Campbell Scientific CR6 CR6 Measurement and Control System - Page 408
PakBus Encryption
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Section 8. Operation [COM310 30] [COM410 30] [COMUSB, COMC1, COMC3, COMU1 COMU3, COMU5, COMU7, COMU9 COMU11, COMRF6] This setting specifies, for a given port, the explicit list of PakBus node addresses that the CR6 will accept as neighbors. If the list is empty (the default condition), any node is accepted as a neighbor. This setting will not effect the acceptance of a neighbor if that neighbor's address is greater than 3999. The formal syntax for this setting follows: neighbor := { "(" range-begin "," range-end ")" }. range-begin := pakbus-address. ; range-end := pakbus-address. pakbus-address := number. ; 0 < number < 4000 If more than 10 neighbors are in the allowed list and the beacon interval is 0, the beacon interval is changed to 60 seconds and beaconing is used for neighbor discovery instead of directed hello requests that consume communication memory. Not in Status table 8.5.10 PakBus Encryption Two PakBus devices can exchange encrypted commands and data. Encryption uses the AES-128 algorithm. Routers and other leaf nodes do not need to be set for encryption. The CR6 has a setting accessed through DevConfig (p. 116) that sets it to send and receive only encrypted commands and data. LoggerNet (p. 605), likewise, has a setting attached to the specific station that enables it to send and receive only encrypted commands and data. Header level information needed for routing is not encrypted. An encrypted CR6 can also communicate with an unencrypted datalogger. Use an EncryptExempt() instruction in the CRBasic program to define one or more PakBus addresses to which encrypted messages will not be sent. Campbell Scientific products supporting PakBus encryption include the following: • LoggerNet 4.2 • CR1000 datalogger (OS26 and later) • CR3000 datalogger (OS26 and later) • CR800 series dataloggers (OS26 and later) • CR6 series dataloggers (OS1 and later) Device Configuration Utility (DevConfig) v. 2.04 and later • Network Planner v. 1.6 and later. Portions of the protocol to which PakBus encryption is applied include: • All BMP5 messages • All settings related messages 408
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