Siemens Sinumerik 840D sl Diagnostic Manual page 617

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Communication failure

Definitions:

The operator panel is connected to the NC and PLC via a serial bus.

This alarm occurs if the MMC is started for the first time and the NC/PLC ramp-up is not yet finished

or the communication to these components is faulty.

In connection with this alarm, all display values connected with the NC/PLC become invalid.

Such faults are normal while the controls are ramping up (e.g. after resetting).

Alarm display.

The alarm disappears automatically as soon as the fault situation has ended.

If this alarm is continuously present, a wide variety of faults may be the cause. (e.g. wire breakage,

NC/PLC not ramped up, faulty address/data transfer rate configuration of one of the bus nodes, etc.).

Program Con-

Faulty entry for hardkey 'Program' in Keys.ini.

Definitions:

The configuration in Keys.ini is wrong.

Alarm display.

In Keys.ini, the parameter ChildTask:=26 has to be set in the line KEY2.0=.

The alarm can also be acknowledged manually via diagnostics.

Program Con-

The selection is not possible. A program has to have been edited first via

the area 'Program'.

Definitions:

A program can only be selected via the hardkey program if a program has already been edited in the

program area.

Alarm display.

The alarm disappears automatically as soon as a program is edited or simulated in the program area.

The alarm can also be acknowledged manually via diagnostics.

Program Con-

SINUMERIK 840D sl, 840Di sl, SINAMICS, Diagnostics Manual (DAsl), 03/2009

Overview of Alarms

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