Basler Electric BE1-851 - Manual (Page 96)

Table 4-19. BESTlogic Settings for Virtual Breaker Control Switch
Function Range/Purpose Default
Mode 0 = Disable, 1 = Enable 0
Example 1. Make the following BESTlogic settings to the Virtual Breaker Control 101 element. Figure
4-43 illustrates these settings.
Logic: User
Mode: Enable
Select Before Operate Control of Virtual Breaker Control Switch
The state of each virtual selector switch can be controlled at the HMI through Screen 2.2.1. Control is also
possible through the ASCII command interface by using the select-before-operate commands CS-101
(control select-virtual control switch) and CO-101 (control operate-virtual control switch). This cannot be
done using BESTCOMS. A state change takes place immediately without having to execute an EXIT –
SAVE settings command.
The virtual switch control commands require the use of select-before-operate logic. First, the command
must be selected using the CS-101 command. After the select command is entered, there is a 30 second
window during which the CO-101 control command will be accepted. The control selected and the
operation selected must match exactly or the operate command will be blocked. If the operate command
is blocked, an error message is output.
CS/CO Command Examples:
Example 1. Read the current status of the virtual control switch.
>CO-101
C
The returned setting indicated that the switch is in the after-close state.
Example 2.
Trip the breaker by closing the trip output of the virtual control switch.
>CS-101=T
101=T SELECTED
>CO-101=T
101=T EXECUTED
Retrieving Breaker Control Switch Status from the Relay
The virtual control switch state (after-trip or after-close) can be determined through the ASCII command
interface by using the RG-STAT (reports general-status) command. This cannot be done using
BESTCOMS. See Section 6, Reporting and Alarms, General Status Reporting, for more information.
HMI Screen 2.2.1 provides switch control and also displays the current status of the virtual control
switches (after-trip or after-close). As the previous Example 1 demonstrated, the state of each virtual
selector switch can be determined using the CO-101 command in a read-only mode.
4-40 BE1-851 Protection and Control 9289900990 Rev R