Analog Row Edit: Output tab

Has Output

Select the checkbox to allow the configuration of output commands for analog points.

Output Type

Select the appropriate data format for the acquired analog data. The data format that is used is dependent on the device used to acquire data. Refer to the remote or protocol documentation for a definition of analog input data-type.

Some of the data-types currently supported include: float, unsign 16 int, signed 16 int, unsign 32 int, and signed 32 int. AVEVA can integrate other data-types into the system upon request.

Output Coordinates

Enter the coordinates where the data is mapped within the remote. This mapping depends on the protocol used.

Some protocols use registers to allocate data in remote memory, others use a definition of the point or file number for access. Representative data mappings and point configuration are described for various protocols in RealTime. Refer to your specific remote or protocol documentation for a definition of the data mappings and to determine the remote’s input/output data location in memory.

Convert raw to EGU

Select to convert the outputs from this point to EGUs.

An analog field device acquires its data as a raw instrument electrical value and transfers the value to its remote. At the remote, this value is changed into a digital value based on the communication protocol used. For example, in a certain protocol, the signal from a pressure controller that starts as an amperage between 4 and 20 mA is changed to a string of bits that represents a number between -4096 and +4095. Usually this raw number needs to be converted to EGUs (for example, barrels per hour). Sometimes the remote receives the value in EGUs, in which case no conversion is necessary. Refer to your remote’s documentation to see if this is the case for your remotes.

Minimum (raw)

Enter the instrument’s lower raw operating limit.

The EGU range represents the range of rate values expected for the point. This range should be set regardless of whether or not the rate is telemetry (an analog input), or calculated based on pulse counts over time (a pulse input).

Maximum (raw)

Enter the instrument’s upper raw operating limit.

The EGU range represents the range of rate values expected for the point. This range should be set regardless of whether or not the rate is telemetry (an analog input), or calculated based on pulse counts over time (a pulse input).

Minimum (EGU)

Enter the lowest measurable value of the instrument in EGUs.

For example, if a temperature instrument is rated as measuring between -40 °C and 160°C, set the Minimum (EGU) to -40 and set the Maximum (EGU) to 160. The EGU values are used in EGU conversion as well as in the Analog Control dialog box (refer to the AVEVA Enterprise SCADA HMI Controller documentation).

Maximum (EGU)

Enter the highest measurable value of the instrument in EGUs. For example, if a temperature instrument is rated as measuring between -40 °C and 160°C, set the Minimum (EGU) to -40 and set the Maximum (EGU) to 160. The EGU values are used in EGU conversion as well as in the Analog Control dialog box (refer to the AVEVA Enterprise SCADA HMI Controller documentation).

Setpoint Low

Limit

Enter the lowest setpoint that can be issued.

Setpoint High

Limit

Enter the highest setpoint that can be issued.

Ignore Command Feedback

Select to ignore any command feedback results. When selected, no command warning tags will be placed on the point and no command timeout alarms will generated after the command is successfully sent to the remote device. The settings for Command Timeout, Setpoint Tolerance, and Log Command Success will be ignored.

Command Timeout

Enter the amount of time (in seconds) that a value can be outside the setpoint tolerance limits before the system generates a command failure alarm.

If a point has been configured as having both inputs and outputs, this value should be greater than 0. If a point has been configured as having only output, this value should be 0.

Setpoint Tolerance

Enter the amount the setpoint command is allowed to fluctuate. A setpoint command will be considered successful when the analog input value reaches the setpoint value plus or minus the tolerance value.

Log Command Success

Select to record successful commands in the event log. Unsuccessful commands always generate alarms and are logged regardless of whether or not this checkbox is selected.

Setpoint Ramping

This section is used to enable the Setpoint Ramping application and configure the minimum amount of time that the ramping process must last.

For further information, refer to Setpoint Ramping.

Control Scan

This section is used to configure a feedback poll sent after the Controller issues a control or setpoint. The frequency and duration of the feedback poll is also configurable.

For further information, refer to your protocol-specific documentation.

Note: Not all protocols support this feature.