S5-FDL Communication
FDL-AGAG communication is possible with S5 controllers or with other PROFIBUS FDL devices. The following specifications apply here to the PROFIBUS SAPs:
FC310x sends
SDA request with DSAP = station address + 1 of the FC310x and SSAP = station address + 1 of the other FDL device. Data corresponds to the data length passed with the ADS write. The SDA telegram is only sent when there is a call to ADS write:
ADS-Write parameters | Meaning |
|---|---|
Net-ID | Net-ID of the master (see the device's ADS tab) |
Port | 0x1000 + station address of the other FDL device |
IndexGroup | 0x01000000 |
IndexOffset | 0 |
Length | Length of the data that is to be written |
Data | In request: data that is to be written |
Other FDL device sends:
SDA request with DSAP = station address + 1 of the other FDL device and SSAP = station address + 1 of the FC310X. Data corresponds to the data length set at the other FDL device. The FC310x temporarily stores the received data which can be read by ADS read:
ADS-Read parameters | Meaning |
|---|---|
Net-ID | Net-ID of the master (see the device's ADS tab) |
Port | 0x1000 + station address of the other FDL device |
IndexGroup | 0x01000000 |
IndexOffset | 0 |
Length | Length of the received data |
Data | In response: received data. There is a receive counter at the end of the received data that is incremented with every reception. |
ADS-Read parameters | Meaning |
|---|---|
Net-ID | Net-ID of the master (see the device's ADS tab) |
Port | 0x1000 + station address of the other FDL device |
IndexGroup | 0x04000000 |
IndexOffset | Station address of the other FDL device * 2 |
Length | 2 |
Data | In response: receive counter, incremented with each reception |