers Hi 00
Quantity of registers Lo 02 Quantity of registers Lo 02
Byte count 04
Register 1 value Hi 00
Register 1 value Lo 0A
Register 2 value Hi 00
Register 2 value Lo
01
As you can see in the table, the value 00 0A hex, i.e. 10 in decimal notation, is
set in the register 5
Node address [0004 hex]
parameter; while the value 00
01 hex, i.e. 1 in decimal notation = baud rate 9600 bit/s, parity bit Even, is set in
the register 6
Serial com baud rate [0005 hex]
parameter. Thus the encoder
will be programmed to have node address 10 and data transmission rate = 1 =
baud rate 9,600 bit/s, parity bit Even.
The full frame needed for the request to write the value 10 dec next to the
Node address [0004 hex]
parameter (register 5) and the value 1 dec next to
the
Serial com baud rate [0005 hex]
parameter (register 6) to the Slave
having currently the node address 1 is as follows:
Request PDU
(in hexadecimal format)
[01][10][00][04][00][02][04][00][0A][00][01][13][9E]
where:
[01] = Slave address
[10] =
16 Write Multiple Registers function code
[00][04] = starting address ( Node address [0004 hex] parameter, register 5)
[00][02] = number of requested registers
[04] = number of bytes (2 bytes for each register)
[00][0A] = value to be set in the register 5, 00 0A hex = 10 dec
[00][01] = value to be set in the register 6, 00 01 hex = 1 dec
[13][9E] = CRC
The full frame needed to send back a response following the request to write the
value 10 next to the
Node address [0004 hex]
parameter (register 5) and the
MAN SMAX MB E 1.2 Modbus® interface 57 of 84