Chapter 4
Data File Organization and Addressing
4–7
The table below explains the addressing format for outputs and inputs. Note
that the format specifies
e
as the slot number and
s
as the word number.
When you are dealing with file instructions, refer to the element as
e.s
(slot
and word), taken together.
Format
Explanation
O
Output
I
Input
:
Element delimiter
O:e.s/b
e
Slot number
(decimal)
Modular Processor:
Slot 0, adjacent to the power supply in the first rack,
applies to the processor module (CPU). Succeeding slots
are I/O slots, numbered from 1 to a maximum of 30.
I:e.s/b
.
Word delimiter. Required only if a word number is necessary as noted
below.
s
Word
number
Required if the number of inputs or outputs exceeds 16 for
the slot. Range: 0 - 31
/
Bit delimiter
b
Terminal
number
Inputs: 0 to 15
Outputs: 0 to 15
Examples (applicable to the controller shown on page 46):
O:3/15
Output 15, slot 3
O:5/0
Output 0, slot 5
O:10/11
Output 11, slot 10
I:2.1/3
Input 3, slot 2, word 1
I:7/8
Input 8, slot 7
Word addresses:
O:5
Output word 0, slot 5
O:5.1
Output word 1, slot 5
I:8
Input word 0, slot 8
Default Values:
Your programming device will display an address more formally. For example,
when you assign the address
O:5/0
, the HHT shows it as
O0:5.0/0
(Output file, file #, slot 5, word
0, terminal 0).
