Hardware Manual PCD1.M2110R1 │ Document 27-619 │ Version ENG 04 │ 2018-08-20
Saia-Burgess Controls AG
Communications Interfaces
6
6-1
Using the Saia S-Bus
6
Communications Interfaces for PCD1.M2_
The words “port” will be used for the remainder of this manual instead
of “communications interface” for the purpose of simplification.
Using the SBC S-Bus
SBC S-Bus stands for the proprietary communications protocol of Saia PCD
®
The SBC S-Bus is basically designed for communications using the engineering
and debugging tools, as well as for connection to management levels/process
control systems. It is not suitable or approved for connecting the field devices of
other manufacturers. An open, vendor-neutral field bus is more appropriate for
this purpose.
For the PCD1.Room, the maximum number of S-Bus stations is fixed at 10. This
limit is due to the possible address range.
Number of supported S-bus address:
10
Selectable S-bus address space:
0 .. 251
In addition, addresses 252 and 253 are supported for commissioning and setting
the parameters of PCD7.L6xx modules.
The S-bus broadcast address 255 is also enabled.
Use of Modbus
The Modbus (Modbus RTU and/or Modbus ASCII and/or Modbus TCP slave) par-
ticipants are limited to a maximum number of total 10 participants.
Number of supported Modbus ad-
dress:
10
Selectable Modbus address space:
> 0
The broadcast address 0 is also enabled.
