STATUS - The Green LED
The STATUS LED indicates when the T-series device is performing autonomous tasks, such as running an on-board Lua script or streaming. The STATUS LED will blink according to the following rules:
-
Continuously while stream is running.
-
Once when a Lua script accesses a Modbus register.
-
Twice every 2 seconds when the T8 is in recovery mode.
-
In conjunction with the COMM LED. See the Combined LED Activity section.
COMM - The Yellow LED
The COMM LED's primary purpose is to indicate packet transfer. The COMM LED will blink according to the following rules:
-
Once for each packet transferred. At high packet transfer rates the LED will blink at 10Hz, even if more than 10 packets are being processed per second.
-
Continuously when stream mode is running.
-
A few times after successfully connecting to a USB host.
-
In conjunction with the STATUS LED. See the Combined LED Activity section.
Normal Behavior
Here are 3 examples of normal LED behavior. For troubleshooting it is useful to compare these examples to what you see on your device.
Power-Up
-
Both LEDs blink rapidly for about 1 second.
-
COMM solid off and STATUS solid on.
-
If USB enumerates, COMM blinks a few times and then stays solid on.
Idle
Both LEDs solid on. No blinking
While Viewing Kipling's Dashboard
Green LED solid on. Orange LED also solid on but with a quick double-blink once per second.
Combined LED Activity
-
When the LEDs blink together, the T-series device is computing checksums.
-
When the LEDs are alternating, the T-series device is copying a firmware image.
Troubleshooting
If LED behavior is not normal, please see USB Communication Failure.
LED Configuration
The LED mode can be set using the following registers:
When POWER_LED is set to manual mode, the LEDs can be turned on and off using the following registers: