Instruction manual

Introduction

890USE18300 September 2003 37

The Logical

Outputs

The output from each block also needs to be assigned a logical output. The logical

output is a tag name for the output—a text string between one and eight characters

long. The characters may be any combination of standard keyboard characters—

alpha numerics, underscores, and/or standard symbols (!,?, /, >, etc.).

The logical output can be particularly useful in a nested reflex because the text string

of the first action block will appear in the pull-down menu as an input to the second

action block.

A Counter-

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Configuration

To clarify the process of configuring a nested action, let’s look at the way you might

configure the first of the two action blocks in the reflex editor of the Advantys

configuration software:

Action no. 1 is a falling-edge counter, as items 1 and 2 above indicate. The action

module is the STB DDO 3230 digital output module at island bus address 2 (item 3

above). The action module needs to be a digital output module because the ultimate

result of the nested action will be Boolean.

Item 4 above shows the physical output channel on the action module as None. The

output from the falling-edge counter is sent to a temporary memory buffer. The

output value is then used as an operational input to the second block in the nested

action.