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the meanings of CML:"Other Comms Fault" in FUSION Digital Power Designer's Monitor UI

user4996180
Prodigy 50 points

Dir Sir/Madam

Could you tell me the meanings of CML:"Other Comms Fault" in FUSION Digital Power Designer's Monitor UI ?

What can be the reason of this error message?

Regards,
  • 0
    TI__Genius 17090 points

    The PMBus spec lists some possible cases that could be flagged with this bit.  What it means in practice depends on the device/program. Different programs in UCD3xxx devices check and flag different communication faults (or none, in some cases).  I don't know what specific things the UCD9xxx devices check for this bit.

    If you look at the PMBus 1.3 Spec, it mentions several spots where this bit can be set:

    10.8.2 - Sending Too Few Bits

    10.8.3 - Reading Too Few Bits

    10.8.4 - Host Send Or Reads Too Few Bytes

    10.8.6 - Reading Too Many Bytes

    10.9.1. Improperly Set Read Bit In The Address Byte

    Which device/program are you using?

  • 0 in reply to Ian Bower
    Prodigy 50 points
    Ummm, Thank you, it seems to be communication error between HOST and UCD9xxx.
    There is another PMBus HOST, it should not submit any command, but I'll check...
    I'm using FUSION 7.0.11.