Tonghui Electronics TH7105, Руководство по эксплуатации

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99
the address.
5) High Byte Count
The number of bytes represents the total number of bytes written for this operation. If the data is of type
char, the number of bytes is 0x0001; if the data is of type int, the number of bytes is 0x0002; if the data is of
type float, the number of bytes is 0x0004.
6) Low Byte Count
The number of bytes represents the total number of bytes written for this operation.
7) CRC High and CRC Low
CRC 16-bit check, using the look-up table method for CRC check.
6.4.2 MODBUS Write Commands
6.4.2.1
Address 2 (Output Switch)
1) Commands Description
This command is used to control the instrument output. The instruction data byte bit corresponds to the
function of the instrument as shown in below table.
3) Send Instruction Format
Instrument
address
Function
code
High
address
Low
address
High
bytes
Low
bytes
Number
of data
Data
byte 1
Data byte 2 CRC Low CRC High
1~32 0x10 0x00 0x02 0x00 0x01 0x02 0x00 0x00or0x01
Calculated based on
the first 9 bytes
4) Return Instruction Format
Data Byte Instrument Output Function
0x00
Turn off the AC output and the command is only valid under the measurement display
page.
0x01
Turn on the AC output and the command is only valid under the measurement display
page.
Instrument
address
Function
Code
High Address Low Address High bytes Low bytes CRC Low CRC High
1~32 0x10 0x00 0x02 0x00 0x01
Calculated based on the first 6
bytes
Data Byte Instrument Output Function
0x00
This command is used to set the measure mode to manual mode. The command is invalid
when the output is turned on.