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Rockwell Automation Publication 1756-RM001I-EN-P - May 2012
Chapter 7
Requirements for Application Development
Table 3 - Methods of Changing Your Application Program in RSLogix 5000 Software
Method
Required Steps
Controller
Keyswitch
Position
Key Points to this Method
Offline
Perform the tasks described in the flow chart in
.
PROG
You must re-validate the entire application
before returning to normal operation.
Online
1. Turn the controller key to the REM position.
2. Use the Online Edit Toolbar to start, accept, test and assemble your edits. The toolbar is shown
below.
a. Click the start pending rung edits button
. A copy is made of the rung you want to edit.
b. Change your application program as needed. At this point, the original program is still active in
the controller. Your program changes are made in the copied rungs. Changes do not affect the
outputs until you test program edits in
step d
.
c. Click the accept pending rung edits button
. Your program changes are verified and
downloaded to the controller. The controller now has the changed program and the original
program. However, the controller continues to execute the original program. You can see the
state of the inputs, and changes do not affect the outputs.
d. Click the test program edits button
.
e. Click Yes to test the edits.
Changes are now executed and affect the outputs; the original program is no longer
executed. However, if you are not satisfied with the result of testing the edits,
you can discard the new program by clicking on the untest program edits button
if necessary. If you untest the edits, the controller returns to the original program.
f. Click the assemble program edits button
.
g. Click Yes to assemble the edits. The changes are the only program in the controller, and the
original program is discarded.
3. Perform a partial proof test of the portion of the application affected by the program edits.
4. Turn the controller key back to the RUN position to return the project to Run mode. We
recommend you upload the new program to your programming terminal to ensure consistency
between the application in the controller and on the programming terminal.
5. Remove the key.
REM
The project remains online but operates in the
remote Run mode. When edits are completed,
you are required to validate only the changed
portion of the application program.
We recommend that online edits be limited to
minor program modifications such as setpoint
changes or ladder logic rung additions,
deletions and modifications.
IMPORTANT
:This option to change the
application program is available for changes to
relay ladder logic only. You cannot use this
method to change function block
programming.
For more detailed information on how to edit
ladder logic while online, see the Logix5000
Controllers Quick Start, publication
.
Start
pending
rung edit.
Accept
pending rung
edits.
Test program
edits.
Assemble
program
edits.
Untest
program
edits.
IMPORTANT
If any changes are needed to the program in the safety loop, they must be
done so in accordance with IEC 61511-1, paragraph 11.7.1.5 which states:
‘The Safety Instrumentation System (SIS) operator interface design shall be
such as to prevent changes to SIS application software. Where safety
information needs to be transmitted from the basic process control system
(BPCS) to the SIS then systems should be used which can selectively allow
writing from the BPCS to specific SIS variables. Equipment or procedures
should be applied to confirm the proper selection has been transmitted and
received by the SIS and does not compromise the safety function of the SIS.’
Содержание 1756-L6 Series
Страница 24: ...24 Rockwell Automation Publication 1756 RM001I EN P May 2012 Chapter 1 SIL Policy Notes ...
Страница 60: ...60 Rockwell Automation Publication 1756 RM001I EN P May 2012 Chapter 5 ControlLogix I O Modules Notes ...
Страница 76: ...76 Rockwell Automation Publication 1756 RM001I EN P May 2012 Chapter 6 FLEX I O Modules Notes ...
Страница 120: ...120 Rockwell Automation Publication 1756 RM001I EN P May 2012 Appendix C PFD Calculations for a SIL 2 System Notes ...
Страница 126: ...126 Rockwell Automation Publication 1756 RM001I EN P May 2012 Appendix D Checklists Notes ...
Страница 133: ...Allen Bradley Motors ...