Danfoss PVED-CLS, Руководство пользователя, Страница: 169 / 182

© Danfoss | August 2018 AQ00000211 |
169
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.
Name
A
d
d
res
s
D
at
a t
yp
e
Description of parameter
Hydraulic Config Signature
P40
U16
Signature CRC value for named sector
SEHS FDA Signature
P42 Signature CRC value for named sector
Valve Calibration Data Signature P44 Signature CRC value for named sector
CAN WAS Calibration Data Signature P46 Signature CRC value for named sector
Analogue Sensor Calibration Data
Signature
P48 Signature CRC value for named sector
Peripherals Config Signature
P50 Signature CRC value for named sector
SEHS Protocol Data Signature P52 Signature CRC value for named sector
Internal monitoring Signature P54 Signature CRC value for named sector
Vehicle Geometry Signature P56 Signature CRC value for named sector
GPS Config Signature
P58 Signature CRC value for named sector
STW Config Signature P60 Signature CRC value for named sector
AUX Config Signature P62 Signature CRC value for named sector
Table 80
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 “5CFEA40197FF69001900
AF12 ”.
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 .