RAMP

 Function A function calculates a result according to the current value of its inputs. A function has no internal data and is not linked to declared instances. - Limit the ascendance or descendance of a signal.

Inputs

Input	Data Type	Range	Unit	Default	Description
IN	REAL				Input signal.
ASC	REAL				Maximum ascendance during time base.
DSC	REAL				Maximum descendant during time base.
TM	TIME				Time base.
RST	BOOL				Reset.

Outputs

Output	Data Type	Range	Unit	Description
OUT	REAL			Ramp signal.

Remarks

• Parameters are not updated constantly.
  • They are taken into account only when the:
    • The block is called the first time.
    • Reset input (RST) is TRUE.
  • In these two situations, the output is set to the value of IN input.
• ASC and DSC give the maximum ascendant and descendant growth during the TB time base.
  • Both must be expressed as positive numbers.

Time Diagram

FBD Language Example

FFLD Language Example

• In the FFLD "Free Form Ladder Diagram" Language, the operation is executed only if the input rung (EN) is TRUE.
  • The output rung (ENO) keeps the same value as the input rung.
• The function is executed only if EN is TRUE.
• ENO keeps the same value as EN.

IL Language Example

(* MyRamp is a declared instance of RAMP function block *)
Op1: CAL
MyRamp (IN, ASC, DSC, TM, RST)
FFLD  MyBlinker.OUT
ST "Structured text"
A high-level language that is block structured and syntactically resembles Pascal  OUT

ST Language Example

(* MyRamp is a declared instance of RAMP function block *)
MyRamp (IN, ASC, DSC, TM, RST);
OUT := MyBlinker.OUT;