EasyManuals Logo

Allen-Bradley Logix5000 Reference Manual

Allen-Bradley Logix5000
708 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #525 background imageLoading...
Page #525 background image
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011 525
Special Instructions (FBC, DDT, DTR, PID) Chapter 13
Structured Text
IF (Local:0:I.Ch0Fault) THEN
TIC101.SWM [:=] 1;
ELSE
TIC101.SWM := 0;
END_IF;
IF (Local:0:I.RollingTimestamp<>PreviousTimestamp) OR
(Local:0:I.Ch0Fault) THEN
PreviousTimestamp := Local:0:I.RollingTimestamp;
PID(TIC101,Local:0:I.Ch0Data,Local:0:I.Ch1Data,
Local:1:O.Ch0Data,0,Local:1:I.Ch0InHold,
Local:1:I.Ch0Data);
END_IF;
Bumpless Restart
The PID instruction can interact with the 1756 analog output modules to
support a bumpless restart when the controller changes from Program
to Run mode or when the controller powers up.
When a 1756 analog output module loses communications with the controller
or senses that the controller is in Program mode, the analog output module sets
its outputs to the fault condition values you specified when you configured the
module. When the controller then returns to Run mode or re-establishes
communications with the analog output module, you can have the PID
instruction automatically reset its control variable output equal to the analog
output by using the Inhold bit and Inhold Value parameters on the
PID instruction.

Table of Contents

Other manuals for Allen-Bradley Logix5000

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Allen-Bradley Logix5000 and is the answer not in the manual?

Allen-Bradley Logix5000 Specifications

General IconGeneral
BrandAllen-Bradley
ModelLogix5000
CategoryController
LanguageEnglish

Related product manuals