IFM Electronic Ecomot100 CANcom III Handbuch Seite 58

CAN CR310
COM X
Data security
SMS messages are transmitted over a secure connection (according to the GSM
standard). Received data is only stored in the library CANCOM if a security proto-
col was used.
In case of the direct modem connection the 2 modems set the same transmission
protocol. To do so 2 securing mechanisms against faulty, invalid or corrupted data
is implemented, i.e. monitoring via the GSM radio link protocol (GSM standard)
as well as creating an additional checksum within the firmware. Invalid or corrup-
ted data is rejected.
In case of invalid or corrupted data no automatic repetition takes place.
This has to be carried out by the user.
To see if CAN objects were lost or rejected one byte should be used as
"message counter", for example.
Data storage
From the operating systems version "H" the function blocks FLASHREAD and
FLASHWRITE are available for non volatile storing of max. 16 K data.
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