Serial port Configure Modbus mode
Digi Connect EZ Mini User Guide
146
1. Log into the Connect EZ WebUI as a user with Admin access.
2. On the menu, click System. Under Configuration, click Serial Configuration.
The Serial Configuration page is displayed.
Note You can also configure the serial port by using Device Configuration > Serial. Changes
made by using either Device Configuration or Serial Configuration will be reflected in both.
3. Click the name of the port that you want to configure.
The serial port is enabled by default. To disable, toggle off Enable.
4. For Mode, select Modbus.
5. Enable Altpin to use the Altpin feature. Altpin is disabled by default.
This feature should be enabled when you are using a modem and an 8-pin cable and you need
CD(Carrier Detect). When enabled, the DTR on pin 1 drives DCD.
If altpin is disabled, the hardware signal on RJ45 pin 1 becomes DSR instead of DCD. This
alternative can be used if DCD is not required, and DSR is needed instead.
6. (Optional) For Label, enter a label that will be used when referring to this port.
7. For Signalling, select the electrical signaling interface type used on this serial port:
n RS-232
l Enable RTS Toggle if you want to enable RTStoggling during transmission on this
serial port. If enabled, this setting overrides RTS\CTSflow control.
l For RTS Pre-delay, enter the amount of time RTSis asserted before starting data
transmission. The time is measured in milliseconds. The default is 0ms.
l For RTS Post-delay, enter the amount of time RTSis deasserted before completing
data transmission. The time is measured in milliseconds. The default is 0ms.
n RS-422
l Enable Termination if you want to enable electrical termination on this serial port.
n RS-485
l Enable Termination if you want to enable electrical termination on this serial port.
l Enable Full Duplex if you want to enable full duplex communication on this serial
port.
The default is RS-232.
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