25
6630-2212
Word 2
High: Input byte 1
Low: Input byte 2
Word 3
High: Input byte 3
Low: Input byte 4
.........
........
......
Word 65
High: Input byte 127
Low: Input byte 128.
7.2.2.3 PROFIBUS DP communication
Required PROFIBUS DP communication sequence, from a PROFIBUS DP master unit to
FD-10 A, to get access and data exchange with remote Fieldbus Adapters.
Preparing for data exchange:
1. Enable normal operation access with FD-10 by command EN
Out word 1, bit 15 set high (1).
2. Verify accepted EN command by checking status ST.
In word 1, bit 15 shall be high (1).
Data exchange with a remote Fieldbus Adapter:
1. Set the Transfer slave address.
Out word 1, low byte to current serial transfer address.
2. Set Out data (up to 64 words) to this Transfer slave.
Out word 2 ... 65.
3. Reset last received Input data and status by the command RES.
Out word 1, change state of toggle bit 11.
4. Transmit output data over serial transfer line by the command SDO.
Out word 1, change state of toggle bit 14.
5. Verify correct sent and received data by checking status ACK.
In word 1, bit 11 shall be high (1).
• Or, incorrect sent and received data, has not been received
within 1500 ms by checking status TO.
In word 1, bit 10 is set to high (1) in case of time out.
6. If correct received data will ACK be high (1) and TO low (0).
Read In data (up to 64 word) from addressed Fieldbus Adapter.
In word 2 ... 65.
AUDIN - 8, avenue de la malle - 51370 Saint Brice Courcelles - Tel : 03.26.04.20.21 - Fax : 03.26.04.28.20 - Web : http: www.audin.fr - Email : [email protected]
