Festo PROFIBUD-DP, Elektronics Manual, Page: 65 / 154

2. Commissioning CPV−DI02 (PROFIBUS−DP)
2−7
Festo P.BE−CPV−DI02−EN en 0704NH
2.1.4 Information on commissioning
FREEZE and SYNC
The operating modes FREEZE and SYNC are supported by the
CP system in accordance with EN 50170.
The method of accessing the FREEZE and SYNC commands
depends on the controller used. Please refer here to the
documentation for your field bus module.
Ca uti o n
The operating mode FREEZE or SYNC will be reset auto
matically:
when the CP system is switched on/off
when the field bus module stops.
Only the operating mode FREEZE will be reset automati
cally:
when the bus connection to the CP system is interrupted
(response monitoring active).
FR EE Z E c o mma n d
All the outputs of the CPI system will be frozen". The CPV
Direct now sends a constant image of all the inputs to the
master. With each further FREEZE command, the input image
is updated and sent again to the master.
Return to normal operation: UNFREEZE command
SYN C c o mma n d
All the outputs of the CPI system will be frozen". The CP sys
tem now no longer reacts to modifications to the output
image in the master. With each further SYNC command, the
output image will be updated and transferred.
Return to normal operation: UNSYNC command