8.7.6 Emergency stop
You can configure one of the controller's digital inputs as the emergency stop.
When this input is present, the alarm is always enabled. The alarm parameters are not
visible. The alarm action is Trip generator breaker and shutdown engine, latch enabled.
low
high
Digital
input
time
t
delay
Assign the Emergency stop input under Configure > Input/output. Select the hardware module, then select the input to configure.
Function
I/O Type Details
Alarm system > Additional
functions > Emergency stop
Digital input Continuous
Wire the emergency stop digital input so that it is normally activated. If
the emergency stop digital input is not activated, then controller
activates the Emergency stop alarm.
CAUTION
The Emergency stop is part of the safety chain, and this digital input function should only be used to inform the controller of
the emergency stop. However, the controller's emergency stop input cannot be used as the system's only emergency stop.
For example, if the controller is unpowered, it cannot respond to the emergency stop digital input.
8.7.7 Overspeed
These two alarms are for overspeed protection.
The alarm response is based on the genset speed, as measured by the MPU/W/NPN/PNP
input.
Configure these parameters under Configure > Parameters > Engine > Protections > Overspeed #, where # is 1 or 2.
Table 8.31
Default parameters
Parameter Range Overspeed 1 Overspeed 2
Set point 10 to 150 % of nominal speed 110 % 120 %
Delay 0 s to 3 min 5 s 1 s
Enable Not enabled, Enabled Not enabled Not enabled
Latch Not enabled, Enabled Not enabled Enabled
Action Warning Trip generator breaker and shutdown engine
INFO
In addition to these overspeed alarms, one of the controller's digital inputs can be connected to hardware that detects
overspeed. A customised alarm for overspeed can then be configured on that digital input.
DESIGNER'S HANDBOOK 4189340911K UK Page 313 of 521
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