Winsen ZE07-CO, User Manual, Page: 5 / 6

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Switch command to the question & answer mode, the command line format is as follows: Table 5
Switch command to the initiative upload mode, the command line format is as follows: Table 6
Question & answer mode, the Question command line format is as follows: Table 7
Question & answer mode, the Question command line format is as follows: Table 8
Gas concentration value = (Byte4*256+Byte6) x 0.1
3. Check sum and calculation
**********************************************************************
* Function Name: unsigned ucharFucCheckSum(uchar *i,ucharln)
* Functional description: Sum check
【
Not (Byte1+Byte2+…Byte7) +1
】
**********************************************************************/
unsigned char FucCheckSum(unsigned char *i,unsigned char ln)
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte6 Byte 7 Byte 8
Start Byte Reserve
Switch
command
Q&A mode Reserve Reserve Reserve Reserve Check sum
0xFF 0x01 0x78 0x41 0x00 0x00 0x00 0x00 0x46
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte6 Byte 7 Byte 8
Start Byte
Reserve
Switch
command
Initiative
upload
Reserve Reserve Reserve Reserve Check sum
0xFF 0x01 0x78 0x40 0x00 0x00 0x00 0x00 0x47
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte6 Byte 7 Byte 8
Start Byte
Reserve Command
Reserve Reserve Reserve Reserve Reserve Check sum
0xFF 0x01 0x86 0x00 0x00 0x00 0x00 0x00 0x79
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte6 Byte 7 Byte 8
Start Byte
Command
Concentration
(High Byte)
Concentration
(Low Byte)
Reserve Reserve
Concentration
(High Byte)
Concentration
(Low Byte)
Check sum
0xFF 0x86 0x00 0x20 0x00 0x00 0x00 0x20 0x30