| ??? 05/30/07 12:48 Modified: 05/30/07 12:50 Read: times Msg Score: +1 +1 Good Answer/Helpful |
#140057 - PLCs Responding to: ???'s previous message |
PLCs are much simpler to program compared to writing in assembler etc. As Erik says, the small PLCs are cheap. I haven't tried the Keyence ones, but there is the LOGO from Siemens, Twido from Schneider and these are < $300USD. The Twidos can have two serial ports, where the LOGO has none(I think). They all come packaged and some with a built in power supply. All you need to do is get a polycarb enclosure, some din rail and some terminals. Some programming and some wiring - industrial strength solution.
Do some research. You'll have a working, robust solution using a PLC much faster than trying to cobble something up yourself. At the minumum, using a PLC you can show a working concept quickly to give everyone a warm, fuzzy feeling. |
| 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 |