The TEST ADD SENSORS command
The TEST ADD RELAYS command
This function can be used to check correct communication is in place when commissioning or
testing addressable gas detectors.
Similar to the TEST ADD SENSORS this function can be used to check correct communication is in
place when commissioning or testing addressable relay output nodes.
CHANNEL 1 OF 7
1 Add=4201 C1
ERRORS = 0.0%
Tx=1059 E = 0.0%
The top line of the display indicates the
current channel under test. The system
will step through each detector in turn.
In this mode of operation the detectors
are run 10 times faster than normal to
exercise the communication circuits
The bottom line of the display shows
the percentage of errors detected. Errors
can be of two types. If a data packet is corrupt
it will be discarded. If a detector takes too
long to reply to a request for data then this
will also be an error. Ideally for a newly
installed system all channels will show zero
errors. Greater than 0.5% errors indicates an
‘electrically noisy’ industrial environment or
potentially faulty detector or cable terminations.
Up to 0.5% errors can be tolerated.
Normally errors can be traced to poor
electrical terminations.
This test is a communications test
only and does not power the actual
relay outputs. To test the relays use
the TEST ADD RELAYS2 function.
NOTE
The top line of the display indicates the
current relay under test. The system
will step through each detector in turn.
In this mode of operation the detectors
are run 10 times faster than normal to
exercise the communication circuits
The bottom line of the display shows
the percentage of errors detected. Errors
can be of two types. If a data packet is corrupt
it will be discarded. If a detector takes too
long to reply to a request for data then this
will also be an error. Ideally for a newly
installed system all channels will show zero
errors. Greater than 0.5% errors indicates an
‘electrically noisy’ industrial environment or
potentially faulty detector or cable terminations.
Up to 0.5% errors can be tolerated.
Normally errors can be traced to poor
electrical terminations.
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