Example - Danfoss PVED-CLS User Manual

ENGINEERING TOMORROW
1. Verify the changes to the sector by comparison of desired data to read-back inverted data.
2. Calculate the signature CRC as CRC-CCITT (sector data + PSAC). See example.
3. Write signature CRC to signature CRC address (see).
The PSAC is a 4-character hex-string. The signature CRC is calculated by adding the PSAC data as if it was the last 4
bytes of the sector data.
Hydraulic Config Signature
SEHS FDA Signature
Valve Calibration Data Signature
CAN WAS Calibration Data Signature
Analogue Sensor Calibration Data
Signature
Peripherals Config Signature
SEHS Protocol Data Signature
Internal monitoring Signature
Vehicle Geometry Signature
GPS Config Signature
STW Config Signature
AUX Config Signature
17.5.5

Example

Example for calculating CRC signature for "Valve calibration data" (see section 17.5.2)
The serialized sector data is "5CFEA40197FF69001900".
In this example PSAC = 12AFh is used. Note that this PSAC is not valid and will be detected as an incorrect PSAC by
the PVED-CLS.
The signature CRC is calculated as the CRC-CCITT for "5CFEA40197FF69001900AF12".
In this example, the Signature CRC turns out to be is 0xE0BD.
The low byte (BDh) shall be stored at P44 and the high byte (E0h) at P45
Important
Contact your local technical support at Danfoss Power Solutions for the correct PSAC values.
© Danfoss | August 2018
Name
P40
P42
P44
P46
P48
P50
P52
P54
P56
P58
P60
P62
Table 80
Description of parameter
Signature CRC value for named sector
Signature CRC value for named sector
Signature CRC value for named sector
Signature CRC value for named sector
Signature CRC value for named sector
Signature CRC value for named sector
U16
Signature CRC value for named sector
Signature CRC value for named sector
Signature CRC value for named sector
Signature CRC value for named sector
Signature CRC value for named sector
Signature CRC value for named sector
AQ00000211 | 169