LED Panel

The BMXSDO0802 digital output module presents the following LED panel on its front face:

1 Module state LEDs

2 Channel state LEDs

3 Channel detected error LEDs

NOTE: When a channel error is detected, the corresponding LED remains ON until the underlying condition is resolved.

Module Diagnostics

Use the four LEDs at the top of the LED panel to diagnose the condition of the BMXSDO0802 digital output module:

Module LEDs

Module State

Recommended Response

Run

Err

I/O

LCK

Blinking1

Blinking1

Blinking1

Blinking1

Auto-test at power-on.

–

Blinking1

ON

OFF

Blinking1

Auto-test at power-on has detected an internal error on output channels.

Replace the module.

Blinking1

ON

ON

Blinking1

  • Auto-test module at power-on has detected an internal error on output channels; or

  • External 24VDC power supply is out of range

Verify the external pre-actuator 24 Vdc power supply is operational, and connect the 24 Vdc supply.

OFF

ON

OFF

OFF

Internal error detected.

Replace the module if the condition persists.

OFF

Blinking1

OFF

X

Non-configured I/O module.

Configure the module via the CPU.

X

X

ON

X

  • External 24 Vdc power supply is out of range; or

  • External error detected on output channel.

  • Verify the external pre-actuator 24 Vdc power supply is operational.

  • Refer to Channel Diagnostics (below).

ON

Blinking1

X

X

No communication between CPU and module. The module is in Fallback state (or in Reset if module has never been operating normally).

Verify that:

  • The CPU is an M580 safety CPU and that it is operational.

  • The backplane is operational (if I/O module is on main rack).

  • The cable between the CPU and I/O module is operational and properly connected (if the I/O module is on an extended or remote rack).

ON

Flickering2

X

OFF

Communication not safe and configuration unlocked. The module is in Fallback state (or in Reset if module has never been operating normally).

To verify the variables available to debug safe communication in DDDT

ON

Flickering2

X

ON

Communication not safe and configuration locked. Module is in Fallback state.

  • Verify the locked configuration in the module is equal to the module configuration stored in application in the CPU as configured using Control Expert.

  • Debug the condition using the DDDT variables for the I/O module instance.

ON

ON

OFF

X

Internal error detected on an output channel.

Replace the module if the condition persists.

ON

OFF

OFF

OFF

Communication with CPU is safe and the configuration is unlocked

–

ON

OFF

OFF

ON

Communication with CPU is safe and the configuration is locked.

–

X indicates the LED state can be either ON or OFF.

1. Blinking: 500 ms ON / 500 ms OFF.

2. Flickering: 50 ms ON / 50 ms OFF.

Channel Diagnostics

Use all the LEDs on the BMXSDO0802 digital output module to diagnose channel status:

Module LEDs

Channel LEDs

Channel State

Recommended Response

Run

Err

I/O

LCK

Channel State (LED 0...7)

Detected Error (LED 0...7

ON

OFF

OFF

X

ON

OFF

Output state on.

–

ON

OFF

OFF

X

OFF

OFF

Output state off.

–

ON

ON

OFF

X

OFF

ON

Output state off. Internal error detected on output channel.

Replace the module if the condition persists.

ON

ON

ON

X

OFF

ON

External pre-actuator 24VDC power supply is out of range

Verify the 24 Vdc power supply is operational.

ON

OFF

ON

X

OFF

Blinking1

The output is in:

  • An open circuit condition; or

  • A short-circuit condition with the 0 Vdc; or

  • In voltage overload.

Verify that the cabling is operational and properly connected.

ON

OFF

ON

X

ON

Flickering2

The output is in:

  • A short-circuit condition with the 24 Vdc; or

  • A short-circuit condition with another active output channel.

Verify that the cabling is operational and properly connected.

X indicates the LED state can be either ON or OFF.

1. Blinking: 500 ms ON / 500 ms OFF.

2. Flickering: 50 ms ON / 50 ms OFF.