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SLS 1508 HART analog input channel parameters

Table: SLS 1508 HART analog input channel parameters

Channel Parameter

Can Configure?

Description

COLD_START

No

HART status bit #5.

Indicates if the HART field device went thru a power cycle. The device clears it after the first response.

CONFIG_CHANGED

No

HART status bit #6.

Indicates if a configuration change has been made on the HART field device. On detection the scale and units are uploaded automatically and flag cleared.

DEV_CFG_MISMATCH

No

Indicates if the physically installed device does not match the configured device.

DEV_MALFUNC

No

Set and cleared by tracking Field Device Malfunction (HART status bit #7) from the HART instrument. If the HART instrument detects a malfunction within itself, this parameter is set to True (1).

DISPARITY_DETECT

Yes

Allows the user to enable and disable the detection of a loop current mismatch between the analog and digital current values from the HART device.

FIELD_VAL_PCT

No

The 4 to 20 mA signal of the HART transmitter, in percent of range. HART status is not applied.

HART_ERRORS

Yes

Allows the screening of status error messages generated by the transmitter.

HART_PV

No

The Primary Variable returned by the HART transmitter, in engineering units. This value is read digitally.

HART_SV

No

The Secondary Variable returned by the HART transmitter, in engineering units. This value is read digitally.

HART_TV

No

The Tertiary Variable returned by the HART transmitter, in engineering units. This value is read digitally.

HART_FV

No

The Fourth Variable returned by the HART transmitter, in engineering units. This value is read digitally.

HINTEG

No

For HART analog input and output channels, HINTEG indicates that a HART error is present (0=Good, 1=Bad) even if HART_ERRORS is configured to ignore the error. When HART_ERRORS is configured to ignore one or more HART errors, a corresponding active HART error does not contribute to Bad OINTEG on the channel; however, it does contribute to Bad HINTEG on the channel. HINTEG is always Bad when OINTEG is Bad.

MORE_STATUS

No

HART status bit #4.

Indicates if there are additional details that the devices can return. If this is set use AMS Device Manager or HART handheld device to get additional information.

NAMUR_ENA

Yes

Controls whether NAMUR alarming is performed on the channel. If enabled and if the transmitter supports it, an analog value that is outside the NAMUR limits (106.25% and -2.5%) for four seconds has its status marked as Bad: Sensor Failure.

NO_COMM

No

Set to True (1) if digital communication with the HART instrument has stopped or was never started. If digital communication is successful, this parameter is set to False (0) immediately.

NPV_PAST_LIM

No

Set and cleared by tracking the Non-Primary Variable Out of Limits (HART status bit #1) from a HART instrument. If one of the measured non-Primary Variables is outside its sensor operating limits (high or low), this parameter is set to True (1).

OVERRANGE_PCT

Yes

The percent value at which the analog value is considered overrange. If the signal is above this limit, the status of the function block's analog parameter associated with this channel is HighLimited.

PV_FIXED

No

Set and cleared by tracking the Process Variable Analog Output Fixed (HART status bit #3) from a HART instrument. If the HART device analog output value is fixed to a requested value, this parameter is set to True (1).

PV_PAST_LIM

No

Set and cleared by tracking the Primary Variable Out of Limits (HART status bit #0) from a HART instrument. If the measured Primary Variable is outside the sensor operating limits (high or low), this parameter is set to True (1).

PV_SAT

No

Set and cleared by tracking the Primary Variable Analog Output Saturated (HART status bit #2) from a HART instrument. If the analog output from the HART device is out of range (high or low), this parameter is set to True (1).

UNDERRANGE_PCT

Yes

The percent value at which the analog value is considered underrange. If the signal is below this limit, the status of the function block's analog parameter associated with this channel is LowLimited.