37 CMVPFB01A
Advanced Features
7.5 Node Address Lock
P413 - Node Address Lock
Default: 0 Range: 0 - 1
Access: RW Type: Integer
Some PROFIBUS-DP masters have the capability to set the node address remotely. While this can be a
useful feature during commissioning and or network fault recovery, it is not always desirable. Enabling
the Node Address Lock will prevent the accidental changing of the node address by preventing the master
from writing to it.
Table 37: Node Address Lock
P413 Value Description
0 Disabled
1 Enabled (address locked)
NOTE
Node Address Lock does not effect accessing the Node Address Parameter (P410) via drive
keypad access.
7.6 Sync and Freeze
7.6.1 Sync and Freeze Overview
The network master can put cyclic data into groups which allows multiple cyclic channels to be suspended
and updated using the SYNC and FREEZE commands.
The SYNC Command:
Controls data to the drive. (Dout)
The SYNC command will cause a single transfer of the previously grouped data and stop any more data
from being received by the drive.
The SYNC command may be repeated while in this state to allow another single transfer of data to the
drive.
Issuing an UNSYNC command will revert the drive to a continuous cyclic update of the received data.
The FREEZE Command:
Controls data from the drive. (Din)
The FREEZE command will cause a single update of the previously grouped Din data. In the next data
cycle, the drive transfers "frozen" data to the master.
The Din data will not be updated until the next FREEZE command is received (next "snapshot" taken)
or the FREEZE mode is cancelled by an UNFREEZE command.
Issuing an UNFREEZE command will revert the drive to a continuous cyclic update of the transmitted
data.
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