[?]: PROFIBUS start-up time & VIPA

[Trafo]

I have master VIPA314-6CG03 and 3 profi bus slaves.
Festo unit, Control tehniques servo drive PS1402 and ferq. inverter commander SK.
CPU314, festo unit and servo drive has the same supply for communication, but SK is powering up only after CPU starts.
CPU start-up time without SK in PB configuration is ca. 15 seconds, what is somehow acceptable.
CPU start-up time with SK in PB configuration is ca. 1.5 min.

Is it possible somehow to disable hardwer control of particular slave during start-up?
With best regards.

[luke12faulin]

yes, Better add "OB87" to interrupted of Communication Fail.
Communication Error Organization Block (OB87)
Description
The operating system of the CPU calls OB87 when an event occurs that was triggered by a communication error.
If you have not programmed OB87 and a start event for OB87 occurs, your CPU will react as follows:
· An S7-300 CPU changes to STOP mode.
· An S7-400 CPU does not change to STOP mode.

and also give the Time interval of Master Synchronizing little bit longer (ex. 1 minute).

[Trafo]

I have OB87 included. I will try to adjust Time interval of Master Synchronizing .
Thank you.