| ??? 05/30/07 12:28 Read: times |
#140052 - PLC can be dirt cheap Responding to: ???'s previous message |
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:)
Have a look at e.g. Keyence. When looking for a PLC do not be confused by the stuff named a PLC that is not one I can hardly count how much such stuff I have seen. The advantage of using a 'ready made' PLC from a known manufacturer is that you will know that it can withstand the industrial environment e.g. EMI. It may be that your application is better handled by a dedicated design, the above is NOT to say "do not do so" just to enlighten you on the possible advantages of using a PLC. Check one thing: are your customers familiar with programming ladder logic (most industrial plants will have one or more such person(s)), if so, you can save a bunch of headaches and money in maintenance by using a PLC. DO remember that for a product like what you propose much of the cost to you comes AFTER you have delivered. Erik |
| 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 |