On the device, colored light diodes (LED) show the operating status of the device.

Operating status

LED

State

Description

Run (green)

flashing

Ready for operation, power supply connected

flashing rapidly

Update mode or reset to default settings (S10 pushbutton)

on

Boot phase

3.3Mb (yellow)

off

No 3Mbit input signal detected

flashing

3Mbit input signal connected, but the device is not configured for this mode

flashing irregularly

32Mbit Flex mode: TCP/UDP/IP telegram detected via FO

on

Compatibility mode: valid 3Mbit signal detected

32Mb (white)

off

No 32Mbit input signal detected

flashing

32Mbit input signal connected, but the device is not configured for this mode

on

Valid 32Mbit input signal detected

Error (red)

off

Normal operation

flashing

Defect (configuration error)

on

Hardware error

PROFIBUS

LED

State

Description

Run (green)

off

Boot phase

flashing

Normal operation

Bus (yellow)

off

Boot phase / no PROFIBUS communication detected

flashing rapidly

At least one master active on the DP, but none of the configured slaves is active

flashing

At least one master and one slave active on the DP, but not all slaves that have been configured.

on

All configured masters and slaves active on the DP

Active (white)

off

Boot phase / no active slave configured in the device

flashing rapidly

No active slave in data exchange (with bus connected)

flashing

Not all active slaves in data exchange (with bus connected)

on

All active slaves in data exchange (with bus connected)

Error

(red)

off

Normal operation

flashing

Sporadic failures on the DP

on

Error on the DP line