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Entry type: FAQ Entry ID: 72307954, Entry date: 05/03/2013
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SINUMERIK HMI-Advanced: Reading in or reading out data via the serial interface results in a V24 error

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Question
When reading in or reading out data via the serial interface, the error message "Error when opening the COM interface" is output. What countermeasure is available?

Answer
Use case
When reading in or reading out data via the serial COM 2 interface, a V24 error "Task ended with error" is output. If an attempt is then made to read-in or read-out data via the serial COM 1 interface, the error message "Error when opening the COM interface" is output.

Cause
If an error occurs when transferring data via the COM 2 interface, then the COM 1 interface is also blocked. When attempting to establish the communication via the COM 1 interface, then this results in the error message "Error when opening the COM interface".

Countermeasure
Lock a COM2 interface that either has an error or has a malfunction, so that this is hidden on the machine screen.

File Directory Chapter Entry Value
DINO.INI F:\HMI_ADV\DINO.INI [FUNCTION] COM2_LOCKED_BY_OEM =1

After the change and restarting the HMI-Advanced software, COM 2 can no longer be selected in the interface setting, and the blocked COM 1 has been resolved.

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