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Setting up a network
Restoring Parameters
Restore Parameter Signature
46
The restoring of parameter values to the default values, as defined in the
communication and manufacturer specific profile specification, is done via a
SDO access to the object at index 1011h. The following figure shows the
structure of this object.
Index
Sub-index
1011h
1011h
1011h
Reading from sub-index 01h returns the value '1', which means that the Unit
supports the restoring of parameters. The parameters are restored when the
ASCII codes for the signature text 'load' are written to sub-index 01h.
Note that the character 'l' is sent as the least significant byte, therefore the
32-bit 'value' of the signature text becomes 64616F6Ch:
d
64h
Any other value than 64616F6Ch written to sub-index 01h will result into an
abort response. If the correct signature is transmitted and the Unit is not able
to restore the parameters due to a non-volatile memory error, an emergency
message is transmitted (see section 6-2, EEC = FF00h).
Note
The restored default parameter values become active after the Unit has been
restarted by a (software) reset or after receiving the NMT command
'Reset_Communication' or 'Reset_Node'.
The storing / restoring of parameter values can also be done with a network
configuration tool that sends the correct signature.
Object
-
Restore Default Parameters
00h
Number of entries
01h
Restore all parameters
a
61h
Section 3-3
Default value
-
1
1
o
l
6Fh
6Ch
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