ABB REF 54 Series Technical Reference Manual, General page 88

REF 54_
Feeder Terminal 1MRS750527-MUM
Technical Reference Manual, General
special modes. The first mode, recognized by a steady yellow light, indicates that
control operation has been interlocked. The second mode, recognized by a blinking
red light, indicates that the interlocking is in bypass mode (control test mode).
General control test mode
The system provides a general interlocking bypass mode (Main menu/
Control/Interl bypass) that overrides all interlocking signals. Activation of
the interlocking bypass mode activates the interlocking enable signals of all control
objects. Thus, all local control actions are possible and the enable signals
(OPENENA, CLOSEENA) of controllable objects are not checked while the objects
are commanded. As long as the mode is active, the interlocking LED on the HMI is
blinking red. Additionally, the assisting window of the display will indicate the
special condition.
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