CONTREX CX-1200 - Manual (Page 294)

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FUNCTION (12) DATA READ PARAMETER TRACE
Use this function to read consecutive trace data from the control, re-read the last data set, or reset and re-read
the trace data from the beginning again.
Table 67 Host Transmission
Control Byte (5) definition:
00 = Reset and re-read from beginning
01 = Continue reading from end of the last data point that was read
02 = Re-read the prior data segment
Message Length = 8 bytes
Table 68 CX-1200 Response
Byte #
DESC
Decimal
1 2 3 4 5-245 246 247 248
STX Length Address Msg Error Data Field ETX CRC
Hex
2 12-248 1-99 0-255 <below> 3 0-65535
02 0C 01-63 00-FF <below> 03 0000-FFFF
Data Field per Table 68
Length = 1 + [ 4 x Number of data points ]
Byte #
DESC
Decimal
5 6 7 8 9
Status/Error Code Trace Data
Hex
0-32 -2147483648-2147483647
00-20 80000000-7FFFFFFF
Trace Read Status/Error Code - 1 byte/response
Trace Data - LONG (4 bytes/data point*)
*Maximum of 60 Data Points/Transmission ( 1 + [ 4 x 60] = 241 bytes )
Message Length = 12 to 248 bytes
Byte #
DESC
Decimal
1 2 3 4 5 6 7 8
STX Length Address Function Control ETX CRC
Hex
2 8 1-99 12 0-2 3 0-65535
02 08 01-63 0C 00-02 03 0000-FFFF