LED on IO-Link Ports Blinking Red
Per the operating instructions, a blinking red LED on IO-Link ports indicates a transmission error. Further details are not provided in this description. The following causes are shown:
IO-Link Status Indicators
| Status LED | IO-Link State | Description |
|---|---|---|
| yellow | off | Port configured as DI/DO: pin 4 (C/Q) = OFF |
| on | Port configured as DI / DO: pin 4 (C/Q) = ON | |
| green | flashes 1 Hz | Port configured as IO-Link: no IO-Link device detected |
| flashes 2 Hz | Port configured as IO-Link: PROOPERATE state | |
| on | Port configured as IO-Link: OPERATE state | |
| red | flashes 2 Hz | Port configuration error or short circuit or overload (US) |
| on | Transmission error |
Digital Input (DI) Status Indicators
| Status LED | Digital Input State | Description |
|---|---|---|
| DI yellow | off | Digital input: pin 2 (DI) = OFF |
| on | Digital input: pin 2 (DI) = ON |
Technical Information & Vendor Details
Version: V1.1.3
Release Date: 2014-05-16
Copyright 2014, Builder: 2.3.3.8, Time: 07:49:37
S15
Vendor ID: 310 (0x0136) Bytes: 01 54 / 0x01 0x36
Vendor Name: ifm electronic gmbh
Vendor Text: ifm electronic gmbh
Vendor URL: http://www.ifm.com/ifmgb/web/io-link-download.htm
Device ID: 54 (0x000036) Bytes: 00 00 54 / 0x00 0x00 0x36
Common Causes for Blinking Red LED
- Most commonly, this occurs when the port has been assigned for parameter storage/writing and the vendor and/or device ID of the device does not match the assignment in the configuration tags. The vendor ID and device ID can be found in the IODD PDF document at the top left of the first page.
- When the port is set up for data storage and an IOL V1.0 device has been connected to the port, the LED will also blink red. Parameter sets from IOL V1.0 devices cannot be stored.
- While not often an issue with the EIP blocks, this error will occur when the Port_Process_Data_Size is set up for 2 bytes of IOL data per port and a sensor that requires more bytes is connected. In this case, the data size must be increased.
- With most other PLCs, the individual ports are defined as 2 bytes, 4 bytes and so on. As above, when a sensor requiring a larger byte size is connected, the LED will flash red on the port.
