Siemens Sitrans HART Response Code Information, Bit #7 Field Device Malfunction, Appendix C

HART Response Code Information

Additional response code information, Second Byte.

Bit #7: Field Device Malfunction

When the transmitter detects a malfunction, the Analog Output will be set in a fault state.

Bit #6: Configuration Changed

When any of the settings in EEROM is changed either by a write command or by manual ZERO or SPAN adjust, this bit is set. Use command 38 to reset.

Bit #5: Cold Start

This bit is issued once after an initialisation cycle is complete; this can occur after a power loss or as a result of a (watchdog) reset.

Bit #4: Extended Status Available

When any of the extended status bits is set this flag is raised. Use command 48 to get detailed status information.

Bit #3: Output Current Fixed

This bit is set as long as the Primary Variable Analog Output is set to a fixed value.

Bit #2: Primary Variable Analog Output Saturated

Flag is set when the Primary Analog Output saturates below 3.8 mA and above 20.5 mA.

Bit #0: Primary Variable Out of Limits

This flag is set whenever the Transmitter Variable #0 (in pF), the Primary Variable exceeds the Sensor Limits returned with Command 14, Read Primary Variable Sensor Limits.

Appendix C

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 77