Fig. 6-11: Status Byte; Fig. 6-12: Assignment Of The M-Keys At The Profibus Dp - Bosch Rexroth IndraControl VDP 16.1 Series Project Planning Manual

VDP 16.1, VDP 40.1 and VDP 60.1
Bit 7 Bit 6 Bit 5 Bit 4
R8 R7 R6 R5
DOK-SUPPL*-VDP16/40/60-PR02-EN-P
In byte 2 a status is transmitted with the following meaning:
Value Meaning
0x00 No error
0x01 Directly after Reset, during the self test a M-Key is pressed
0x02 Incoming request telegram before the current keypad telegram is
finished
Fig. 6-11: Status byte
Value 0x01 means that during the self test executed directly after the
reset, a M-Key was recognized as pressed. As, however, after a reset no
key is activated, thus, a defective key can be recognized.
In byte 3 a CRC is transmitted. To calculate byte 3, byte 0 is bitwise linked
with byte 1 by XOR. Then, the result is bitwise linked with byte 2 by XOR.
After that, this result is transferred as CRC in byte 3.
The M-Keys are output at the optionally provided connection XDP (see
7-6
page 7-6) as output bits of a PROFIBUS DP slave, so that they can be
read by a connected PROFIBUS DP master as inputs. (The
corresponding GSD file is archived in folder C:\SUPPORT\PROFIBUS.)
Pressed M-Keys have the value "0"; if the keys are not pressed, they
have the value "1".
Byte 1
Bit 3 Bit 2 Bit 1
R4 R3 R2
Fig. 6-12: Assignment of the M-Keys at the PROFIBUS DP
Display and Operating Components
Bit 0 Bit 7 Bit 6 Bit 5
R1 L8 L7 L6
Byte 0
Bit 4 Bit 3 Bit 2 Bit 1
L5 L4 L3 L2
6-9
Bit 0
L1