AB PLC to LAN/GPIB gateway (E2050) connectivity


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We have a number of programmable instruments connected to a number of GPIB controllers. These GPIB controllers will be controlled by a PLC
through control CoProcessor via Ethernet network and E2050 Lan/Gpib gateway will be used to transfer commands from the PLC to the respective
GPIB controller and hence to the specific instrument.
AB control coprocessor works on OS/9 operating system. I want to write an application using VISA library to issue necssary read/write
commands to the GPIB devices from control coprocessor.
Is there any driver available on OS/9 to work with VISA libraries to access GPIB devices through E2050 gateway. Can any one suggest a
solution to this problem?