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7.11
External digital inputs
The external digital inputs are digital signals that are transferred to the device via an interface from ex-
ternal systems. The external digital inputs can also be written by a barcode scanner (see
chapter 11.4.2 "Texts and process values", Page 276).
The external digital inputs are pooled into groups along with other digital signals in the "Groups" config-
uration and are then available for further use via these groups.
Device dialog box
Parameter
Parameter
Channel designa-
tion
Channel descrip-
tion
Signal inversion
Reset signal
?
Save using power
off
Reset signal
The device can monitor the connection to the Modbus master as a Modbus slave. If the connection is
down (timeout from the master), a digital signal is activated (slave timeout ...). This signal can be used
as a reset signal to set the input to a defined value.
Using the device (slave) to monitor the Modbus connection only makes sense if the external master
writes to the input. If the external master only has read access to the input, this function has no meaning.
Selection/settings
eDI ...
Use default text or enter other text.
Ext. digital input ...
Use default text or enter other text.
Inversion of the input signal
No
Yes
Digital selector
No selection
No
Yes
7 Configuration
Description
Name (abbreviation) with max. 5 charac-
ters that is used in the visualizations.
Description (designation) with max. 21
characters (for PCA3000)
The signal is not inverted.
The signal is inverted.
The reset signal (high active) sets the
digital input to a binary value of 0.
If "Yes", the current value is saved upon
switch-off (power off) and is available
again upon switch-on (power on).
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