Eaton EASY222-DN, User Manual

Page: 103 / 284

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09/10 MN05013007Z-EN
7 Control commands for easy700
Control commands can be used to initiate data exchange for
special services:
• „Read/write date and time“ (page 101)
• „Read/write image data“ (page 105)
• „Read/write function block data“ (page 126).
For this the message transfer protocol of the explicit
messages is accessed in the master controller. The parame-
ters are addressed via the service code 32
hex
. The assigned
attribute ID is here used to distinguish between different
parameters and functions.
A data exchange procedure is required in order to ensure the
safe exchange of data via DeviceNet from master to slave
and vice versa.
Service code Object address
Class ID Instance ID
32
hex
64
hex
01
hex
h
Attention!
The I/O data retain their previously defined state while a
control command is being executed. The I/O data will not
be updated until data exchange for the control command
has been terminated.
i
Caution!
You may use only the values specified for the instruction
code.
Verify data to be transferred in order to avoid unnecessary
errors.