LED Panel

The BMXSDI1602 digital input module presents the following LED panel on its front face:

1 Module state LEDs

2 Channel state LEDs for Rank A

3 Channel detected error LEDs for Rank A

4 Channel state LEDs for Rank B

5 Channel detected error LEDs for Rank B

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 BMXSDI1602 digital input module:

Module LEDs

Module State

Recommended Response

Run

Err

I/O

LCK

Blinking

Blinking1

Blinking1

Blinking1

Auto-test at power-on.

–

Blinking

ON

OFF

Blinking1

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

Replace the module.

Blinking

ON

ON

Blinking1

  • Auto-test module at power-on has detected an internal error on input 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

XX

ON

X

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

  • External error detected on input channel.

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

  • Refer to Channel Diagnostics.

ON

Blinking1

X

X

No communication between CPU and module.

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.

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

ON

Flickering2

X

ON

Communication not safe and configuration locked.

  • 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

Input channel Internal error detected.

Replace the module if the condition persists.

ON

OFF

OFF

OFF

Communication with CPU is OK and the configuration is unlocked.

–

ON

OFF

OFF

ON

Communication with CPU is OK 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 BMXSDI1602 digital input module to diagnose channel status:

Module LEDs

Channel LEDs

Channel State

Recommended Response

Run

Err

I/O

LCK

Channel State (LED 0...7, Rank A/B)

Detected Error (LED 0...7, Rank A/B)

ON

OFF

OFF

X

ON

OFF

Input state on.

–

ON

OFF

OFF

X

OFF

OFF

Input state off.

–

ON

ON

OFF

X

OFF

ON

Input state off. An internal error is detected on the channel.

To change the module if condition is persistent

ON

ON

ON

X

OFF

ON

External 24 Vdc power supply is out of range.

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

ON

OFF

ON

X

X

Blinking1

The input is in either:

  • An open circuit condition; or

  • A short-circuit condition with the 0 Vdc.

Verify that the cabling is operational and properly connected.

ON

OFF

ON

X

X

Flickering2

The input is in either:

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

  • A short-circuit condition with the 0 Vdc.

Verify that the cabling is operational and properly connected.

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