Allen-Bradley POINT I/O PROFIBUS 1734-APB, User Manual, Page: 45 / 88

Publication 1734-UM005B-EN-P - June 2001
Communication and I/O Table Mapping 4-7
Without Grouped Modules
The table below shows an example of how the identifier bytes would
look for a configuration with a 1734-OB2E in slot 1; a 1734-IE2C in
slot 2; a 1734-OE2C in slot 3; and a 1734-IA2 in slot 4.
With Grouped Modules
If using grouped modules, the following table shows an example of
how the identifier bytes would look for a configuration with four
1734-OB2E modules.
Identifier Byte Value Description
0 20h 1734-OB2E; 1 byte out, consistency over byte
1 51h 1734-IB4; 1 byte in, consistency over byte
2 61h 1734-OE2C; 2 words out, consistency over word
3 10h 1734-IA2, 2 byte in, consistency over byte
Slot
Number Description Identifier Byte
Buffer User Parameter Data Buffer
1 1734-OB2E Byte 1 = 0x20; 1
byte output Byte 1 = 0x00; product code (high byte)
Byte 2 = 0x85; product code (low byte)
Byte 3 = 0x81; control byte (diagnostics enabled, no bit
stuffing, 1 byte of configuration data follows)
Byte 4 = 0x10; configuration data
2 1734-OB2E/grouped Byte 2 = 0x00; 0
bytes of I/O
data Byte 5 = 0x00; product code (high byte)
Byte 6 = 0x85; product code (low byte)
Byte 7 = 0xC2; control byte (diagnostics enabled, bit
stuffing module, 2 bits (channels) to store in the opened
byte.
3 1734-OB2E/grouped Byte 3 = 0x00; 0
bytes of I/O
data Byte 8 = 0x00; product code (high byte)
Byte 9 = 0x85; product code (low byte)
Byte 10 = 0xC2; control byte (diagnostics enabled, bit
stuffing module, 2 bits (channels) to store in the opened
byte.
4 1734-OB2E/grouped Byte 4 = 0x00; 0
bytes of I/O
data Byte 11 = 0x00; product code (high byte)
Byte 12 = 0x85; product code (low byte)
Byte 13 = 0xC2; control byte (diagnostics enabled, bit
stuffing module, 2 bits (channels) to store in the opened
byte.
Allen-Bradley HMIs