Balluff BIS M-370-000-A02, Manual, Page: 151 / 198

BIS M-62_ MANUAL
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9
Now that the command is in the Output Buffer, The Master alerts the Slave that the
command is ready. It does this by toggling
Bit 1 of the Output Buffer Control Byte (the
OBCB ) and then also toggling the same bit in the Output Buffer Data Consistence Byte
(the OBDCB )
NOTE
This bit is a toggle. So if it is 0, it is toggled to 1 to indicate a new command.
If it is 1, it is toggled to 0 to indicate a new command. If the bit is 1, setting it
to 0, and then back to 1 will cause the command to be issued twice.
(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
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:
..
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)