Computer Hardware - ABB XSeries G4 6200 User Manual

Flow computer

Table of Contents

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Transmitting Data: Sending a response.

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Receiving Data: Processing request.

Negative Acknowledgement (Nak) w/packet list.

Positive Acknowledge (Ack) of receipt of request.

Waiting for Positive Acknowledgement: Waiting for response after transmission.

Exception Alarm Processing.

ID Recognized: Recognized and receiving request.

Listen Cycle: Flashes if this remote port is active and running Totalflow Remote Protocol.

Flashes in sync with listening cycle that occurs at 1, 2 or 4 second intervals. May not be

visible if baud rate is faster than 2400. Annunciator will remain on if listen cycle is set to zero.

MODBUS ASCII: MODBUS ASCII protocol selected for the port assigned to this annunciator.

MODBUS RTU: MODBUS RTU protocol is selected for the port assigned to this annunciator.

Local Protocol: Displayed when PCCU32 port is active and running Totalflow Local Protocol.

Network (Ethernet).

USB.

Back Flow Condition: Visible only when DP variable displayed.

Zero Flow Condition: Visible only when Flow Rate displayed.

Hold: Displayed when PCCU32 has entered Calibration mode on a Measurement Application.

Alarm Condition: Need to view alarm. The user may need to compare application limits to

current values to determine where the alarm condition is present.

A to D Failure: Displayed if A to D Converter's differential pressure, absolute static pressure or

temperature readings exceed maximum counts or are less than minimum counts.

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