I/O Blocks > Fieldbus Multiplexed Analog Input (FFMAI_RMT) function block

Fieldbus Multiplexed Analog Input function block parameters

The following table lists the parameters for the Multiplexed Analog Input function block.

Note

The blocks in some fieldbus devices may not have all parameters.

Table: Multiplexed Analog Input function block system parameters

Parameter

Units

Description

ABNORM_ACTIVE

None

The indication that a block error condition not selected in BAD_MASK (on the function block level) is True (active) or the indication that an error condition (at the module level) not selected in MERROR_MASK is True (Active) or a module status not selected in MSTATUS_MASK is True (Active).

ALERT_KEY

None

A user-assigned identification number reported in alarm messages from the block that allows HMI applications to sort and filter alarms and events. Set this parameter for each function block to indicate the physical unit the function block is associated with. This information can be used in the host for sorting alarms, and so on.

BAD_ACTIVE

None

The indication that a block error condition selected in BAD_MASK (at the function block level) is True (Active) or the indication that an error condition (at the module level) selected in MERROR_MASK is True (Active) or a module status selected in MSTATUS_MASK is True (Active).

BAD_MASK

None

The set of active error conditions that triggers a user-defined Bad condition. The user selects a subset of block error (BLOCK_ERR) conditions in the BAD_MASK parameter. When any of these conditions are True, the BAD_ACTIVE parameter becomes True. When any of the BLOCK_ERR conditions that are not included in BAD_MASK are True, ABNORM_ACTIVE becomes True.

BLOCK_ERR

None

The summary of active error conditions associated with the block. 

CHANNEL

None

Allows for custom channel setting. Valid values include:

  • 0 = Uninitialized

  • 1 = Channels 1 to 8 can only be set to their corresponding channel number

  • 2 = Custom settings. Channels can be configured for any valid channel defined in the device description.

CHANNEL_n

where n = 1 through 8

None

The number of the logical hardware channel that is connected to the I/O block. It defines the transducer to be used going to or from the physical world.

IO_OPTS

None

I/O options allow you to select how the I/O signals are processed. The only supported option is:

  • Low Cutoff.

L_TYPE

None

Linearization type. Determines whether the field value is used directly (Direct), is converted linearly (Indirect), or is converted with the square root (Indirect Square Root).

LOW_CUT

Percent

Activated when the Low Cutoff I/O option is enabled (True). When the converted measurement is below the LOW_CUT value, the PV is set to 0.0.

MODE

None

Parameter used to request and show the source of the output used by the block.

OUT_n

where n = 1 through 8

EU of OUT_SCALE

The primary value and status calculated by the block in Auto mode. OUT can be set manually in Man mode.

OUT_SCALE

None

The high and low scale values, engineering units code, and number of digits to the right of the decimal point associated with OUT.

PV_FTIME

Seconds

The time constant of the first-order PV filter. It is the time required for a 63% change in the FIELD_VAL to be reflected in the PV.

SIMULATE

None

Enables simulation and allows you to enter an input value and status. The SIMULATE value is used by the block only when SIMULATE is enabled.

ST_REV

None

The revision level of the static data associated with the function block. To support tracking changes in static parameter fields, the associated block's static revision parameter is incremented each time a static parameter field value is changed. Also, the associated block's static revision parameter is incremented if a static parameter field is written but the value is not changed.

STATUS_OPTS

None

Status options allow you to select options for status handling and processing. The supported status options are:

  • Uncertain if Man mode

  • BAD if Limited

  • Uncertain if Limited

  • Propagate Fault Forward

STRATEGY

None

Used to identify groupings of blocks. This data is not checked or processed by the block.

SUBSTITUTE_IN

Determined by source or EU of PV_SCALE

If there is a problem communicating with the field device and SUBSTITUTE_IN has a non-Bad status, the controller passes the SUBSTITUTE_IN value through to the output parameter(s) of the shadow block.

XD_SCALE

None

The high and low scale values, engineering units code, and number of digits to the right of the decimal point associated with the channel input value.