Brainboxes PX-246 Spécifications télécharger pdf (Page 63)

Operation

6.7.3 PROHIBIT RETURN

Activate by pressing the MODE

‘ ’

button repeatedly until ‘Prohibit Return’ is shown on the

display, then press the TICK

‘ ’

button to confirm the change. An LED indicator beside the button

confirms this action.

The ‘Prohibit Return’ mode will prevent the load being transfer back to the S1 from the S2 supply

until the module is instructed to do so.

6.7.3.1 WAITING IN PROHIBIT RETURN

If a starting/loading request is made, the starting sequence will begin.

Starting/loading requests can be from the following sources:

• S1 supply out of limits

• Activation of an auxiliary input that has been configured to remote start on load or remote start

off load.

• Activation of the inbuilt exercise scheduler.

• Instruction from external remote telemetry devices using the RS232 or RS485 interface

6.7.3.2 STARTING SEQUENCE

To allow for ‘false’ start/load requests such as S1 brownouts, the start delay timer begins. There are

individual start delay timers for each of the different start/load request types.

Should all start/load requests be removed during the start delay timer, the unit will return to a stand-by

state.

If a start/load request is still present at the end of the start delay timer, an output to give a start signal

to an external generator controller is activated (if S2 is configured as a generator).

If the generator fails to start during the ‘S2 Fail Delay’ timer, an alarm will appear on the display which

shows Fail to Start. S2 is seen as available once the supply is within limits (if configured as a mains

supply) or had achieved loading voltage and frequency (if configured as a generator).

If a start/load request is present but the starting sequence has not begun, an input configured to ‘Auto

Start Inhibit’ could be active.

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Brainboxes PX-246 Spécifications Page 63