Datalogic GWY-01-PBS-01, Reference Manual

Page: 77 / 101

PROFIBUS INTERFACE
69
5
Now the Slave places the final fragment into the Input Buffer and toggles Bit 0 of the IBCB &
IBDCB to indicate the new fragment is ready.
Since it is the final fragment, the Slave also now clears
Bit 3 of the IBCB & IBDCB :
(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
83
Input Buffer Control Byte
(IBCB)
7 6 5 4 3 2 1 0
[1] [0] [0] [0] [0] [0] [1] [1]
01: 00 (Always 0) 01: 00 (Always 0)
02: 0C (Packet length in bytes) 02: 06 (Packet length in bytes)
03:
04:
05:
06:
07:
08:
09:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
..
30: 00
06
AA
05
00
01
03
E8
00
00
00
32
00
00
00
00
00
00
..
00 (CBx Command word length MSB)
(CBx Command word length LSB)
Minimum of 6 words
(CBx Command Type) Always AA
(CBx Command Opcode)
0x05 = Read Tag Data
(CBx Command, byte not used)
(CBx Command “Node ID”)
(CBx Command Timeout MSB)
(CBx Command Timeout LSB)
0xE8 = 1000 ms timeout
(CBx Command Start Address MSB)
(CBx Command Start Address LSB)
address 0
(CBx Command Length MSB)
(CBx Command Length LSB)
50 bytes 03:
04:
05:
06:
07:
08:
09:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30: 02
02
02
02
02
02
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
(CBx Response Data Byte 45)
(CBx Response Data Byte 46)
(CBx Response Data Byte 47)
(CBx Response Data Byte 48)
(CBx Response Data Byte 49)
(CBx Response Data Byte 50)
31: 82 Data Consistency Byte (OBDCB) 31: 83 Data Consistency Byte (IBDCB)