ABB REB500 Operation Manual page 73

1MRK 500 124-UEN
3.8.1.1
3.8.1.2
Operation Manual
Distributed busbar protection REB500
Unblocking by the test generator takes precedence over all other
functions, i.e. blocking by an isolator or differential current alarm or
a signal applied to an optocoupler input is cancelled.
Using the test generator
In order to set or reset binary inputs and outputs using the test generator, it is
necessary to open the "Status of binary inputs/outputs" dialog. Providing the test
mode is active, the status of an input or output can be changed by simply double-
clicking on it.
Regardless of whether they are logical 0 or logical 1, inputs and outputs are
normally green, those with impressed statuses yellow and invalid ones red.
Impressed statuses are green after the display is refreshed.
Figure 51 Statuses of binary inputs and outputs in the test mode13000018
Shutting down the test generator
The test generator is deactivated by clicking on the menu item "Test mode" a
second time. All the relays are then restored to their original statuses, any latching
is reset and blocking by the test generator is cancelled.
Section 3
HMI500
65