Moxa V2616A-C8-CT-W7E [52/111] Programmable led indicators

V2616A Linux Programming Guide

4-3

Operation: -h Help

-g Get interface and terminator type

-i intf Set interface type with options below

-t value Set termination resistor with options below

intf RS232 RS-232 mode

RS422 RS-422 mode

RS4852W RS-485 2-wire mode

RS4854W RS-485 4-wire mode

value NONTERM Non termination resistor

120TERM 120ohm termination resistor

For example:

To set the MUE interface

# muestty –i RS422 /dev/ttyMUE2

To set the MUE termination resistor

# muestty –t 120TERM /dev/ttyMUE2

Programmable LED Indicators

There are four programmable LED indicators on the front panel of the V2616A. The programmable LED device

file is located at /dev/pled. Each LED can be accessed via /dev/pled device node. These are the examples

to control the programable LED indicators.

Example to turn on/off the LED:

To turn on the first LED and turn off the second, third and fourth LED:

# echo 10000000 > /dev/pled

To turn off all the LEDs:

# echo 00000000 > /dev/pled

To turn on the second LED and turn off other LEDs:

# echo 01000000 > /dev/pled

To turn on the first and the last LEDs and turn off the second and third LEDs:

# echo 11010000 > /dev/pled

Digital I/O

Digital Output channels can be set to high or low. The channels are controlled by the function call

set_dout_state( ). Use the digital input channels to detect the state change of the digital input signal. The DI

channels can also be used to detect whether or not the state of a digital signal changes during a fixed period

of time. This can be done with the function call set_din_event( ).