Instruction manual

SITRANS TW
108 A5E00054075-05
Functions / Operation by HART
4.2.15 Factory calibration
It is possible to reset the transmitter to its exfactorystate. You can select the scope
of the recoverable parameters in a menu with SIMATIC PDM or the HART
communicator in five steps:
1. Resetting the factory basic data except for the following parameters:
→ customer-specific sensor adjustment
→ customer-specific adjustment of the analog output
→ customer-specific alarm settings
→ customer-specific settings for the sensor error / limit value alarm
2. resetting the customer-specific sensor adjustment
3. resetting the customer-specific adjustment of the analog output
4. resetting the customer-specific alarm settings with the following parameters:
→ alarm type of the analog output
→ lower and upper alarm value of the analog output
→ lower and upper output limit of the analog output
5. resetting the customer-specific settings for the sensor error / limit value alarm
with the following parameters:
→ lower and upper limit value limit
→ Hysteresis
→ switching delay
→ limit value alarm mode
→ alarm activation
4.2.16 Diagnostic functions
Communication with a HART interface enables numerous diagnostic functions to be
activated and evaluated.
The diagnostic concept of the SITRANS TW is such that a diagnostic warning can be
parameterized for diagnostic functions for monitoring limit values and a diagnostic
alarm for diagnostic functions for monitoring error states. The diagnostic warning and
diagnostic alarm can be output by:
→ HART communication
→ Analog output
→ message relay
→ Operating display (LED)
• Diagnostic warning The device transmits the diagnostic event that has
occurred via HART. The analog output value remains unchanged. A warning via
the built-in message relay (sensor error / limit value alarm) can be parameter-
ized.