position. The third parameter “Middle” is normally set equal to the digital converted voltage when the
steering actuator is set in the straight forward driving position.
The default values meet most analogue sensors with standard 0.5 to 4.5 signal span.
Analogue Input Drift Compensation
A radiometric compensation algorithm has been implemented to ensure robustness of the checks even
in situations where the Vext-supply voltage fluctuates from 4.80 to 5.20 V DC. Range checking is done on
the compensated value. Compensation is only required for analogue sensors without built-in
compensation - hence sensors whose output is directly depending on the Vext-supply supply voltage.
The objective is to reduce the risk of drift in calibration value as a result of aging or temperature of the
electronic circuits. To select compensation in PVED-CL or not, use parameter
AnalogChannelCompensation.
Compensation can be applied to either input or both of them.
Symbol
Index
Default
Value range
AnalogChannelCompensation
65098
0
0=None, 1=AD1, 2=AD2, 3=Both AD1 and AD2
Transmitting the Voltage Readings on CAN
In order to calibrate the AD inputs from steering devices or steering actuator position signals, the read AD
value shall be echoed back to user via the CAN bus.
Sending a StartStopStatus status set 1 message will invoke the PVED-CL to send out a status message
with data [AD1][AD2][AD3][Xsp]. AD1 and AD2 are the analogue PVED-CL interface ports. AD3 is the
spool position reading. Xsp is the spool set-point calculated by the PVED-CL.
Operation Manual
PVED-CL Controller for Electro-Hydraulic Steering, Version 1.38
Installation
©
Danfoss | May 2016
11025583 | AQ00000216en-US0302 | 35