| ??? 05/30/07 09:31 Read: times |
#140038 - Run signals frequency... Responding to: ???'s previous message |
Russell! I observed the machine. As we have 12 singles,I observed machine and find that any one run single may rise twice in a minutes. or in worst case it may rise trice in minutes. and maximum frequecy of Run signal can be 40 time in an hours (in worst case) I am using schmitt for all the run singles,so it may help to resolve issue of noise a bit better. while serial interrupt may rise 20 time in a minutes (after 5 seconds). I am concerned and worried about this,How to calculate everything accurately.As Micheal Karas wrote program, which detect the changes in singles and count them in 16 bit counter array.Basically I am trying bring a solution where I am sure that no pulse should gone without being noticed. PLC, I never worked in PLC. and there is as many as 30 Machines for which i have to make solution. All 30 machines located at different sites, it mean 30PLC. hmmm:) |
| Topic | Author | Date |
| 12 parallel pulses counting | 01/01/70 00:00 | |
| How fast are these pulses? | 01/01/70 00:00 | |
| pulses speed | 01/01/70 00:00 | |
| More info | 01/01/70 00:00 | |
| Pulse rate | 01/01/70 00:00 | |
| Isn't it slightly more complicated? | 01/01/70 00:00 | |
| Stretching pulses | 01/01/70 00:00 | |
| Another Quick Way | 01/01/70 00:00 | |
| Sampling timer with a buffer | 01/01/70 00:00 | |
| Showing Vertical Couners | 01/01/70 00:00 | |
| Yes other interrupt are also there | 01/01/70 00:00 | |
| Avoid using interrupts where possible | 01/01/70 00:00 | |
| Run signals frequency... | 01/01/70 00:00 | |
| PLC can be dirt cheap | 01/01/70 00:00 | |
| PLCs | 01/01/70 00:00 | |
an xcellent idea | 01/01/70 00:00 | |
| Sample with 2 74LS165 parallel loadShiftRegisiters | 01/01/70 00:00 | |
| would not the output pins drop... | 01/01/70 00:00 | |
| No Extra Hardware Needed | 01/01/70 00:00 | |
| No Extra Hardware Needed - I do not agree | 01/01/70 00:00 |