Chapter 4: Connecting External Equipment (Optional)
64
b.
Connect an RS232-to-USB adapter (using FTDI's FT232 chip) to
the RS485-to-RS232 adapter.
c.
Connect the RS232-to-USB adapter to the USB-A port on the
EMX.
Note: DO NOT connect the Modbus RTU device or Modbus bus to the
RS485 ports on the EMX, which is NOT supported.
2.
On the EMX, enable and properly configure the Modbus Gateway
feature. See
Changing Modbus Settings
(on page 176).
Communications between Modbus TCP and RTU devices:
The EMX acts only as a message gateway for the Modbus TCP client.
Messages from the Modbus TCP client(s) are passed through the
EMX to the connected Modbus RTU devices or Modbus bus.
The Modbus RTU devices on the bus are identified with their Modbus
RTU addresses using the Modbus unit identifier addresses in the
Modbus TCP protocol.
If the Modbus TCP client does not support unit identifier addressing,
refer to
Changing Modbus Settings
(on page 176).
The EMX supports communications to multiple Modbus RTU devices.
Note that the connected Modbus RTU devices are invisible to the
EMX.
Summary of Contents for EMX2-111
Page 69: ...Chapter 4 Connecting External Equipment Optional 57...
Page 78: ...Chapter 5 Using the EMX 66 EMX2 888...
Page 442: ...Appendix A Specifications 430 RS 485 Pin signal definition 6 D bi direction al Data 7 8...
Page 488: ...Appendix E LDAP Configuration Illustration 476 2 The EMX_Admin role is created...
Page 507: ...Appendix G RADIUS Configuration Illustration 495 Note If your EMX uses PAP then select PAP...
Page 512: ...Appendix G RADIUS Configuration Illustration 500 14 The new attribute is added Click OK...
Page 513: ...Appendix G RADIUS Configuration Illustration 501 15 Click Next to continue...
