Momentum Modbus Plus 170 PNT Series Guía de usuario Pagina 202

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Configuring an M1 CPU with Modsoft
202
870USE10110 July 2004
Changing the Protocol on Modbus Port 2 on Momentum Components
Overview If your Momentum M1 CPU is using the Modbus port 2 provided by the 172 JNN 210
32 option adapter, you can specify whether it will use the RS232 or RS485 protocol.
The factory-set default for Modbus port 2 is RS232.
If you are using the Modbus port 2 provided on the 171 CCS 780 00 or 171 CCC 780
10 processor adapter, the port is hardwired as a dedicated RS485 protocol.
However, you must change the default setting on the port editor screen from RS232
to RS485, or the port will not function.
Procedure From the port editor screen, perform the steps in the following table to change the
protocol on Modbus port 2.
Step Action
1 Place the cursor on the current Protocol entry for Modbus port 2. Push <Enter>.
Result: A popup window appears in the top left corner of the screen displaying the
two protocol options.
2 Use an arrow key to toggle the cursor onto the desired protocol selection in the
popup window, then push <Enter>.
Result: The Port editor screen is updated with the protocol you have specified.
Utility
Default
Bridge Quit
F1
EST
F6
F7 Lev 8 F8 OFF F9F3 F4 F5
PORTS Bridge Mode: N
RS232
RS485
Number Mode Data Parity Stop Baud Head-Slot Address Delay Protocol
Bits Bits
MODBUS
01 ASCII 7 ODD 1 4800 0 247 10ms
02 RTU 8 EVEN 1 9600 0 1 10ms RS232
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