Mitsubishi FX0N-32NT-DP, User Manual

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FX0N-32NT-DP Profibus-DP Interface Unit Buffer Memories (BFMs) Allocation 4
4-8
4.7.1 Global Control Command
The global control commands are processed by the 32NT-DP itself and require no specific
measures from the programmable controller user program.
1) Clear data global control
When this command is received, the 32NT-DP clears the output data.
2) UNFREEZE global control
The UNFREEZE command stops freeze control mode. Data written with a TO instruction is
immediately sent to the DP-master.
3) FREEZE global control
The DP-master sends a FREEZE control command to a group of DP-slaves to freeze their
current input states. Data written with a TO instruction is withheld until the next FREEZE/
UNFREEZE command is received.
4) UNSYNC global control
The UNSYNC command stops SYNC control mode. Data sent from the DP-master is
immediately transmitted to the BFM to be read using a FROM instruction.
5) SYNC global control
The DP-master sends a SYNC control command to a group of
DP-slaves to synchronize their current output states. Data read with a FROM instruction
remains constant until the next SYNC/UNSYNC command is received.