Nitto TGF450 Series, Руководство пользователя

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User’s Manual
Rev1.0
Date:15/07/2015 User’s Manual
34 / 47
7.1.1 Command 0:Read transmitter unique identifier
Command formate
Return to the expension device type code, version number and identification number
Request: None
Response:
Byte 0: 254
Byte 1: Manufacture’s ID
Byte 2: Manufacture’s device type
Byte 3: Number of request preambles
Byte 4: Revision level of universal command
Byte 5: Revision level of transmitter document
Byte 6: Software revision level
Byte 7: Hardware revision level
Byte 8: Flags, none defined at this time
Byte 9-11: Device Indentification Number
Test of command
Send 0 command:FF FF FF FF FF 02 80 00 00 82; to request information of the instrument
Receive 0 command:FF FF FF FF FF 06 80 00 0E 00 00 FE 1A 1A 05 05 00 00 00 00 AD 18 8C
4F
7.1.2 Command 1: Read primary variable value (PV)
Command formate:
Return to primary variable value in float.
Request:None
Response:
Byte 0: Primary variable unit code
Byte 1-4: Primary variable
Remark: Set primary command to flow rate.
Test of command:
Send command 1: FF FF FF FF FF 82 9A 1A AD 18 8C 01 00 3A ;to read the IEEE754 float
value of primary variable.
Receive command 1:FF FF FF FF FF 86 9A 1A AD 18 8C 01 07 00 00 13 00 00 00 00 2A
7.1.3 Command 2:Read primary variable’s current and
percentage value
Command formate:
Read the current and percent of the primary variable, the current of primary variable always match
the AO current output of the instrument. Percent is not restricted within 0~100%, if it is beyond the
limit of primary variable, it will find the limit of the transmitter.
Request: None
Reponse:
Byte 0-3: Analog output current mA,
Byte 4-7: Percent of range
Test of command:
Send command 2: FF FF FF FF FF 82 9A 1A AD 18 8C 02 00 39; to read the current and primary
variable percent of range.