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