saia-pcd.com
205
1
SBC Software
3
SBC S-Web Technology
2
Communication &
interaction
Communication & interaction
The S-Bus protocol can be used on the USB and serial interfaces for communicating with Saia PCD® controllers. This makes it possible
to construct very simple, economical communication links and networks. Point-to-point (USB, RS-232) and 1:n communication
relationships are supported in the RS-485 network in master-slave operation.
S-Bus supports communication between
`
PCD controllers in master-slave (1:n) operation
`
a PCD controller and the PG5 programming device
`
a PCD controller and OPC server or SCADA system with S-Bus driver
`
a PCD controller (PCD-Web-Server) and web browser with Web-Connect software
Point-to-point communication relationship with S-Bus
S-Bus with
USB (Host only with PC),
RS-232, RS-422, RS-485
1 slave station
Properties, functions
`
Interfaces: USB, RS-232, RS-422, RS-485 (can be used simultaneously on several interfaces)
`
Baud rate: up to 12 MBit/s (USB standard 1.1)
`
Communication relationship: master-slave
`
Exchange of data with a SCADA system together with the SBC OPC server or an S-Bus driver
`
Supports communication via modem (PSTN, ISDN, GSM) to RS-232 interface
1:n master slave communication relationships in RS
-
485 network with S-Bus
1 master station
Properties, functions
`
Interfaces: RS-485 (can be used simultaneously on several interfaces)
`
Baud rate: up to 115 kBit/s
`
Bus cable: 2-wire, twisted and shielded (min. 2 × 0.5 mm2)
`
Bus length: max. 1200 m per section
`
Number of stations: max. 32 per section, total max. 255
`
Number of sections: max. 8, connected to one another via RS-485 repeater
`
Communication relationship: master-slave (only 1 master)
`
Programming the data transfer between PCD controllers with FBoxes for cyclic or event-controlled data transfer
`
Exchange of data with a SCADA system together with the SBC OPC server or an S-Bus driver
Note
The S-Bus protocol is also suitable for constructing multi-point wireless networks with external wireless modems. The wireless modems
are connected to the RS-232 interface. The control cables can be used to control the wireless modem transmitters. Further information
on this can be found in reference manual 26-739.
The proprietary SBC S-Bus is designed for communicating with the Saia PG5® engineering tool, connecting to the management layer/
process control systems and for communicating with the PCD. It is not suitable or approved for connecting field devices of other
manufacturers. An open, manufacturer-independent field bus (e. g. Profibus, Modbus, etc.) is the appropriate tool in this case.
PG5, SCADA,
OPC,
Web browser
1 master station
S-Bus with RS-485
n slave stations
PG5, SCADA,
OPC,
Web browser
2.5.3
Serial-S-Net: S-Bus on USB and serial interfaces, RS-232, RS-422/485
