migra MPB PB
Large Format, Graphics Compatible Display with Profibus Interface
Page 11
microSYST Systemelectronic GmbH, Am Gewerbepark 11, 92670 Windischeschenbach
+49 9681 91960-0,
+49 9681 91960-10, [email protected], www.microsyst.de
3.5.1 Header
STX
DA
SA
FC
Start of Text
Destination Address
Source Address
Frame Control
00000010
B
1XXXXXXX
B
1XXXXXXX
B
1XXXXXXX
B
STX:
Start of text: 02
H
DA:
RS232/485 address of the internal controller:
81
H
(, 82
H
, 83
H
) = 80
H
+ device address
This is no Profibus address.
SA:
Source address: 80
H
This is no Profibus address.
FC:
Frame control: Controlling the communication sequence
Bit 7:
set permanently to 1
Bits 6-1:
reserved (0)
Bit 0:
0 -> do not send response
1 -> send response
3.5.2 Data Unit
Data Unit
Display Data
20
H
- FF
H
, 0D
H
, 0A
H
, 1B
H
, 1F
H
Data Unit:
ASCII characters, control commands
3.5.3 Trail
ETX
End of Text
00000011
B
End of text:
03
H
.