Техническая Спецификация для Phoenix Contact 2701027 NLC-050-024D-06I-04QTP-00A nanoLine Base Unit 24ßV/DC / PNP 2701027

Модели

2701027

Flow Chart Techniques

2373_en_B

PHOENIX CONTACT

4-11

4.1.5

Decision Block

The Decision block evaluates a Boolean expression as true/false. The expression may

consist of one or more bits. The Decision block has one entry point and two exit points

(Yes/No), based on the Boolean decision. Use the “Decision Block” dialog box to select the

bit(s) to be evaluated, which are of these types:

–

Flag

–

Input

–

Output

–

Keypad key

–

Timer/Counter

–

High-Speed Counter

–

The AND and OR “Operator” in the dialog box permits adding a second Boolean

condition to the expression. Expressions are evaluated from top-down. nanoLC

supports one or two Boolean conditions in one Decision block. Double-click the

Decision block to edit its expression. This displays the “Decision Block... Configu-

Figure 4-6

“Decision Block... Configuration” tab

To perform a non-Boolean comparison, use the Compare block (see “Compare Block” on

Decision

Block Button