WT.050.560.001.UA.IM.0714
85
Depolox
®
3 plus ReSIDUAl ANAlYZeR
eVoQUA
W3T140188
3.7.4.3
Set - Frame
The set frame is used for writing data to a slave.
Format of the set 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
With the set frame, single words, values covering more addresses, or additional
information can be written.
If the contents of a single destination address are written, the number byte must
correspond to the number byte of the address reference list. The data format
must be set to “default” or to the data format from the address reference list.
If more variables are to be set covering more addresses, the data format must
be set to “default.” The number byte means the number of bytes to write; only
whole variables have to be written. Valid set frames are answered with a “positive
confirmation.” Invalid set frames are answered with “negative confirmation.”
Example: Setting the contents of destination address 02H of the slave 07H
to 904 (Dec).
0H 00H 00H 68H 07H 02H 06H 02H 79H 03H 88H 8BH 16H
———————————————————————————
SYN
SB SA ZA KB AB FC DU
DC EB
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