Rockwell-automation Logix5000 Controllers Messages Programming Manual Manuel d'utilisateur télécharger pdf (Page 20)

Chapter 2 Manage multiple messages

Restart the sequence

If the MSGs in group 2 (last group) are currently enabled (Msg_Group.2 = 1)

and Msg_4 is in the state of done or error

and Msg_5 is in the state of done or error

then restart the sequence of MSGs with the first group:

Msg_Group.2 = 0. This disables the last group of MSGs.

Msg_Group.0 = 1. This enables the first group of MSGs.

Send the first group of MSGs

If Msg_Group.0 changes from 0 -> 1 then

send Msg_0.

send Msg_1.

Because a MSG instruction is a transitional instruction, it executes only when its rung-condition-in changes

from false to true.

Enable the second group of MSGs

If the MSGs in group 0 are currently enabled (Msg_Group.0 = 1)

and Msg_0 is in the state of done or error

and Msg_1 is in the state of done or error

then:

Msg_Group.0 = 0. This disables the current group of MSGs.

Msg_Group.1 = 1. This enables the next group of MSGs.

20 Rockwell Automation Publication 1756-PM012F-EN-P - October 2014

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Rockwell-automation Logix5000 Controllers Messages Programming Manual Manuel d'utilisateur Page 20