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An intelligent weight controller using Profibus
#define WEIGHT CURVE
OxBl
f* Curve data
f* data
byte 1
total number of packets [1 .. Nl
byte 2
packet number of this packet Il .. NI
*f
i f (packet number •• 1)
byte 3
MSB channel number
byte 4
LSB channel number
byte 5
MSB sample frequency
byte 6
LSB sample frequency
MSB number of points
byte 7
byte 8
LSB number of points
byte 9
MSB data word 1
byte 10
LSB data word 1
byte 11
MSB data word 2
12
byte
LSB data word 2
··
·
·
·
·
byte 19
MSB data word 6
byte 20 • LSB data word 6
if (packet number :> 1)
byte 3 z M5B data word (packet_number-l)*9+7
byte 4
LSB data word (packet_number-l)*9+7
byte 5 • MSB data word (packet_number-l)*9+S
byte 6
LSB data word (packet_number-l)*9+9
byte 19 • MSB data word (packet number-l}*9+15
byte 20 .. LSB data word (packet:number-l)*9+15
*f
#define
I'"
OxB2
f* Weight data
*f
data
byte
byte
byte
byte
byte
byte
1
2
3
4
5
6
MSB
- LSB
MSB
LSB
- MSB
LSB
cup number
cup number
weight
weight
weight
weight
lowest
lowest
second
second
selected channel
selected channel
lowest selected channel
lowest selected channel
byte n-l_ MSB weight highest selected channel
byte n ~ LSB weight highest selected channel
*f
/* Additional error messages (see WEIGHT ERROR) ****************************/
Hdefine UNKNOWN COMMAND
OxFF
- /* unknown command in frame
*/
Hdefine ILLEGAL=LENGTH
OxPE
/* Wrong number of bytes in frame*/
85
~
ELLIPS