Idle Mode - Deif SGC 420 Mk II User Manual

8.4

Idle mode

The purpose of the idle mode function is to allow the engine to operate at idle speed before ramping up to rated speed.
You can activate idle mode using a digital input or a timer. If you have configured an input and a timer for idle mode, then
the timer is overruled. The output assigned to idle mode can be continuous or pulse.
Configuration of digital input and output
1. Go to Digital Inputs and select one of the digital input tabs.
2. Select Idle Mode Enable as the source.
3. Select the polarity as Close To Activate or Open To Activate.
4. Go to Digital Outputs and select the source:
a. To use a continuous signal, select Idle Mode On as the source.
b. To use a pulse signal, select Idle Mode On Pulse and Idle Mode Off Pulse as two separate sources.
5. If you have selected a pulse signal as an output, you must configure the timer for the pulse.
a. Go to Engine and select Speed Monitoring.
b. Configure the Idle Mode Pulse Time.
6. In the Speed monitoring tab, configure the Idle to Rated Delay Time.
Idle mode is activated when the engine is started and the digital input is activate (open or close to activate). The under-
voltage, under-frequency, and under-speed protections are not active during idle running.
The Idle to Rated Delay timer starts when the idle mode input is deactivated. The genset starts to ramp up, and when the
timer expires, the genset operates at nominal speed. The under-voltage, under-frequency, and under-speed protections are
also activated.
Configuration of timers
You can only activate idle mode with timers, when the Idle Mode Enable is deactivated.
1. Go to Digital Inputs and make sure that Idle Mode Enable is not selected as the source for a digital input.
2. Go to Digital Outputs and select the source:
a. To use a continuous signal, select Low Idle Mode as the source.
b. To use a pulse signal, select Idle Mode On Pulse and Idle Mode OFF Pulse as two separate sources.
3. If you have selected a pulse signal as an output, you must configure the timer for the pulse.
a. Go to Engine and select Speed Monitoring.
b. Configure the Idle Mode Pulse Time.
4. Go to Engine and select Speed Monitoring.
5. Configure the Startup Idle Mode Time timer.
Idle mode is activated when the engine starts. The under-voltage, under-frequency, and under-speed protections are not
active during idle running.
The engine operates in idle mode until the Startup Idle Mode Time timer expires. When this timer expires, the Idle to Rated
Delay Time timer starts. The genset ramps up, and operates at nominal speed when the Idle to Rate Delay Time timer
expires. The under-voltage, under-frequency, and under-speed protections are also activated.
If the controller is in manual mode during idle running, and you push the start button, the controller stops the idle running,
and starts to ramp up the genset.
Stop sequence for idle mode
You can also activate idle mode during the stop sequence. Go to Engine > Speed Monitoring > Stopping Idle Time
to configure the timer for the idle stop time. If you set the timer to 0 seconds, idle mode is not activated during the stop
sequence. The under-voltage, under-frequency, and under-speed protections are not active in idle mode.
User manual 4189341360A EN Page 80 of 99