RAMP
Function block - Limit the ascendance or descendance of a signal.
Inputs
|
Input |
Data type |
Description |
|
IN |
REAL |
Input signal. |
|
ASC |
REAL |
Maximum ascendance during time base. |
|
DSC |
REAL |
Maximum descendance during time base. |
|
TM |
TIME |
Time base. |
|
RST |
BOOL |
Reset. |
Outputs
|
Output |
Data type |
Description |
|
OUT |
REAL |
Ramp signal. |
Time diagram
Remarks
Parameters are not updated constantly. They are taken into account when only:
- The first time the block is called.
- When the 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.
In LD 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.
ST Language
MyRamp is a declared instance of RAMP function block.
MyRamp (IN, ASC, DSC, TM, RST);
OUT := MyRamp.OUT;
FBD Language
LD Language
The function is executed only if EN is TRUE.
ENO keeps the same value as EN.
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