Integrating a DeviceNet device without EDS file

A DeviceNet device without EDS file can be integrated via the "Miscellaneous" option:

Terminate EDS file selection with "Cancel". A general DeviceNet device is created.

Selection of the IO mode and the general configuration must then be carried out manually.

DeviceNet IO modes

For DeviceNet devices the EL6752 supports the DeviceNet modes cyclic polling, change of state / cyclic and bit strobe. The IO modes can be selected according to the DeviceNet specification.

The DeviceNet IO mode cyclic polling is the default selection for the EL6752:

IO mode	Input data length / bytes	Output data length / bytes
Polling	0 - 255	0 - 255
Change of State	0 - 255	0 - 255
Cyclic	0 - 255	0 - 255
Bit strobe	1 bit	0-8
Total of all IO data	max. xxx bytes	max. xxx bytes

polling / change of state (COS) / cyclic

The cyclic polling mode is characterized by cyclic polling of the IO data by the master. The change of state mode is characterized by event-oriented sending of IO data. In cyclic mode the IO data are sent cyclically based on the communication parameters configured by the master. The settings are identical for these modes.

The input and output data lengths must be supplemented according to the device configuration:

Integrating a DeviceNet device without EDS file 2: — Supplementing the input and output data

Input or output data must be appended depending on the device configuration. Any data type can be selected:

Integrating a DeviceNet device without EDS file 3: — Add Variables

The data length is converted to a byte stream according to the DeviceNet specification and displayed in the tab for the corresponding connection:

Integrating a DeviceNet device without EDS file 4: — "Connection" tab showing connection type "Polling" and input and output parameters

	Maximum data length The maximum data length per data direction is 255 bytes.

Bit strobe

The IO mode bit strobe involves an 8-byte command from the master to the slaves. For each possible address/MAC ID (DeviceNet address space: 64) 1 bit of user data is allocated. The maximum length of the response message from the slave is 8 bytes. It is sent to the master immediately when the bit strobe command is received.

After selection of the bit strobe mode the input data must be configured accordingly. Any data type can be selected (see polling/ COS / cyclic). The data length is converted to a byte stream according to the DeviceNet specification and displayed in the tab for the bit strobe connection:

Integrating a DeviceNet device without EDS file 6: — "Connection" tab showing connection type "Bit Strobe" and input and output parameters

	Maximum data length The maximum input data length is 8 bytes. The output data length is fixed.

Since the communication settings are specified through the master no further settings are possible.