Access attributes define the access rights to objects as seen from the CanOpen network. Normally used by the SdoServer? to check if a client is allowed for doing a reqest:
rw
read and write access
rww
an accessory definition of CiA DSP 306 V 1.2: CANopen electronic data sheet (EDS) specification for CANopen,
read and write access to an object where writing affects directly a process output.
Objects with this attribute can be mapped in a devices RPDO.
rwr
an accessory definition of CiA DSP 306 V 1.2: CANopen electronic data sheet (EDS) specification for CANopen,
read and write access to an object where reading reads a process input.
Objects with this attribute can be mapped in a devices TPDO.
wo
write only access
ro
read only access
const
read only access, but the value is always the same, it's constant
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CanOpenAccessAttributes