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Commissioning • Known problems / issues
Automation PC 820 User's Manual V 1.00
3. Known problems / issues
The following issue for the APC820 devices is known:
• Using two different types of CompactFlash cards can cause problems in Automation PCs
and Panel PCs. This can result in one of the two cards not being detected during system
startup. This is caused by varying startup speeds. CompactFlash cards with older
technology require significantly more time during system startup than CompactFlash
cards with newer technology. This behavior occurs near the limits of the time frame
provided for startup. The problem described above can occur because the startup time
for the CompactFlash cards fluctuates due to the variance of the components being used.
Depending on the CompactFlash cards being used, this error might never, sometimes or
always occur.