Nematron Pointe Controller - Manual (Page 436)

Appendix C: Ladder Diagram Block Reference Pointe Controller User Guide
434
C.9.7 Character to Integer (CHR_TO)
When used in a Ladder Diagram, the CHR_TO block converts the first character of
a string into the equivalent ASCII decimal value.
Select the tool (from the Miscellaneous Blocks toolbar) and click on a ladder
rung to insert the following block:
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 first character of the
Input Value (IN) is converted into an equivalent ASCII decimal value and the
result is placed in the Output Value (OUT).
For example, the character ‘A’ is converted into the ASCII decimal value 65.
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 String
Literal
The input value. Literals must be
enclosed in single quotes (‘ ’).
OUT Output
Value req any integer* The result of converting the first
character of the input value into an
equivalent decimal value.
* Any Memory or Output tag except 32-bit Real (F) or Bit (X). For more information, see “ Defining
Input, Output, Memory tags ” on page 114 .