KEYENCE DL-PD1 - Manual (Page 61)

3-7 Other functions
3-37 - PROFIBUS DP Compatible Network Unit DL-PD1 User's Manual (GT2) -
Execu
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cat
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3
FREEZE/SYNC/CLEAR command
The following are the DL-PD1's operations when the SYNC command or FREEZE
command is notified to the DL-PD1 from PROFIBUS DP master.
 Operation when the FREEZE command is notified
The input data (e.g. sensor amplifier control output, comparator value, etc.) on the cyclic
communication is fixed to the condition immediately before the FREEZE command is
notified. If the FREEZE command is notified again, the condition will be updated.
The FREEZE command does not affect the output data (external input to the sensor
amplifier) of the cyclic communication.
 Operation when the SYNC command is notified
The output data (external input to the sensor amplifier) on the cyclic communication is
fixed to the condition immediately before the SYNC command is notified. If the SYNC
command is notified again, the condition will be updated.
This is used when setting the external input to multiple sensor amplifiers with the same
timing.
The SYNC command does not affect the input data (sensor amplifier control output,
comparator value, etc.) of the cyclic communication.
 Operation when the CLEAR command is notified
The output data (external input to the sensor amplifier) of the cyclic communication is
cleared. (0 is set.)