JVL FBG10, User Manual

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20 JVL Industri Elektronik A/S — User Manual — Field Bus Gateway FBG-10
3.5 Sync and Freeze mode
Certain DP-slaves support the functions SYNC and FREEZE:
SYNC:
This function causes that process data can be sent to a group of slaves. These data does
however only have effect when a SYNC-command is sent to the group. As the whole
group receives this command syncronously, the new process data are also executed syn-
cronously even if data is received asyncronously.
FREEZE:
This function causes that a group off DP-slaves freezes data from the process. After the
master has given this command, the master can asyncronously fetch data from each slave
in the group. These data will have been read syncronously by the selected group of DP-
slaves.
As the RS 232 protocol between FBG10 and motor controller does not include corre-
sponding syncronisation-mechanisms, these functions are not supported by FBG10 on
PROFIBUS.