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.
Содержание EMX2-111
Страница 69: ...Chapter 4 Connecting External Equipment Optional 57...
Страница 78: ...Chapter 5 Using the EMX 66 EMX2 888...
Страница 442: ...Appendix A Specifications 430 RS 485 Pin signal definition 6 D bi direction al Data 7 8...
Страница 488: ...Appendix E LDAP Configuration Illustration 476 2 The EMX_Admin role is created...
Страница 507: ...Appendix G RADIUS Configuration Illustration 495 Note If your EMX uses PAP then select PAP...
Страница 508: ...Appendix G RADIUS Configuration Illustration 496 10 Select Standard to the left of the dialog and then click Add...
Страница 509: ...Appendix G RADIUS Configuration Illustration 497 11 Select Filter Id from the list of attributes and click Add...
Страница 512: ...Appendix G RADIUS Configuration Illustration 500 14 The new attribute is added Click OK...
Страница 513: ...Appendix G RADIUS Configuration Illustration 501 15 Click Next to continue...
