Topic: DMD0263

Help File Version: 2.10.0.636

CPU LEDs


Do-more CPUs have two-color LEDs that are used to visually provide operational status to the user. Each of the LEDs can be either RED, GREEN, or YELLOW. The LEDs can be ON continuously or blinking This gives the CPU many options for color combinations and blink patterns that can indicate different operational modes, and fault conditions, and provide diagnostic information and communication status.

 

In addition to the individual definition of each LED, there are times when the CPUs will use combinations of LED ON / OFF state and colors to convey status information. The following combinations use some or all of the LEDs:

ERR LED (BRX-DM1x & H2-DM1x) or STAT LED (T1H-DM1x) is blinking RED for (15 seconds) Do-more Designer can blink the ERR or STAT led for 15 seconds to verify that a communication link is targeting the correct CPU.

All of the LEDs are ON and the color of each LED is YELLOW indicates the boot loader has started running.

All of the LEDs are ON and the color of each LED is GREEN indicates the operating system has started running.

All of the LEDs are cycling through RED & GREEN, in a circular 'chase' pattern indicates the operating system is initializing.

The left-most LEDs are cycling through RED & GREEN, in a 'bouncing ball' pattern indicates the CPU is running only the boot loader and is NOT going to load and run the operating system. The most likely cause is having DIP switch #1 in the ON position.

All of the LEDs are ON, and the color of each LED is RED indicates that am unrecoverable hardware error has occurred. The CPU must be power-cycled to clear the error.


BRX-DM1 / BRX-DM1E LED Descriptions

 

   

PWR

OFF

Base Power of OFF.
 

GREEN - ON

 

Base Power is ON.

 

GREEN - BLINK

 

Ethernet I/O Master is downloading configuration data to the Ethernet I/O Slaves.
 

YELLOW

Battery Voltage Low - click for instructions on changing the battery.
 

 

RUN

OFF

CPU is in STOP (Program) mode.
 

GREEN

CPU is in RUN mode.
 

YELLOW

CPU has one or more locations with Forced values.
 

 

MEM

OFF

Non-volatile memory (ROM) is up to date.
 

GREEN

 

A micro-SD card is installed in the slot and properly mounted and ready for access by the BRX CPU.

YELLOW

CPU is updating non-volatile memory (ROM).
 

RED

 

A micro-SD card is in the slot but it is unmounted, it is not ready for access by the BRX CPU.

 

 

ERR

OFF

CPU is functioning normally.
 

RED - ON

 

CPU has experienced one or more of the following conditions:

A Fatal Hardware Error.
 

A Software Watchdog Error has occurred.
 

An I/O module has been removed while the CPU is in RUN mode.
 

An I/O module in an Ethernet I/O Slave base is not present.

 

RED- BLINK

 

Blink To Identify the CPU from Edit Link dialog.

 

 

RX / D-

GREEN

Serial port is receiving data, OFF means no data being received.
 

TX / D+

GREEN

Serial port is transmitting data, OFF means no data being sent.
 

 

LNK

GREEN

Ethernet Link is Good, OFF typically means the cable is not properly connected.
 

ACT

GREEN

Ethernet is sending or receiving data, OFF means no data being sent or received.
 

 


H2-DM1 / H2-DM1E LED Descriptions

 

   

 

PWR

OFF

DL205 Base Power of OFF.
 

GREEN - ON

 

DL205 Base Power is ON.

 

GREEN - BLINK

 

Ethernet I/O Master is downloading configuration data to the Ethernet I/O Slaves.
 

YELLOW

Battery Voltage Low - click for instructions on changing the battery.
 

 

RUN

OFF

CPU is in STOP (Program) mode.
 

GREEN

CPU is in RUN mode.
 

YELLOW

CPU has one or more locations with Forced values.
 

 

ROM

OFF

Non-volatile memory (ROM) is up to date.
 

YELLOW

CPU is updating non-volatile memory (ROM).
 

 

ERR

OFF

CPU is functioning normally.
 

RED

CPU has experienced one or more of the following conditions:

A Fatal Hardware Error.
 

A Software Watchdog Error has occurred.
 

An I/O module has been removed while the CPU is in RUN mode.
 

An I/O module in an Ethernet I/O Slave base is not present.

 

 

ETH

GREEN

Ethernet Link is Good.
 

YELLOW

Ethernet Activity.
 

RED

Ethernet is transmitting data.
 

 

USB

GREEN

USB is receiving data.
 

YELLOW

USB is transmitting data.
 

 

TX

GREEN

Serial port is transmitting data, OFF means no data being sent.
 

RX

GREEN

Serial port is receiving data, OFF means no data being received.
 

 


T1H-DM1 / T1H-DM1E LED Descriptions

 

   

 

RUN

OFF

CPU is in STOP (Program) mode.
 

YELLOW

CPU is in RUN mode.

 

GREEN

CPU has one or more locations with Forced values.
 

 

ROM

OFF

Non-volatile memory (ROM) is up to date.
 

YELLOW

CPU is updating non-volatile memory (ROM).
 

 

STAT

GREEN

CPU is functioning normally.
 

YELLOW

Battery Voltage Low - click for instructions on changing the battery.
 

RED

CPU has experienced one of the following conditions:

A Fatal Hardware Error.
 

A Software Watchdog Error has occurred.
 

An I/O module has been removed while the CPU is in RUN mode.
 

An I/O module in an Ethernet I/O Slave base is not present.

 

 

 

 

USB

GREEN

USB is receiving data.
 

YELLOW

USB is transmitting data.
 

 

TX

GREEN

Serial port is transmitting data, OFF means no data being sent.
 

RX

GREEN

Serial port is receiving data, OFF means no data being received.
 

 


See Also:

System Setup and Maintenance Overview
 

Changing the On-board Battery
 

Configuring the Hardware Watchdog Timer
 

LED Definitions
 

Mode Switch Position Definitions
 

DIP Switch Definitions
 

Communication Port Pinouts
 

Configuring the On-board Ethernet Port