Basler Electric BE1-11t - Manual (Page 123)

9424200995 Rev H 111
Virtual Control Switches (43)
Five virtual control switch (43) elements provide manual control, locally and remotely, without using
physical switches and/or interposing relays.
The five, identical virtual control switch elements are designated 43-1, 43-2, 43-3, 43-4, and 43-5.
Element logic connections are made on the BESTlogic
™Plus screen in BESTCOMSPlus® and element
operational settings are configured on the Virtual Control Switches (43) settings screen in
BESTCOMSPlus. A summary of the logic inputs and outputs and operational settings appears at the end
of this chapter.
BESTCOMSPlus Settings Navigation Path: Settings Explorer, Control, Virtual Control Switches (43)
HMI Settings Navigation Path: Settings Explorer, Control, Virtual Switch 43
BESTCOMSPlus Control Navigation Path: Metering Explorer, Control, Virtual Switches
HMI Control Navigation Path: Metering Explorer, Control, Virtual Switches
Element Operation
Virtual control switches can emulate virtually any type of binary (two-position) switch. An example would
be an application that requires a ground cutoff switch. The traditional approach might be to install a switch
on the panel and wire the output to a contact sensing input on the BE1-11t or in series with the ground
trip output of the BE1-11t. Instead, a virtual control switch can be used to reduce costs with the added
benefit of being able to operate the switch both locally through the front panel and remotely from a
substation computer or through an Ethernet connection to a remote operator’s console.
Mode
Three modes of operation are available: Switch/Pulse, Switch, and Pulse. Because switch status
information is saved in nonvolatile memory, the BE1-11t powers up with the switches in the same state as
when the BE1-11t was powered down.
Switch/Pulse Mode
In Switch/Pulse mode, each switch can be controlled to reset, set, or pulse. Assertion of the Set input
forces the output to set (logic 1). Assertion of the Reset input forces the output to reset (logic 0). Assertion
of the Pulse input toggles the output from its current state to the opposite state and then back to the
original state.
Switch Mode
In Switch mode, the switch emulates a two-position selector switch, and only set and reset commands are
accepted. Assertion of the Set input forces the output to set (logic 1). Assertion of the Reset input forces
the output to reset (logic 0).
Pulse Mode
In Pulse mode, a momentary close, spring-return switch is emulated and only the pulse command is
accepted. Assertion of the Pulse input toggles the output from its current state to the opposite state and
then back to the original state.
Customized Labels
User specified labels can be assigned to each virtual switch and to both states of each switch. The labels
can be up to 64 characters long. In the previous ground cutoff switch example, you may enable one of the
switches in the Switch mode and connect the output of that switch to the blocking input of a 59X
protection element. This would disable the ground overvoltage protection when the switch is closed (logic
1) and enable it when the switch is open (logic 0). For the application, you may set the switch label to be
BE1-11t Virtual Control Switches (43)