Bradley Smoker PLC-5 user manual Addressing, Specifying I/O Image Addresses

4-16Addressing I/O and Controller Memory

Addressing

Valid formats for addressing data files are:

If You Want to Access	Use this Addressing Format	And See Page
Input or output bit in the I/O image table	I/O image address	4-16
Bit, word, sub-member, data block, file, or I/O image bit	Logical address	4-17
A component within a logical address by substituting the	Indirect address	4-18
value in another address
An address offset by some number of elements	Indexed address	4-20
A substitute name for an address	Symbolic address	4-21

For more information about entering addresses, see the documentation for your programming software.

Specifying I/O Image Addresses

The I/O image address corresponds to the physical location of the I/O circuit in the I/O chassis:

aI/O address identifierI = input device O = output device

bb	I/O Rack numberPLC-5/11, -5/20, -5/20E00-03 (octal)
	PLC-5/3000-07 (octal)
	PLC-5/40, -5/40L, -5/40E00-17 (octal)
	PLC-5/60, -5/60L, -5/80, -5/80E00-27 (octal)
c	I/O Group number0-7 (octal)
dd	Terminal (bit) number00-17 (octal)
To Specify this		Example
Address
Input Image Bit			I :		0	1	7	/	0	1
		I for input
		2-digit I/O rack Number
		I/O group number (0-7)
		Input number (0-7, 10-17)
Output Image Bit				O	:	0 1	7	/	0	1
		O for output
		2-digit I/O rack Number
		I/O group number (0-7)
		Output number (0-7, 10-17)

Publication 1785-UM012D-EN-P - July 2005