Rockwell Automation 57C610 Enhanced Basic Language, AutoMax - Manual (Page 110)

7Ć22
in_limit@ is true if 'new_value' is less than or equal to the
tunable variable's high limit and greater or equal to the tunable
variable's low limit. This parameter is optional.
This function provides the ability to change the current value of
tunable variables. This function will respect the tunable variable's
high and low limits. The compiler will disallow use of any other
statement, function, or control block to write to tunable variables.
The modified" flag for the task (in the onĆline task list) will be set
when the task executes this function. On the UDC module, the new
current value will be written to nonĆvolatile flash memory. The new
value will not be written to flash memory if it is the same as the old
value.
On the UDC module, if the tunable variable is a Power Module
Interface (PMI) gain, then all the PMI gains will be multiplexed with
the setpoint data to the PMI when the tunable value is changed. The
gains will not be sent if the new value of the tunable variable is the
same as the current value.
Note that frequent tunable updates via this function may slow
the response time of the Programming Executive and will count
towards the maximum limit on write operations to the UDC. See
the UDC module instruction manual, SĆ3007, for more
information.