Basler Electric BE1-851 - Manual (Page 51)

Output Logic Override Control
Each output contact can be controlled directly using the select-before-operate output control function. The
virtual output logic expression that normally controls the state of an output contact can be overridden and
the contact pulsed, held open, or held closed. This function is useful for testing purposes. An alarm point
is available in the programmable alarm function for monitoring when the output logic has been overridden.
See Section 6, Reporting and Alarms, Alarms Function, for more information about programmable alarms.
Write access to control functions is required before using the select-before-operate control functions
through the HMI or ASCII command interface.
Enabling Logic Override Control
By default, logic override control is disabled. Output logic override must be enabled before the control can
be used. Enabling of the output logic override control is not possible at the front panel HMI or through
BESTCOMS. It can only be enabled through a communication port using the CS/CO-OUT=ena/dis
(control select/control operate-output override = enable/disable) command. The CS/CO-OUT command
only enables or disables override control of the output logic; it doesn’t enable or disable the outputs
themselves.
Pulsing an Output Contact
Pulsing BE1-851 outputs provides the same function as the push-to-energize feature of other Basler
Electric solid-state relays. This feature is useful when testing the protection and control system. When
pulsed, an output contact changes from the current state (as determined by the virtual output logic
expression) to the opposite state for 200 milliseconds. After 200 milliseconds, the output contact is
returned automatically to logic control.
Holding an Output Contact Open or Closed
Outputs can be forced to a closed (logic 1 or TRUE) state or to an open (logic 0 or FALSE) state. This
feature can be used to disable a contact during testing. Open or close logic override control is accessed
at Screen 2.4.1 of the HMI by entering a 0 for open or 1 for closed in the field for the output contact to be
controlled. Outputs are forced open or closed through a communication port by using the CS/CO-
OUTn=P0/1 (control select/control operate-output contact n-0/1) command.
Returning an Output Contact to Logic Control
When the output logic has been overridden and the contact is held in an open or closed state, it’s
necessary to manually return the output to logic control. Outputs are returned to logic control through
Screen 2.4.1 of the HMI. An L is entered in the field of the contact that is to be returned to logic control.
Outputs are returned to logic control through a communication port by using the CS/CO-OUTn=L (control
select/control operate-output contact n-0/1) command.
The output control commands require the use of select-before-operate logic. First, the command must be
selected using the CS-OUT command. After the command is selected, there is a 30 second window
during which the CO-OUT control command can be entered. The control selected and operation selected
syntax must match exactly or the command will be blocked. If the operate command isn’t entered within
30 seconds of the select command, the operate command will be blocked. An error message is returned
when a control command is blocked.
Output control commands are acted on immediately except when the ENA and DIS modes are used. ENA
and DIS output control command changes aren’t executed until saved with the EXIT command. Output
control status is saved in non-volatile memory and is maintained when the relay operating power is lost.
All relay responses in the following examples and throughout the manual are printed in Courier New
typeface.
1. Enable the output control feature.
>CS-OUT=ENA
OUT=ENA SELECTED
>CO-OUT=ENA
OUT=ENA EXECUTED
>E (exit)
Save Changes (Y/N/C)?
>Y (yes)
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