Virtual Inputs And Outputs - Allen-Bradley Rockwell Automation 857 User Manual

6-4
Control Functions

Virtual Inputs and Outputs

857-UM001A-EN-P – July 2009
There are four virtual inputs and six virtual outputs. The four virtual
inputs acts like normal digital inputs. The state of the virtual input
can be changed from display, communication bus and from
SetPointPS. For example setting groups can be changed using
virtual inputs.
Table 6.5 – Parameters of Virtual Inputs
Parameter Value
VI1 ... VI4 0
1
Events On
Off
NAMES for VIRTUAL INPUTS (editable with SetPointPS only)
Label String of max.
10 characters
Description String of max.
32 characters
Set = An editable parameter (password needed)
The six virtual outputs do act like output relays, but there are no
physical contacts. Virtual outputs are shown in the output matrix and
the block matrix. Virtual outputs can be used with the user's
programmable logic and to change the active setting group etc.
Unit Description
Status of virtual input
Event enabling
Short name for VIs on the
local display
Default is "VIn", n=1...4
Long name for VIs. Default is
"Virtual input n", n=1...4
Set
Set
Set
Set