Automationdirect.com DirectLOGIC DL205 Series User Manual page 176

Chapter 4: System Design and Configuration
Enabling I/O Configuration Check using DirectSOFT
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Enabling the I/O Config Check will force the CPU, at power up, to examine the local and
expansion I/O configuration before entering the RUN mode. If there is a change in the I/O
configuration, the CPU will not enter the RUN mode. For example, if local expansion base
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#1 does not power up with the CPU and the other expansion bases, the I/O Configuration
Check will prevent the CPU from entering the RUN mode. If the I/O Configuration check is
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disabled and automatic addressing is used, the CPU would assign addresses from expansion
base #1 to base #2 and possibly enter the RUN mode. This is not desirable, and can be
prevented by enabling the I/O Configuration check.
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Manual addressing can be used to manually assign addresses to the I/O modules. This will
prevent any automatic addressing re–assignments by the CPU. The I/O Configuration Check
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can also be used with manual addressing.
To display the I/O Config Check window, use DirectSOFT>PLC menu>Setup>I/O Config
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Check.
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B
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DL205 User Manual, 4th Edition, Rev. B
Select "Yes", then
save to disk or to
PLC, if connected to
the PLC.