| ??? 09/18/08 14:56 Read: times |
#158363 - MAX1483 problem |
Dear Fellow,
I have used max1483 for a Rs485 based network.The network consist of 168 Terminals, all the max have been mounted on card with At89c51 with collect data from one of it port and interrupt have been used in setup. I have ground and sheilded everythings as per specification of "Bulet proof RS485" documents. A computer is being used for master after using a Rs232 to Rs485 convertor card and It is suppose to Master of all network. Network has to be working for 24 hours, But some time when computer software trying to read terminal at any location, All the network get down.And after network failure, I have to reset the particular card at failed terminal manually.After reset mostly that card donot repeat the problem.(Means ...no hardware problem) I have used two LEDs to check which card made a problem. These LEDs just toggled each other twice during the sending and receiving. Why it is making all the network down,I suppose it should down only that particular card ?? Thanks |
| Topic | Author | Date |
| MAX1483 problem | 01/01/70 00:00 | |
| and terminated?? | 01/01/70 00:00 | |
| Comm Packet Receive Validation | 01/01/70 00:00 | |
| I agree with Michael | 01/01/70 00:00 | |
| Sorry Erick, Couldn't reply you earlier | 01/01/70 00:00 | |
| how did you do that with a PC as the master? | 01/01/70 00:00 | |
| 9 bit | 01/01/70 00:00 | |
after I posted | 01/01/70 00:00 | |
| half-duplex networking | 01/01/70 00:00 | |
| Watchdog function common | 01/01/70 00:00 | |
| Only one transmitter at a time. | 01/01/70 00:00 | |
| suggest from third countries... | 01/01/70 00:00 | |
| Something else to consider | 01/01/70 00:00 | |
| too late, but for others | 01/01/70 00:00 |