Diagnostics - ABB Uvisor SF910i User Manual

17 Diagnostics

17 Diagnostics
SF910i runs internal self-checking diagnostic routines for every 0.125 seconds. The list
of error codes and related descriptions are shown in the tables of this section.
The error information is shown on the LCD display. When non-fatal, it is reported through
the serial communication channels (MODBUS).
When using MODBUS, the errors can be seen in the relevant Flame Explorer Software
screen (refer to SF910i Flame Explorer User Manual (8VZZ005308)).
Due to safety reasons, only a small set of errors leaves the SF910i in operation. Most
errors bring the SF910i to a HALT mode in safe condition (no more program execution,
all outputs into a safe state, both relays de-energized).
For the dual-sensor version, if a "Sensor-Fault" occurs, then the associated Flame-relay
is de-energized, and the associated LED becomes solid red.
Safety mode for outputs. When a fault is detected, the SF910i, before stopping
execution, brings the values of outputs to the safety values listed below in the table.
Table 17.1: Safety Outputs
Output Source
Safe-relay
Flame-relay
Analog output
Safe LED
Flame LED
Power LED
Display
Comm lines
(1). In this way, the transmitter is disabled, and communication between master and the other SF910i on a
multi-drop line will not be affected.
8VZZ005286 B
OFF (de-energized)
OFF (de-energized)
3.5 mA
Red
Red
Green
Error code (see tables)
(1)
Disabled
Safety Value
109