Wire failure
Wire failure
Wire break
Lower failure
limit
Upper failure
limit
Input signal
(mA, °C,b, %)
t
MPU wire break (menu 4550)
The MPU wire break function is only active when the genset is not running. In this case an alarm will be raised if the wire connection
between the AGC and MPU breaks.
Stop coil wire break (menu 6270)
The alarm will occur when the stop coil is not activated (generator is running) and the input is deenergised.
6.41 External analogue set points
The genset can be controlled from external set points. The external analogue set point inputs are only available if hardware option
M12 is selected. A digital input must be used to activate each external set point.
Five inputs can be selected using the PC utility software (USW):
Input
Ext. set point active condition*
Ext. frequency ctrl Stand-alone generator or GB opened
Ext. power ctrl Parallel to mains
Ext. voltage ctrl Stand-alone generator or GB opened
Ext. PF ctrl Parallel to mains
Ext. VAr ctrl Parallel to mains
*Note: The controller set points are ignored if the condition is not present. For example, it is not possible to use the frequency
controller when paralleling to the mains.
The table below shows the set points that are possible for external analogue inputs.
Controller
Input voltage Description Comment
Frequency +/-10 V DC f
NOM
+/-10 % Active when MB is OFF
Power +/-10 V DC P
NOM
+/-100 %
Voltage +/-10 V DC U
NOM
+/-10 % Active when GB is OFF
Reactive power +/-10 V DC Q
NOM
+/-100 %
Power factor ÷10 V…0…10 V DC 0.6 capacitive…1.0…0.6 inductive
The external set points can be used in all genset modes, when auto or semi-auto mode is selected.
DESIGNER'S HANDBOOK 4189341275A EN Page 166 of 196
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