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IM 50.560CA UA (B/4-03)
63
DEPOLOX
®
3
PLUS
RESIDUAL ANALYZER
3.7.4.4
Answer - Frame
The answer frame is transmitted by the slave because of a request frame
of the master.
Format of the answer frame:
Byte:
0-2
3
4
5
6
7
8
9-X Y
Z
—————————————————————————
Name: SYN SB
SA ZA KB AB FC DU DC EB
Byte:
Name:
Function:
0-2
SYN
Synchronization bytes
3
SB
Start byte 68H
4
SA
Slave address
5
ZA
Destination address
6
KB
Check byte
7
AB
Number byte
8
FC
Frame Check
9-X
DU
Data bytes
Y
DC
Data Check
Z
EB
End byte 16H
If no data format and no number of bytes (AB) is set in the request frame
in the check byte, the data format and the number of bytes are entered into
the answer frame from the address list.
Example: Request frame
00H
00H 00H 10H 07H 02H 00H 00H 19H 16H
—————————————————————————
SYN
SB SA ZA KB AB FC EB
Answer to the example Request - Frame:
00H 00H 00H 68H 07H 02H 06H 02H 79H 00H 00H 8BH 16H
——————————————————————————
SYN SB
SA ZA KB AB FC DU DC EB
3.7.4.5
Positive and Negative Confirmation
The “positive confirmation” is transmitted by the slave, if a set frame of
the master has been executed validly. A “negative confirmation” is trans-
mitted by the slave, if a set frame or a request frame couldn’t be executed
validly.
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