SBC PCD2.M5 Series - Serial Interfaces on I;O Module Slots 0 - 3; General Remarks on the Pcd2.F2 Xxx; Communication Ports on the PCD2.M5

Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG Communication interfaces
5
5-16
Serial interfaces on I/O module slots 0 - 3
5.5 Serial interfaces on I/O module slots 0 - 3
5.5.1 GeneralremarksonthePCD2.F2xxx
SystempropertiesofPCD2.F2xxxmodules:
ThefollowingpointsmustbeobservedwhenusingthePCD2.F2xxxinterface
modules:
● ForeachPCDsystem,upto4PCD2.F2xxxmodules(8interfaces)canbeused
 onslots0…3.
● The PCD2.M5_ system has a powerful processor which handles the application
as well as the serial interfaces. Processing of the interface modules requires
the appropriate CPU capacity. To determine the maximum communication
capacity per PCD2.M5_ system, note the following:
● The communication volume is determined by the peripheral devices connected.
This will be the case, for example, where a PCD2 is used as an S-Bus slave
 station.IfaPCD2controllerisbombardedwithheavytelegramtrafcathigh
baud rates, less CPU capacity will be left to handle the actual application. The
following rules apply here: the use of 8 interfaces at 9.6 kbps takes approx.
50% of CPU capacity. Two interfaces at 57.6 kbps also take up approx. 50% of
CPU capacity. Two interfaces at 115 kbps require approx. 60% of CPU
capacity.
● If the PCD2 is the initiator of the communication, the communication volume,
and hence the communication capacity, will be determined by the user program
 inthePCD2(PCD2usedasmasterstation).Theoretically,allinterfacescanbe
run at the maximum baud rate of 115 kbps. However, the effective data
throughput will be governed by the user program and the number of interfaces,
and may be quite low. The crucial factor is that the peripheral devices
 connectedcanberunwiththeselectedcongurationandcommunication
capacity.
5.5.2 CommunicationportsonthePCD2.M5_
ThePCD2.F2xxxmodulesaredesignedforinsertionintoslots0...3onaPCD2.M5_.
Asshowninthegurebelow,theslotsaredesignatedasfollows:
Slot0: Port100forthex.0portonthePCD2.F2xxxmodule
  Port101forthex.1portonthePCD2.F2xxxmodule
Slot1: Port110forthex.0portonthePCD2.F2xxxmodule
  Port111forthex.1portonthePCD2.F2xxxmodule
Slot2: Port120forthex.0portonthePCD2.F2xxxmodule
  Port121forthex.1portonthePCD2.F2xxxmodule
Slot3: Port130forthex.0portonthePCD2.F2xxxmodule
  Port131forthex.1portonthePCD2.F2xxxmodule