ICP DAS USA PDS-220F Series User Manual page 70

Programmable Serial-to-Fiber Device Server
6.2 Access Modbus Device via Virtual COM Ports
If you want to use Modbus/RTU command to access the Modbus device through Virtual COM Ports,
you can refer to below steps.

Step 1: Configuring COM Ports for Virtual COM
1. Enter the URL address of the PDS-220Fx in the address bar of the browser to log in to the web
configuration pages. (refer to Figure 6-1-1 )
2. Click the "COM Port Settings" item to configure the COM ports, and then confirm that serial
COM ports of PDS-220Fx are not in the M3 mode (Modbus Gateway).
Note:
If the serial COM Port is M3 Mode (Modbus Gateway), refer to the
(Modbus Gateway)" to disable it.
PDS-220Fx Series User Manual

Figure 6-2-1
Section 6.2.1 "How do I disable the M3 Mode
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