Hardware reference guide

CPU Modules
35013379 02 October 2007 195
Setting the slide switch to the bottom position gives you the ability to assign
communication parameters to the port in software; the following parameters are
valid.
Key Switch The key switch, located on the front of the CPU, is used to protect memory from
programming changes while the controller is in operation. The following figure
shows the key switch.
Valid Communication Port Parameters
Baud 19,200 1,200
9,600 600
7,200 300
4,800 150
3,600 134.5
2,400 110
2,000 75
1,800 50
Parity Enable/Disable
Odd/Even
Data Bits 7 / 8
Stop Bits 1 / 2
Device Address 1 ... 247
Note: The key switch positions shown on the switch (above, left) are for reference
only and are marked on the module as indicated on the right.
Stop
Mem
Prt
Start
Stop
Mem
Prt
Start
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