Rockwell-automation Logix5000 Controllers Add-on Instructions Programm Manuel d'utilisateur télécharger pdf (Page 34)

Chapter 1 Designing Add-On Instructions

Tip: When you are using your Add-On Instructions, the Visible setting may be overridden in Function Block

Diagram routines if the parameter is not required or already wired. Overriding the visibility at the

instruction call does not affect this definition configuration.

Using standard and safety tags

When creating a safety Add-On Instruction, follow these guidelines for standard

and safety tags:

• Standard tags may not be used as Input, Output, or InOut parameters of a

safety Add-On Instruction.

• Safety tags may be used as Input parameters for standard Add-On

Instructions.

Data access control

In RSLogix 5000 software, version 18 and later, you can prevent programmatic

modification of InOut parameters by designating them as constants. You can also

configure the type of access to allow external devices, such as an HMI, to have to

your tag and parameter data. You can control access to tag data changes with Logix

Designer application by configuring FactoryTalk security.

34 Rockwell Automation Publication 1756-PM010F-EN-P - October 2014

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 103 104

Pas de commentaire

Rockwell-automation Logix5000 Controllers Add-on Instructions Programm Manuel d'utilisateur Page 34