IM 50.560CA UA (B/4-03)
DEPOLOX
®
3 PLUS RESIDUAL ANALYZER
60
1101 13 ASCII
1110 14 Mixed data format
1111 15 Mixed data format
Additional functions of the check byte (Bit 4 through 7):
Bit (7654) Function
1000 Minimum value of the variable
0100 Maximum value of the variable
0010 Default value of the variable
0001 additional information of the variable
If no bit is set in bits 5 through 7, the actual value is written or read.
Otherwise the corresponding additional information is sent by the slave.
• Special case: With “negative confirmation,” the check byte includes
an additional information about the error occurred. With “positive
confirmation,” the check byte is set to 00Hex.
Value: Function:
01H End of address table
02H Wrong data format
04H Additional information not available
08H Variable to set not within min. and max. limits
10H reading access not permitted
20H reading access permitted but wrong password
40H writing access not permitted
80H writing access permitted but wrong password
C0H writing access not permitted (wrong operation mode)
• Number byte: Defines the number of bytes to read or to write.
• Frame Check: The sum of the control bytes of a frame is stored in the
frame check.
FC = (unsigned char) SB + SA + ZA + KB + AB
• Data unit: Includes data informations be sent by slave or master.
• Data check: The check sum of the data bytes of a frame is stored in
the data check.
CD = (unsigned char) sum of DU
• End byte: Marks the end of a frame. Value is always 16Hex.
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