Nematron Pointe Controller - Manual (Page 381)

Pointe Controller User Guide Appendix C: Ladder Diagram Block Reference
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NOTE: This function does not check for bit register overflow. If overflow occurs,
the value “1.#INF00” (infinite) is placed in the output.
C.3.18 Expression (EXPR)
As it is currently implemented, the EXPR block simply assigns the value of the
input to the output. In future releases this function will allow expressions to be
defined and executed as part of the diagram.
Select the tool (from the Math 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 Input Value (IN) is
directly assigned (copied) to 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.