BECKHOFF EL9xxx - Manual (Page 56)

Basics communication
Different CoE parameter types are possible, including string (text), integer numbers, Boolean values or larger
byte fields. They can be used to describe a wide range of features. Examples of such parameters include
manufacturer ID, serial number, process data settings, device name, calibration values for analog
measurement or passwords.
The order is specified in 2 levels via hexadecimal numbering: (main)index, followed by subindex. The value
ranges are
• Index: 0...65535
• SubIndex: 0...255
A parameter localized in this way is normally written as x8010:07, with preceding "x" to identify the
hexadecimal numerical range and a colon between index and subindex.
The relevant ranges for EtherCAT fieldbus users are:
• x1000: This is where fixed identity information for the device is stored, including name, manufacturer,
serial number etc., plus information about the current and available process data configurations.
• x8000: This is where the operational and functional parameters for all channels are stored, such as
filter settings or output frequency.
Other important ranges are:
• x4000: In some EtherCAT devices the channel parameters are stored here (as an alternative to the
x8000 range).
• x6000: Input PDOs ("input" from the perspective of the EtherCAT master)
• x7000: Output PDOs ("output" from the perspective of the EtherCAT master)
Note
Availability
Not every EtherCAT device must have a CoE list. Simple I/O modules without dedicated
processor usually have no variable parameters and therefore no CoE list..
If a device has a CoE list, it is shown in the TwinCAT System Manager as a separate tab with a listing of the
elements:
Fig. 43: "CoE Online " tab
EL9xxx 56 Version 3.1