Omron NV3Q Series, Руководство по подключению

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107
Modbus Slave (RTU Mode)
Section 11-1
Function Code 10: Write multiple data registers
■ Commands
■ Responses
The response will be the command message with the data from the number of
bytes to register n removed.
PT slave
address Function
code
10 hex First address,
upper byte First address,
lower byte Number of
registers to
write,
upper byte Number of
registers to
write,
lower byte Number of
bytes Register 1,
upper byte
1 byte 1 byte 1 byte 1 byte 1 byte 1 byte 1 byte 1 byte
Register 1,
lower byte
• • • • • • • • • •
Register n,
upper byte Register n,
lower byte Error check,
upper byte Error check,
lower byte
1 byte 1 byte 1 byte 1 byte 1 byte
PT slave
address Function
code
10 hex First address,
upper byte First address,
lower byte Number of
registers to
write,
upper byte Number of
registers to
write,
lower byte Error check,
upper byte Error check,
lower byte
1 byte 1 byte 1 byte 1 byte 1 byte 1 byte 1 byte 1 byte
Item Function
PT slave address Specify the slave address of the PT to which to send the message.
For slave address 20, specify 14 hex.
Function code Specify 10 hex.
First address Specify the address of the first register to write in hexadecimal.
For GDT1230, specify 04 hex, CE hex.
Number of
registers to write Send the number of data registers to write with the upper bytes
first, followed by the lower bytes. To write 20 registers, specify 00
hex, 14 hex.
Number of
bytes Specify the number of bytes from register 1 to register n.
Register 1 to n Send the data to write starting from the first data register with the
upper bytes first, followed by the lower bytes.
Error check The CRC-16 values are sent and received.