1756-RM001B-EN-P, Using ControlLogix in SIL2 ... - Tuv-fs.com

Technical SIL2 Requirements for the Application Program 9-7Table 9.1 Methods of Changing Your Application Program in RSLogix 5000• Users can edit the relay ladder logic portion of their programusing one of the following methods described in Table 9.1:Method: Required Steps: ControllerKeyswitchPosition:OfflineOnlineThe user performs the tasks described in the flow chart in Figure 9.1 onpage 9-5.1. Turn the controller key to the REM position.2. Use the Online Edit Toolbar to start, accept, test and assemble youredits. The toolbar is shown below.startpendingrung editacceptpending rungeditsassembleprogrameditstestprogrameditsuntestprogrameditsPROGREMKey Points to this Method:Users must revalidate the entireapplication before returning tonormal operation.The project remains online butoperates in the remote run mode.When edits are completed, usersare only required to validate thechanged portion of the applicationprogram.We recommend that online edits belimited to minor programmodifications such as setpointchanges or ladder logic rungadditions, deletions andmodifications.a. Click the start pending rung edits button . A copy is madeof the rung you want to edit.b. Change your application program as needed. At this point, theoriginal program is still active in the controller. Your programchanges are made in the copied rungs. Changes do not affect theoutputs until you test program edits in step d.c. Click the accept pending rung edits button . Yourprogram changes are verified and downloaded to the controller.The controller now has the changed program and the originalprogram. However, the controller continues to execute theoriginal program. You can see the state of the inputs, andchanges do not affect the outputs.d. Click the test program edits button .e. Click Yes to test the edits. Changes are now executed and affectthe outputs; the original program is no longer executed. However,if you are not satisfied with the result of testing the edits, youcan discard the new program by clicking on the untest programedits button if necessary. If you untest the edits, thecontroller returns to the original program.IMPORTANT: This option tochange theapplication programis available forchanges to relayladder logic only.Users cannot usethis method tochange functionblock programming.For more detailedinformation on howto edit ladder logicwhile online, seethe Logix5000Controllers QuickStart, publication1756-QS001.f. Click the assemble program edits button .g. Click Yes to assemble the edits. The changes are the onlyprogram in the controller, and the original program is discarded.3. Perform a partial proof test of the portion of the application affectedby the program edits.4. Turn the controller key back to the RUN position to return the projectto Run mode. We recommend you upload the new program to yourprogramming terminal to ensure consistency between theapplication in the controller and on the programming terminal.5. Remove the key.Publication 1756-RM001B-EN-P - October 2003