Product Manual CANcockpit
TU00-0726-5111102 Technische Änderungen vorbehalten 0609 Technical details subject to change 5.2 - 22
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CANopen-Specification for CANcockpit
Write EEPROM Data Record to EEPROM
Writing a data record to EEPROM involves the following steps:
1. Check object 2006h and if the EEPROM is not busy, write one Record as specified above into this object of CANcockpit.
2. If this transfer was successful, activate the EEPROM write procedure using the control word described under object "Read/
Write access EEPROM (2006h)". Note that the address given in object 2005h must be equal to the address in object 2006h,
otherwise the write operation will be rejected.
3. Read object 2006h to check for general errors until the EEPROM is not busy anymore.
4. When all data has been written, verify the EEPROM data using record read operation.
Read/ Write access EEPROM (2006h)
This object controls the access to the CANcockpit parameter memory (EEPROM).
OBJECT DESCRIPTION
Index 2006h
Name Read and Write access EEPROM
Object Code VAR
Data Type UNSIGNED32
Category Optional
ENTRY DESCRIPTION
Access Rw
PDO Mapping No
Value Range As defined below.
Default Value N/A
The UNSIGNED32 variable is defined as follows:
MSB LSB
Byte3 Byte2 Byte1 Byte0
See below for coding Check Byte High byte of address Low byte of address
Byte3 contains the command and status bits for the EEPROM read and write operation.
MSB = Byte3
Bit 7 6 5 4 3 2 1 0
Rdy Err Bsy 0 0 0 Rd Wr
Rdy:
This bit should always be set to 0, if the object is written to. CANcockpit will set it to 1, when the read has been finished
successfully. In case of a read operation, the requested data will then be available in the EEPROM Data Record object.
Err:
This bit should always be set to 0, if the object is written to. CANcockpit will set this bit in case the requested operation
produced an error. If Err will be 1, then Rdy will not become 1.
Bsy:
This bit must be checked and must be 0, before an EEPROM Data Record may be written to object 2005h and before an
EEPROM read or write command may be written to object 2006h. If this bit is 1, it indicates, that the EEPROM is busy and
cannot be accessed now. When an EEPROM write operation has been started, CANcockpit will set this bit to 1 and
automatically clear it after the EEPROM write has finished.
Rd = 1 -> Read EEPROM contents command starting at the address (Byte1 and Byte0) into EEPROM Data Record. The
Check Byte (Byte2) must be set to 0xAA, otherwise an error will be returned. If Rd=1, Wr must be 0.
Wr = 1 -> Write data in EEPROM Data Record (object 2005h) into EEPROM. The Check Byte (Byte2) must be set to 0x55,
otherwise an error will be returned and no write operation will be performed. If Wr=1, Rd must be 0.
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