Honeywell EXCEL 5000 OPEN SYSTEM XFL521B Product Data page 28

DISTRIBUTED I/O
Behavior Context
1 Power-up of the node
2 Power-up of the node
3 Power-up / Reset of the node
4 Anytime
5 Anytime
6 First power-up, Applicationless
firmware state exported
6 First power-up, Unconfigured
firmware state exported
6 First power-up, Configured
firmware state exported
7 Anytime
EN0B-0090
Table 16. Service LED behavior descriptions.
Likely Explanation
Bad node hardware. For Distributed I/O modules, perform the tests shown in
the previous section.
Bad node hardware. For Distributed I/O modules, perform the tests shown in
the previous section.
The module is applicationless. May be caused by the Neuron chip firmware
when a mismatch occurs on application checksums. This behavior is normal if
the application was exported to come up applicationless.
Possible corrupt EEPROM. For a Neuron 3150 Chip-based node, use a newly
programmed PROM, or EEBLANK and follow bring-up procedure.
The module is unconfigured.
Connect the Distributed I/O module to the CPU. The CPU will configure the
Distributed I/O module.
The OFF duration is approximately 1 second. Service LED should then turn
ON and stay on indicating an applicationless state.
The OFF duration is 1-15 seconds depending on the application size and
system clock. Service LED should then begin flashing as in behavior 5,
indicating an unconfigured state.
Connect the Distributed I/O module to the CPU. The CPU will configure the
Distributed I/O module.
The OFF duration is indefinite (1-15 seconds to load internal EEPROM; stays
OFF indicating configured state.) The module is configured and running
normally.
The module is configured and running normally.
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