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<$Updated: 05-Mar-09 11:08:48$>


CPTT and MODBUS


[ MODBUS ] was developed by Modicon in the 70s. It is a simple way to build a Master/Slave connection to an IED (Intelligent End Device).


MODBUS has spread strongly worldwide.


MODBUS serial

MODBUS is used as a simple transmission protocol to terminal devices (RTUs oder IEDs). It has general abilites within the context of SCADA applications.
The messages are generally transmitted through serial connections.

COMPROTware:Testtool offers in this protocol:

  • Simulation of Master and Slave Station.
  • Extensive state engine to implement protocols.
  • Monitoring on the serial line (seriellen Leitung).
  • Interactive input of messages.
  • Different application oriented view formats for message traffic.


(click to enlarge)

(click to enlarge)


MODBUS TCP/IP

MODBUS TCP/IP is intended for connections through the TCP internet protocol. It has the same Application Layer message format but a different Link Layer frame format as MODBUS serial.

COMPROTware:Testtool offers in this protocol:

  • Simulation of Master and Slave Station.
  • Extensive state engine to implement protocols.
  • Network Monitoring under MS Windows 2000 and Windows XP.
  • Interactive input of messages.
  • Different application oriented view formats for message traffic.


(click to enlarge)

(click to enlarge)



Any questions regarding CPTT? Please contact us:
[ e-mail cptt@realthoughts.de ]