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Showing results for tags 'fbd'.
Found 3 results
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Hello everyone, I’m working on programming an elevator (zeliosoft )where it is crucial that the doors are closed before the elevator moves. I have already created part of the system, but it’s not working perfectly. The elevator has 4 floors. Everything seems to work except for the safety feature: when a floor is selected and the door closes, it should indicate that the door is actually closed. However, it only works when I force it. Could someone take a look at why it’s not functioning correctly and explain what I might be doing wrong or how I can improve it? My program is in the .rar file. Thank you! Lift routingV1.rar -
Hi, very new to PLC programming and desperately looking for some help to finish my project! I need to program a pump to run based on the level in a holding tank. The start/stop set points change throughout the day based on the time. For example, function for the start set point is 1.15372×10^-6 x^6 - 0.000114068 x^5 + 0.00448866 x^4 - 0.0883477 x^3 + 0.877893 x^2 - 3.57417 x + 7.5, where x is in hours. How can I access the PLC time (current hour and minute) so I can use them to calculate the set points? Does Unity Pro XL have pre-defined variables for these?
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I'm trying to use a tag as an array index in FBD in Studio 5000, this works without issue in ST and LDD, but seems to not be allowed in function block. This seems incredibly short sighted to me which leads me to believe I must be doing something wrong. Is this possible? and if not is there a better way to accomplish what I'm trying to do? Attached are two screenshots, one of my problem with the exact error and one with a (hopefully) temporary workaround that I'm using currently. Thanks.
