PC Based Automation

Download DLL Modbus Now

JBUS/MODBUS Protocol

Direct Interfacage on the serial link of your PC.

for applications in Delphi, Visual Basic, C++, Windev etc

Librairy of procedures and functions :

OpenCom	Open a communication port.
DisableCom	Close the communication port.
ReadWords	Reading of consecutive words in a slave.
WriteWords	Writing consecutive words in a slave.
ReadBits	Reading consecutive bits in a slave.
WriteBits	Writing consecutive bits in a slave.
TimeOutValue	Fixing the Timeout value for the communication.

The TModbus.exe utility allow to check the communication between the PC et the target (plc, remote I/O, ...).

MODBUS Server


		Modbus server Documentation	Download Modbus Server Now

Le serveur Modbus permet :

Cyclic or acyclic communication Modbus/JBus with slaves (I/O PLCs.) connected to the serial Port Com of your PC.

The server refresh recurringly a database of variables in memory.

The communication server read and write the values into a database of variables to send to the equipments.

Run in back task with high priority in the task bar of windows.

Run under all versions of Windows.

Useable under every high level languages by procedures and functions in a DLL (VPLC.DLL) or by Automation object (inprocserver)

located in VPLCOM.DLL.

The Modbus server is an OPC Server.

The Modbus setting allow to associate variables for each Modbus communication. The user's program or scada use these variables.

The programmer does not need to manage the communication, only the
reading and writing of variables.

When launching the Profibus server positions in the tasks bar of Windows