42/24-10 EN Rev. 9 Chapter 10: Status Messages, Troubleshooting 10-1
Chapter 10 Status Messages, Troubleshooting
CAUTION!
The tasks described in this chapter require special training and under some
circumstances involve working with the gas analyzer open and powered up.
Therefore, they should only be performed by qualified and specially trained
personnel.
Process Status
Definitions Process status provides information on measurement values and the process
being monitored by the analyzer.
System status (see page 10-2) provides information on the gas analyzer itself.
Process Status The term “process status” includes
• Transgression of measurement range limits
• Transgression of measurement value limit values
Transgression of
Measurement Range
Limits
If a sample component value is > +130% or < –100% of the measurement range
span, the sample component value in the display flashes. A status message is
also generated which is not entered into the logbook.
The thresholds established cannot be changed.
Transgression of
Limit Values
If a sample component value is above or below a limit value, this status can be
communicated as a binary signal at one of the system controller or I/O board
digital outputs.
Two prerequisites must be met for this to happen:
• The limit value must be assigned to a digital output by means of function block
configuration (see “Standard Configuration” section, page 7-B-2).
• The limit value monitoring parameters (direction of effect, threshold value,
hysteresis) must be set (see “Limit Monitor Initialization” section, page 7-A-7).
The assignment of limit values to certain digital outputs is factory-set; this is
documented in the analyzer data sheet.
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