●
Input I/O interface = low level (0 V DC or input open):
Controls only react to signals via fieldbus.
●
Input I/O interface = high level (default: +24 V DC):
Controls only react to signals of parallel interface.
Irrespective of the signal assignment of the inputs the parallel interface inputs,
the fieldbus communication with the DCS will remain intact.
Change-over to passive channel
Required user level: Specialist (4) or higher.
Device configuration M0053
Application functions M0178
Activation M0212
Fieldbus operation M1236
Default value: Commands&feedback
Setting values:
Commands&feedback
Operation commands can be executed both via fieldbus and the inputs of the parallel
interface (I/O interface).
Feedback only
Operation commands are exclusively permitted via parallel interface (I/O) interface.
Fieldbus is only used for feedback signals.
12.8. Auto change-over I/O (during fieldbus failure)
Requirements
The function is only available for a combination of additional inputs or parallel interface
(I/O) and a fieldbus or communication interface.
Properties
If this function is activated, automatic change-over to the parallel interface (I/O) will
be performed on loss of fieldbus communication.
Change-over is performed prior to activating the <Failure behaviour> or the
<EMERGENCY behaviour>.
Activate auto change-over I/O
Required user level: Specialist (4) or higher.
Device configuration M0053
Application functions M0178
Activation M0212
Auto change-over I/O M0790
Default value: Function not active
Setting values:
Function not active
<Auto change-over I/O (fieldbus failure)> function deactivated.
Function active
<Auto change-over I/O (fieldbus failure)> function activated.
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Multi-turn actuators
TR-M30X – TR-M1000X Application functions
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