Write CoE parameters

1. Send a "Write Request" with the content specified below

The ER9320-0022 sends a "Write Response"

2. Wait 250 to 500 ms

3. Send a "Read Request" with the content specified below

The ER9320-0022 sends a "Read Response". The "Read Response" contains the information as to whether the write process was successful.

Wireshark® example for writing: Download

Write Request

PROFINET record data	Value	Meaning
Slot	Position of the EtherCAT device (1...255)	Slot number, position of the EtherCAT device
SubSlot	1	Sub slot number, always "1"
Index	0x200F	PROFINET index number
Length	4	Length of the following data
Data	Bytes 1…2: CoE index Byte 3: CoE subindex Byte 4: "1", constant Bytes 5…8: length as DWORD Bytes 9…x: CoE data value	CoE data

PROFINET record data	Value	Meaning
Slot	Position of the EtherCAT device (1...255)	Slot number, position of the EtherCAT device
SubSlot	1	Sub slot number, always "1"
Index	0x200F	PROFINET index number
Length	0	Length of the following data
Data	-	CoE data

PROFINET record data	Value	Meaning
Slot	Position of the EtherCAT device (1...255)	Slot number, position of the EtherCAT device
SubSlot	1	Sub slot number, always "1"
Index	0x200F	PROFINET index number
Length	4	Length of the following data
Data	ADS return code	CoE data

The ADS return code is "0" if the response is error-free. A list of ADS return codes can be found in the "ADS basics" manual: https://infosys.beckhoff.com/content/1033/tc3_ads_intro/index.html

	Start-up parameters overwrite CoE data CoE data are typically not stored in the EtherCAT device. Make sure that the CoE data are overwritten again by the Start-up parameters (GSDML) when starting the ER9320-0022.