| ??? 02/16/06 15:56 Read: times |
#110163 - The only REAL way to connect RS485 is de Responding to: ???'s previous message |
Jan says, it shouldn't daisy chain, what issue can arise.the appnote recommend it. Why Jan
Erik says, probably. I need the alternative if you please let me know The only REAL way to connect RS485 is described in the 10 ways.... note another issue is I want to attach the PC with master to let me know the status of each terminal.If i use the serial port for protocol, so how can i use it for Rs232 to PC, this is again my compulsion to use the AT89c51 /52.because i dont have Burner programmer for other derivative. Get a SILabs devkit ($99-up) that will give you all you need to develop and program dual UART chips. In adition it will give you ICE capability and without that I would not even dream of developing what you are talking about. "serial debuuging" will be impossible since you are going to occupy the serial ports and "no debugging except console" does not sound promising. Erik |
| Topic | Author | Date |
| +24 volt DC pulse counting with 8 signal | 01/01/70 00:00 | |
| you shouldn't daisy-chain RS485 | 01/01/70 00:00 | |
| WHY | 01/01/70 00:00 | |
| sorry, me stupid | 01/01/70 00:00 | |
| if you get the details right it certainl | 01/01/70 00:00 | |
| Daisy Chain | 01/01/70 00:00 | |
| The only REAL way to connect RS485 is de | 01/01/70 00:00 | |
| What you need is a PLC | 01/01/70 00:00 | |
| Erik and Jan is it feasible. | 01/01/70 00:00 | |
| already answered: | 01/01/70 00:00 | |
| for pulses counting | 01/01/70 00:00 | |
| Pulse input | 01/01/70 00:00 | |
| +24 pulse through optocoupler | 01/01/70 00:00 | |
| Schmidt and isolate | 01/01/70 00:00 | |
| 4N35 are being used | 01/01/70 00:00 | |
| I know of none such, but follow the opto | 01/01/70 00:00 | |
| 14 is not clear to me | 01/01/70 00:00 | |
| if the links worked I'd have a look | 01/01/70 00:00 | |
| links fixed | 01/01/70 00:00 | |
| 6 pin schmidt Trigger opto/ isolator | 01/01/70 00:00 | |
seems like good choices | 01/01/70 00:00 |