Description of data exchange module
The data exchange module allows the exchange of 4 (5) bytes between different fieldbus systems via multiplexing of a serial connection. The delay which is caused by the multiplexor is < 5ms. The integrated watchdog function switches all outputs to zero if there is no valid information for more than 200 ms via the multiplex connection.
The 128 bytes input buffer provides for high rates of data transmission. When using lower rates of transmission speed you can collect the received data, with less priority, without loosing data.
The 16 byte output buffer provides for faster transmission of larger data strings.
The data exchange module is connected
TxD TxD
:+$*2-
TxD TxD
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RxD RxD
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RxD RxD
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| M | M |
| :M$*2M |
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| S | S |
| S | S |
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| Input byte0 |
| SHHUWRSHHUFRQQHFWLRQ 9 |
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| Internal | (1 |
| N |
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7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | control system |
| RxD + | ||
| Input byte1 |
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7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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| Input byte2 |
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7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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| Input byte3 |
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7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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| Input byte4 |
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7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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Output byte0
7 6 5 4 3 2 1 0
Output byte1
7 6 5 4 3 2 1 0
Output byte2
7 6 5 4 3 2 1 0
Output byte3
7 6 5 4 3 2 1 0
| Output byte4 |
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| Control byte |
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| Statusbyte |
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7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 7 | 6 |
| 5 | 4 | 3 | 2 |
| 1 | 0 |
Dataexchange module | 3 |
