Extech Instruments 407764, Руководство пользователя

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Model 407764 Version 1.4 December 2004
12
Software Protocol
Data Protocol
Baud rate: 9600bps
Byte1 Byte2 Byte3 Byte4 Byte5
02 Status Function 03
Leading byte Ending byte
Status Byte2
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
0 Fast C Normal Normal Normal 0 0 0 30-80
1 Slow A Max Full Rec 0 0 1 40-90
0 1 0 50-100
0 1 1 60-110
1 0 0 70-120
1 0 1 80-130
1 1 0 30-130
1 1 1
Function Byte3
Bit7 Bit6 Bit5 Bit4 (x10
2
) Bit3-0 (x10)
0 Normal Normal Normal
1 OVER UNDER BT
00-19
Function Byte4
Bit7-4 (x 10
0
) Bit3-0 (x10
-1
)
0
1 00-99
Command Protocol
Set time and date - Send 7 bytes
D YY MM dd hh mm ss
leading byte year month date hour min sec
Set sampling rate – Send 3 bytes
W high byte low byte
leading byte 1 – 65535 sec
Set ID code – Send 3 bytes
X high byte low byte
leading byte 1 – 65535
Get software version – Output “V” - Receive 1 byte (0 – 255)
Get system argument – Output “Y” – Receive 10 bytes
ID Code
2bytes
Version
1 byte
ID code
1 byte
Data sets
1 byte
Last address
3 bytes
Sample rate
2 bytes
Get time and date – Output “C” - Receive 6 bytes (YY+MM+dd+hh+mm+ss)
Receive 6 bytes (Sets+YY+MM+dd+hh+mm+ss+Sample rate+Records)
Get Record – Output “K”+N records”
Receive (YY+MM+dd+hh+mm+ss+Sampling rate+1
st
2
nd
…+nth record)
Erase Command: “EEE” (3 bytes) Set MAX spl; “M” (1 byte)
Switch Fast/Slow: “F” (1 byte) Stop Recording: “T” (1 byte)
Switch A/C: “A” (1 byte) Start Recording: “S” (1 byte)
Switch range: “U” (up), “P” (down) (1 byte)