Eaton Electrical PROFIBUS-DP EZ204-DP ユーザーズマニュアル

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MN05013001E

The Control commands 9 bytes module allows extended data 

exchange of the EZ800 and the EZD on the PROFIBUS-DP 

communication bus. This allows you to transfer services from 

the following areas:
• Read/write date and time (Page 95)
• Read/write image data (Page 99) and
• Read/write function block data (Page 120).

A data exchange procedure is required in order to ensure the 

safe exchange of data via PROFIBUS-DP from master to 

slave and vice versa.

Requirement:

The “Control commands 9 byte” module must have been 

selected.
The master initiates the data exchange of the control 

commands and the addressed slave responds.
During communication 9 data bytes (byte 0 = toggle byte, 

bytes 1 to 8 information bytes) are sent via PROFIBUS.
The basic telegram structure is shown in the following 

diagram.

Attention!
While a control command is being executed, the input and 

output data will remain in the state before the control 

command was called. Only after the “Control commands” 

data exchange has been completed, will the I/O data be 

refreshed.

Only those values specified for the command code should 

be used.
Check the values that you write in order to avoid 

malfunctions.