Emerson Process Management 8732 Transducer Block Diagnostics, Alarm Detection Status Handling

Reference Manual

00809-0100-4663, Rev BA January 2010

Rosemount 8732

TRANSDUCER BLOCK DIAGNOSTICS

In addition to the BLOCK_ERR and XD_ERROR parameters, more detailed information on the measurement status can be obtained via DETAILED_STATUS. Table G-5lists the potential errors and the possible corrective actions for the given values. Reset the transmitter by cycling power and then, if the error persists, perform the corrective action as described in Table G-5.More detailed and descriptive corrective actions are listed in Section 4: Operation and Section 6: Maintenance and Troubleshooting.

Table G-5.

TB_DETAILED_STATUS

Descriptions and Corrective

Actions

Value	Name and Description	Corrective Action
0x00000001	DSP hardware not compatible	Send to service center(1)
	with software
0x00000002	Electronics failure	Replace the electronics board
		stack
0x00000004	Coil drive open circuit	Perform sensor electrical
		resistance checks
0x00000008	Empty Pipe Detected	Verify sensor is full
0x00000010	Calibration failure	Cycle transmitter power to clear
		message
0x00000020	Auto Zero failure	Repeat Auto Zero process
0x00000040	Sensor high limit exceeded	Lower the process flowrate
0x00000080	Sensor processor not	Replace electronics
	communicating
0x00000100	Universal Trim failure	Re-run Universal Trim with steady
		state flow
0x00000200	Reverse flow detected	Verify sensor is not installed
		backwards
0x00000400	Electronics Temp outside limits	Status message –
		no corrective action
0x00002000	High Process Noise	Increase the coil drive frequency to
		37.5 Hz
0x00008000	Grounding/Wiring Fault	Connect process grounding

(1)See Section 6: Maintenance and Troubleshooting for detailed instructions on how to return products to an authorized service center or factory.

MODES

Alarm Detection

Status Handling

The transducer block supports two modes of operation as defined by the MODE_BLK parameter:

•Automatic (Auto)—The channel outputs reflect the analog input measurement.

•Out of Service (O/S)—The block is not processed. Channel outputs are not updated and the status is set to BAD: OUT OF SERVICE for each channel. The BLOCK_ERR parameter shows OUT OF SERVICE. In this mode, you can make changes to all configurable parameters. The target mode of a block may be restricted to one or more of the supported modes.

Alarms are not generated by the transducer block. By correctly handling the status of the channel values, the down stream block (AI) will generate the necessary alarms for the measurement. The error that generated this alarm can be determined by looking at BLOCK_ERR and XD_ERROR.

Normally, the status of the output channels reflects the status of the measurement value, the operating condition of the measurement electronics card, and any active alarm condition.

G-5