Functions
9.17 Diagnostics
SITRANS TH200/TH300
60
Operating Instructions, 06/2010, A5E00393069-03
9.17
Diagnostics
9.17.1
Diagnostic functions
The diagnostic concept of the SITRANS TH200 and the SITRANS TH300 envisages that a
diagnostic warning can be set in the parameters for diagnostic functions that are used for
monitoring limit values. A diagnostic interrupt can be set in the parameters for diagnostic
functions that are used for monitoring error conditions.
Diagnostics interrupts
Diagnostics interrupts can be output via:
● Analog output
● Operating indicator (LED)
● Only in SITRANS TH300: HART communication
The device goes into the alarm current state. In addition, the diagnostic event is made
available via the operating software. The following table summarizes all the diagnostic
functions that can be set in the parameters. If multiple errors occur simultaneously, the
priority settings apply. Priority 1 is the highest priority.
Diagnostic function
Priority
HART
1)
Analog output
LED
Hardware/firmware defect
RAM/ROM error
1
Status
On alarm value
Red
Flash/EEPROM error
1
Status
On alarm value
Red
Watchdog error
1
Status
On alarm value
Red
Electronics defect (hardware/firmware)
1
Status
On alarm value
Red
Electronics temperature outside limit
2)
1
Status
On alarm value
Red
Undershoot of min. supply voltage
1
-
< 3.6 mA
Red
Sensor error
Sensor breakage
2
Status
On alarm value Red 2
Hz
Sensor short circuit
2
Status
On alarm value Red 2
Hz
Measured value (PV) outside the sensor
limit
3)
2
Status
On alarm value Red 2
Hz
1)
Only in TH300
2)
A diagnostics interrupt is not triggered unless the measured value is higher or lower than
the limit value by 3 °C (5.40 °F).
3)
A diagnostics warning is triggered immediately when the measured value exceeds the
limit value. The diagnostic interrupt is triggered in any case if the limit value is exceeded
by more than 2%.
Summary of Contents for SITRANS T4200
Page 7: ...Table of contents SITRANS TH200 TH300 6 Operating Instructions 06 2010 A5E00393069 03 ...
Page 71: ...Service and maintenance SITRANS TH200 TH300 70 Operating Instructions 06 2010 A5E00393069 03 ...
Page 97: ...Glossary SITRANS TH200 TH300 96 Operating Instructions 06 2010 A5E00393069 03 ...
