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6/6/2017 3:01 PM | |
Posts: 2826 Rating: (685) |
Hello. The project is an addition to an existing system that uses the LOGO 12/24RCE (OBA8, FS:2). No hardware can be added. Any configuration / user interfacing should be done on the built-in screen. Several issues are coming to light. The first is the storage and retrieval of a value from 4 possible recipes (0 - 3). I am stuck with the storage portion of the program. Attached is an incomplete program. 1. The user can select the recipe he wants to load (0-3). Load triggered by I1. 2. The user is able to edit the loaded (binary) value. Only one bit is shown but 15 bits will be used in the final version. 3. The user should be able trigger I2 to save the edited values into memory. This should be available again in (1). It is with (3) that I am stuck with. Some ideas / hints would be welcomed. Regards. - Dan AttachmentStore and Retrival of recipe V1.pdf (151 Downloads) |
6/6/2017 7:11 PM | |
Posts: 2826 Rating: (685) |
Hello. I have found a key piece of helpful information from page: https://support.industry.siemens.com/tf/ww/de/posts/hinweise-zur-speicherung-von-analog-werten/17857/?page=0&pageSize=10 The PI instruction is used to save the calculated analog value through a power interruption. This is also helpful to me as a buffer between calculated and saved values. The newest version of the above application can be found: http://w3.siemens.com/mcms/programmable-logic-controller/en/logic-module-logo/application-examples/pages/default.aspx The application itself is here: http://www.automation.siemens.com/salesmaterial-as/software/applications/logo/refreshing_the_analog_output_every_5_seconds.zip Note that the application example for OBA8 is flawed. See the attached picture for the missing link. Thank you for your attention. - Dan |
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