Balluff BIS M-370-000-A02, Manual, Page: 138 / 198

PROFIBUS INTERFACE
131
9
(See the Green changes below)
Output Buffer Input Buffer
Byte # Value Byte # Value
00:
82
Output Buffer Control Byte
(OBCB)
7 6 5 4 3 2 1 0
[1] [0] [0] [0] [0] [0]
[1] [0]
00
80 Input Buffer Control Byte
(IBCB)
7 6 5 4 3 2 1 0
[1] [0] [0] [0] [0] [0] [0] [0]
01: 00 (Always 0) 01: 00
02: 0C (Packet length in bytes) 02: 00
03:
04:
05:
06:
07:
08:
09:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
..
30: 00
06
AA
07
00
01
03
E8
00
00
00
00
00
00
00
00
00
00
..
00 (CBx Command word length MSB)
(CBx Command word length LSB)
(CBx Command Type)
(CBx Command Opcode)
(CBx Command, byte not used)
(CBx Command “Node ID”)
(CBx Command Timeout MSB)
(CBx Command Timeout LSB)
(CBx Command Not Used)
(CBx Command Not Used)
(CBx Command Not Used)
(CBx Command Not Used) 03:
04:
05:
06:
07:
08:
09:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
..
30: 00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
..
00
31:
82 Data Consistency Byte (OBDCB)
31: 80
Data Consistency Byte (IBDCB)
When the Slave sees Bit 1 of the
OBCB & OBDBC toggle, it grabs the command from the
Output Buffer. The Slave then acknowledges the command by toggling Bit 1 of the Input
Buffer Control Byte (the IBCB ) and also the same bit of the Input Buffer Data
Consistency Byte (the IBDCB ).