Instruction Manual

Pointe Controller User Guide Appendix C: Ladder Diagram Block Reference
365
Once the block is inserted, you can double-click on it to configure it.
Functional Description
This block always passes the Enable input state (EN) through to the Enable Out
output state (ENO) without change; when EN becomes on, ENO is turned on, and
when EN becomes off, ENO is turned off.
When EN becomes on, the block function is executed: the square root of the
Input Value (IN) is calculated and the result is placed in the Output Value (OUT).
The block function is executed every time the ladder is scanned, so long as EN
remains on. If EN becomes off, then OUT remains at its last calculated value until
EN becomes on and the block function is executed again.
Configuration Reference
The parameters of this block are described in the following table:
Param Name Config Var Type Description
EN Enable no - The state of the rung (off/on)
received from the left.
ENO Enable
Out
no - The state of the rung (off/on)
passed to the right.
IN Input
Value
req real only*
Numeric
The input value. If a Numeric value
is manually entered, it must be real
/ floating.
OUT Output
Value
req real only* The result of calculating the square
root of the input value.
* Any 32-bit Real (F) Input, Output, or Memory tag. For more information, see “Defining Input,
Output, Memory tags” on page 114.
NOTE: This function cannot calculate the square root of a negative input value. If
the input value is negative, the value “1.#IND00” (indefinite) is placed in the
output. No error is generated.