Two indicators at the top of the front panel of the Engineering Card indicate the operational status of the card: 3.2.1 - Green LED A continuously illuminated LED indicates that the correct dc power is connected to the rack via the DC Input Card. A flashing LED at approximately two second intervals, indicates a low dc power input level. A flashing LED at approximately 0.5 second intervals, indicates a hardware fault.The Engineering Card push-buttons control various functions depending on the type of control card fitted and whether the Engineering Key is fitted.When the up push-button ( ) is operated, it increases the value of those functions that can be adjusted.
Provides an indication
of the operation of the Engineering Card communications status as follows: Off: Engineering Card functioning correctly and the engineering functions are locked. Operators functions are operational to allow the checking of various control card settings. On: Engineering Card functioning correctly and the engineering functions are unlocked enabling changes to be made to the operation of a selected control card. Flashing: Indicates that a control card has been withdrawn from the rack, there is a communications error or that an external PC running the engineering interface software is communicating with the control cards. Note: To reset this indication, insert the Engineering Key briefly and remove it again.
4 Operation of the Up and Down Push-buttons Simultaneously
This operation can only be used if a serial printer is connected to the rack. When the up ( ) and down ( ) push-buttons are operated simultaneously a print out command is selected of the control card configuration and status. 3.3.5 Accept Push-button ( ) When the accept push-button ( ) is operated during any of the engineers functions, this button confirms adjustments that have been made and then cancels that function. 3.3.6 Reject Push-button ( ) When operated during any of the engineers functions and providing the accept ( ) push-button has not been operated, the reject push-button ( ) cancels adjustments that have been made. This push-button is also used to deselect a selected function.
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