User Manual User guide

Creating an ASCII Archive File
5-11
Configuring the Chassis (Does Not Apply to MicroLogix 1000 Controllers)
The chassis configuration format consists of the keyword “RACK”, the chassis
number
and catalog number . Use this format for each expansion chassis that you
have. For example:
RACK
1 1746–A4
Keyword Chassis Number Catalog Number
Specifying the Chassis Number
The
chassis number is the location of the expansion chassis in the I/O configuration.
An SLC 500 modular processor can use up to three chassis. The chassis containing
the processor is always chassis number 1. If you have more than one chassis,
number the chassis that follow number 2 and number 3. The chassis numbers must
be specified in order; that is, specify chassis 1 before specifying chassis 2. (3 is the
largest valid chassis number for modular style hardware.)
SLC 500 Modular Controller
Chassis Number 1 Chassis Number 2 Chassis Number 3
SLC 500 Processor
The SLC 500 fixed controller has only one chassis. Therefore, always enter 1 for
the chassis number when using a fixed processor with a 2–slot (1746–A2) expansion
chassis.