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CBIC Function tree (incomplete), might have useful info for understanding this page:
https://wiki.classe.cornell.edu/ACC/Bunch/FunctionTree

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CBIC Start

Cycle through each instrument:

Verify connectivity

• if connection attempt failed,
• command power supply to ON
• reset DSP using xbus
• if fail too many times, then set active = CBI_INACTIVE

Set recovery = CBI_FALSE

Check CBI Communication Struct Version

• if instrument and CBIC don't match, then set active = CBI_INACTIVE

Check CBPM Communication Struct Version

• if instrument and CBIC don't match, then set active = CBI_INACTIVE

Check Timing Integrity

• if cbi_heartbeat.timing_integrity is false, then set active = CBI_INACTIVE

Check Heartbeat

• if cbi_heartbeat.heartbeat is bad, i.e. not changing, then set active = CBI_INACTIVE

Check Instrument status

• if instrument status == CBI_F_HANDSHAKE_TIMEOUT, CBI_F_COMM_ERROR, or CBI_F_HANDSHAKE_ERROR, then set instrument in_recovery = CBI_TRUE
• If in recovery, then call RESET AND INIT

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Executing Commands:

happens in cbi_cesr_interface inside loop

Call PrepFunction

Copy_touched_structs

• if fail to write to structure, then set active = CBI_INACTIVE

Call Cbi_Inst_Loop

• if in_recovery = CBI_TRUE, and status not CBI_SUCCESS then set active = CBI_INACTIVE

Check Instrument status

• if instrument status == CBI_F_HANDSHAKE_TIMEOUT, CBI_F_COMM_ERROR, or CBI_F_HANDSHAKE_ERROR, then set instrument in_recovery = CBI_TRUE
• If in recovery, then call RESET AND INIT

Repeat steps in cbi_cesr_interface

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-- MatthewStedinger - 08 Jan 2015