Transparent Device Access (TDA) functionality means that clients that run (and that are connected to a , , or terminal port of a communications module) can access or download applications to devices on distributed control networks. The reverse, however, is not true. In other words, a Control Expert PC connected to the CPU’s Modbus port can access devices on other core networks, but those remote devices can not access other devices on different networks through the Modicon M340 station.
The following communication scenarios are possible:
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Ethernet port on the BMX P34 20x0x CPUs to the BMX NOE 01x0 Ethernet modules
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BMX NOE 01x0 Ethernet modules to the Ethernet port on the BMX P34 20x0x CPUs
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USB port on the BMX P34 20x0x CPUs to the Ethernet port on the BMX P34 20x0x CPUs
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USB port on the BMX P34 20x0x CPUs to the BMX NOE 01x0 Ethernet modules
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Modbus port on the BMX P34 2020 CPU to the Ethernet port on the BMX P34 20x0x CPUs
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Modbus port on the BMX P34 2020 CPU to the BMX NOE 01x0 Ethernet modules
The following figure shows three different scenarios for downloading information from a PC running Control Expert to an end device:
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scenario A: TDA through the USB port of a BMX P34 2030 CPU
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scenario B: TDA through the Modbus port of a BMX P34 2020 CPU
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scenario C: TDA through the Ethernet port of a BMX NOE 01x0 module
This figure shows the ports (identified by IP address, where applicable):
Legend:
A1: Data is sent over USB source port on a BMX P34 2030 CPU in slot position 0 of a Modicon M340 station.
A2: The program is downloaded to an Ethernet module (192.168.1.100) in a Premium rack.
(For scenario A, the Control Expert address syntax is SYS\\CPU Ethernet port rack.slot.channel{destination IP address}. Therefore, the address in the figure is SYS\\0.0.3{192.168.1.100}.)
B1: Data is sent over Modbus source port on a BMX P34 2020 CPU (Modbus address: 2) at slot position 0 of a Modicon M340 station.
B2: The program is downloaded via Ethernet to a Modbus end device (192.168.1.150).
(For scenario B, the Control Expert address syntax is CPU Modbus address\\CPU Ethernet port rack.slot.channel{destination IP address}. Therefore, the address in the figure is 2\\0.0.3{192.168.1.150}.)
C1: Data is sent over the Ethernet source port on a BMX P34 0100 CPU in slot position 0 of a Modicon M340 station.
C2: The BMX NOE 01•0 transmits over Ethernet to the Ethernet module (10.10.10.200) in a Quantum rack assembly in another network.
(For scenario C, the Control Expert address syntax is source IP address\\source port rack.slot.channel{destination IP address}. Therefore, the address in the figure is 192.168.1.3\\0.3.0{10.10.10.200}.)
