SIS function blocks > SIS Math Blocks > Logic Solver Limit function block

Logic Solver Limit function block parameters

The following table lists the system parameters for the LSLIM function block:

Table: LSLIM Function Block System Parameters

Parameter

(Data Type)

Default Value

(Units)

Characteristics

Description

DEFAULT

(Floating point)

0

(Determined by source)

Access:

Configurable, Tuning

NVM:

Configurable, Restored on Restart

The value of OUT if LIMIT_OPT is Use Default Value and the value of IN is above OUT_HI_LIM or below OUT_LO_LIM.

IN

(Floating point with status)

0

(Determined by source)

Access:

Tuning

NVM:

Restored on Restart

The analog input value and status.

LIM_INDICATOR

(Discrete with status)

0

NVM:

Preserved on Download

Discrete output value set True (1) when IN is limited to OUT_HI_LIM. It remains True until IN becomes limited by OUT_LO_LIM.

LIMIT_OPT

(Named Set)

Clamp

Access:

Configurable, Tuning

NVM:

Restored on Restart

This option controls how data is treated. The choices are:

  • Clamp — OUT set at limit value when limit is exceeded

  • Use Last Value — OUT remains at previous value when limit is exceeded

  • Use Default Value — OUT value is set to DEFAULT when limit is exceeded.

OUT

(Floating point with status)

0

(Determined by IN)

NVM:

Preserved on Download

The analog output value and status.

OUT_HI_ACT

(Discrete with status)

0

NVM:

Preserved on Download

Boolean value set True when the input is high-limited to the maximum, last, or default value.

OUT_HI_LIM

(Floating point)

100

(Determined by IN)

Access:

Configurable, Tuning

NVM:

Restored on Restart

The maximum output value allowed.

OUT_LO_ACT

(Discrete with status)

0

NVM:

Preserved on Download

Boolean value set True when the input is low-limited to the minimum, last, or default value.

OUT_LO_LIM

(Floating point)

0

(Determined by IN)

Access:

Configurable, Tuning

NVM:

Restored on Restart

The minimum output value allowed.