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350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
S5 INPUTS/OUTPUTS
CHAPTER 6: SETPOINTS
Virtual inputs
There are 32 virtual inputs that can be individually programmed to respond to input
commands entered via the relay keypad, or by using communication protocols.
Virtual input programming begins with enabling the Virtual Input Function, and selecting
the Virtual Input Type
Self-Reset
or
Latched
under
SETPOINTS > S5 INPUTS/OUTPUTS >
VIRTUAL INPUTS
. Next, the user can assign a command
On/Off
to the enabled Virtual Input
under
SETPOINTS > S4 CONTROLS > VIRTUAL INPUTS
. Referring to the Virtual Inputs logic
diagram below, a Virtual Input type can be selected to be either
Self-Reset
, or
Latched
.
When
Self-Reset
is selected and the “On” command is executed, the virtual input is
evaluated as a pulse at a rate of one protection pass. To prolong the time of the virtual
input pulse, one can assign it as a trigger source to a logic element with a dropout timer set
to the desired pulse time. Selecting the
Latched
type, will latch the virtual input state, when
the “On” command is executed.
NOTE
NOTE:
The "On" state of the Virtual Input will be retained in the case of cycling of the relay control
power supply.
PATH
:
SETPOINTS > S5 INPUTS/OUTPUTS > VIRTUAL INPUTS
The following path is available using the keypad. For instructions on how to use the
keypad, please refer to
Chapter 3 - Working with the Keypad
.
VI x NAME
Range: 14 characters
Default: Virtual IN x
This setting defines a programmable name for the Virtual Input.
VI x FUNCTION
Range: Disabled/Enabled
Default: Disabled
The Virtual Input is enabled and ready to be triggered when set to
Enabled
. All virtual
inputs will appear under the
S4 CONTROLS > SETPOINTS > VIRTUAL INPUTS
menu.
VI x TYPE
Range: Self-Reset, Latched
Default: Self-reset
When the
Self-Reset
type is selected, the Virtual Input will be evaluated for one
protection pass only, upon “On” initiation and it will reset. When the
Latched
type is
selected, the virtual input will keep the state “On” until reset command “Off” is initiated.
NOTE
NOTE:
See also the Virtual Inputs section under
S4 CONTROLS
, on how to trigger a virtual input
signal state.