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Operation
7
Operation
7.1
Messages
A module error is displayed via the "Err" LED (see section entitled "Display elements"). It is
signalled to the head module and then entered in the
Error stack, with PSSu in system environment A
}
Diagnostic log, with PSSu in system environment B.
}
of the head module.
The module can detect the following errors:
Error
Start-up error
Configuration error
ST communication error
Bus termination error
Temperature error: too warm (
Temperature error: too hot (
(
) There are two levels of overtemperature.
1
Too warm:
}
If a module's temperature exceeds a theshold value, the module sends a warning to the
head module. If the temperature drops back below the threshold value, the module
sends an all-clear.
Too hot:
}
If a module's temperature exceeds a further theshold value, the module sends an error
message to the head module and switches off the relay outputs.
After the "too hot" message has been received, if the temperature drops back below the
}
"too warm" theshold value, the relay contacts will close if the head module has set the
status of the outputs to "1".
Further information on PSSu error messages is available in the online help for the PSSuni-
versal Assistant system software.
Operating Manual PSSu E S 2DOR 10(-T)
22047-EN-05
Explanation
Error as the PSSu system starts
up.
Incorrect module type configured.
Error in ST communication with
the head module.
There is no end bracket.
1
)
Ambient temperature too high:
Error stack entry
1
)
Ambient temperature too high:
Relay outputs are switched off
Remedy
Change faulty module.
The configured hardware registry
does not match the actual hard-
ware registry.
Change faulty module.
Install a terminating plate with in-
tegrated end angle.
Ensure there is sufficient ventila-
tion in the control cabinet or pre-
vent overload.
Ensure there is sufficient ventila-
tion in the control cabinet or pre-
vent overload.
25
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