Rockwell Automation D64046.5.1 U MNL WIN DDMC User Manual
Page 48
Configuring SDS Instructions
Chapter 4
4-12
2.
Determine the Step Description File address.
The Step Description File address must be expressed in the manner shown
in the following table:
For the:
Use this format:
Where:
PLC-5
Nfff:eee
fff = an integer file between 10 - 999 and
eee = an element number between 0 - 999.
PLC-5/250
Nffff:eeee
ffff = an integer file between 10 - 9999 and
eeee = an element number between 0 - 9999.
If you want to start your step description file at the end of the control file,
you need to leave enough memory for the control file. The amount of
memory used by the control file depends on the number of I/O that you
control in the SDS.
We recommend that you use a separate integer file for the step description
file.
Use the following table to determine the starting address of the Step
Description File if you want the file to start at the address immediately
following the control file.
Step Description File Address
If you have this number
of I/O:
Then you must allow this number of words for
your Control File in the PLC-5:
Then you must allow for this number of words
for your Control File in the PLC-5/250:
8
68
58
16
68
58
32
68
58
For example, in the PLC-5, if your control file address is N10:0 and you
are putting your step description file for an SDS with 8 I/O at the end of
the control file, your step description file must start at N10:69.
Similarly, in the PLC-5/250, if your control file address is 1N10:0 and you
are putting your step description file for an SDS with 8 I/O at the end of
the control file, your step description file must start at 1N10:59.