Description of Controls
057-233 ISSUE: 1 Page 68 of 90
4.10.3 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 prevents the load being transfer back to the S1 from the S2 supply until the
module is instructed to do so.
4.10.3.1 WAITING IN PROHIBIT RETURN
If a starting/loading request is made, the starting sequence begins.
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
4.10.3.2 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.
When all start/load requests are removed during the Start Delay timer, the unit returns 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 appears 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 Loading 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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