User manual

Toolbox 32 User Manual 1.47d www.cse-semaphore.com/mykingfisher
Page
214
Redundant PCs
Two or more PCs running SCADA or Toolbox 32 software can be connected to the one RTU as illustrated
below. All the PCs can poll the same data and set the same outputs. If one PC fails, the other PCs will
continue to operate normally.
CP11 MC11
PS11
SCADA
CP11 MC11
PS11
SCADA
Ethernet
Crossover
Cable
RS232
Serial
Crossover
Cable
SCADA
RS485
Serial
Cable
Ethernet
Straight
Through
Patch Cables
Ethernet
Network
SCADA
SCADA
SCADA
Each PC can be assigned its own RTU port or all the PCs can share one Ethernet port by using an Ethernet
Network. Note: a CP-11/MC-11 Ethernet port can handle communications with up to four devices or RTUs
simultaneously.
All the PCs can run the same SCADA software configurations with one exception. Each PC must be
assigned a unique RTU address in the range 251-255 to prevent communication conflicts.
In the example below, address 254 (fe Hex)is assigned to a PC running Citect SCADA software. The
address field for the KINGFISH driver is defined as MasterRTU, ViaRTU, InitiatingRTU. Address 0 can be
used for the Master RTU. Via RTU is usually 0 and InititatingRTU is the address of the Citect PC. The
KINGFISH driver uses address 255 for Citect by default.