User guide

BB2-7040 User Guide – Rev. 1.2 Page 47
13 Trouble Shooting
13.1 Error Codes, Reliability Codes
Error codes returned by a Modbus device are encoded into reliability codes presented by the respective object. Reliability
codes (read via the Reliability property) are as follows:
BACnet device timeout (82)
BACnet error returned by server/slave BACnet device (83)
ZigBee device timeout (84)
ZigBee device error (85)
ZigBee reported invalid command (86)
ZigBee reported invalid parameter (87)
Other (99)
13.2 Auto-Reset Errors
Reliability codes will “latch” by default and require that you read the Reliability property in order to reset it to zero,
assuming the problem has gone away. Once the non-zero reliability code has been read (by reading the Reliability
property), it will reset to zero the next time the object is updated, provided the problem has been resolved.
Since many systems do not automatically read Reliability codes, but do automatically respond to the Fault Status Flag
associated with the non-zero reliability code, an auto-reset option is available. When set, reliability codes will return to
zero as soon as the problem has been resolved, regardless of whether the non-zero reliability code was ever
acknowledged by reading it.