Ramp

Increases or decreases a tag value by a specified value, or by another tag's value.
Syntax
[/V] <
tag_name
> <
value
|t
ag
>
where
[/V]
 performs a read immediately after the write to verify that the value was actually altered in the programmable controller or OPC server.
  • This parameter is useful if the network is in poor condition or susceptible to noise interference.
  • If the verification fails, the error message is sent to the Factory Diagnostics system.
<tag_name>
is a relative or absolute reference to the tag that will be increased or decreased in value.
<value
|
tag>
 is an amount to add to or subtract from the current value of the specified tag, as follows:
  • A numeric value with a sign indicating add (
    +
    ) or subtract (
    -
    ).
  • The value to add or subtract, as a percentage of the total min/max range, with a sign indicating add (
    +
    ) or subtract (
    -
    ). The formula is:
    • new = old +/- (percentage/100 * (max - min))
    • plus (+) or minus (-) a tag
If
Ramp
 calculates a value that is outside of a tag's min/max range, it will write the highest or lowest allowable value to programmable controller or OPC server.
Remarks
A tag must expose High EU (maximum) and Low EU (minimum) properties for a percentage to be used.
If you use the
Ramp
 command in a macro, you must use two percent signs (%%) instead of one. A single percent sign is used in a macro to indicate a parameter. For example, to create a macro that increased the value of Tag1 by 75%, you would write this
Ramp Tag1 + 75%%
.
This command is run locally on the HMI server,
FactoryTalk View SE
 Client, or
FactoryTalk View Studio
 that issued it.
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