8.10.
Additional inputs for fieldbus
Actuator controls with fieldbus interface can be equipped with additional digital and
analogue inputs. Depending on the version, up to 6 digital inputs (default: 24 V DC)
and two analogue 0/4 –20 mA inputs are available.
If additional inputs are available, operation commands can be sent both via fieldbus
and the additional inputs.
For manual change-over between fieldbus interface and the additional inputs, a
digital input has to be available and configured.
For automatic change-over (in the event of fieldbus failure), the <Auto change-over
I/O (fieldbus failure> function is required.
Configuration of additional inputs
Required user level:
Specialist (4)
.
Device configuration M0053
I/O interface M0139
Digital inputs M0116
Analogue inputs M0389
Example
●
Use digital inputs DIN 2 to 4 for operation commands:
Signal DIN 2 M0120
=
CLOSE
Signal DIN 3 M0119
=
OPEN
Signal DIN 4 M0118
=
STOP
●
Use digital input DIN 6 for manual change-over:
Signal DIN 6 M0121
=
I/O interface
(wiring diagram designation:
I/O inter-
face
)
Information
The logic for the digital inputs may be inverted. Depending on the parameter setting
(e.g.
Coding DIN 6 M0128
), the input is either
High active
or
Low active
. Default
setting is
High active
.
Manual change-over via I/O interface input
Switching behaviour for coding
High active
(Default factory setting)
●
Input
I/O interface
= low level (0 V DC or input open):
Actuator controls react to operation commands via fieldbus only.
●
Input
I/O interface
= high level (standard: +24 V DC):
Actuator controls react to additional input signals only.
Irrespective of the signal assignment of the additional inputs, the fieldbus
communication with the DCS will remain intact.
8.11.
Combination of fieldbus-parallel interface
Actuator controls with fieldbus interface may be additionally equipped with a parallel
interface. Depending on the version, up to 6 digital inputs (default: 24 V DC) and up
to two analogue 0/4 –20 mA inputs are available via parallel interface.
For this combined version, operation commands can be executed both via fieldbus
and the inputs of the parallel interface (I/O interface).
For manual change-over between fieldbus interface and parallel interface, a digital
input has to be available and configured.
The <Auto change-over I/O (during bus failure)> function is required for automatic
change-over (bus failure).
Configuration of I/O interface inputs
Required user level:
Specialist (4)
Device configuration M0053
I/O interface M0139
76
Actuator controls
Application functions
ACV 01.2/ACVExC 01.2 Profibus DP
