Disable ProfiSafe

Good day,
I have a problem with PROFINET SAFETY.It is

SRVO-419 PROFIsafe comm. error 1,1.

When I am in T1 mode it is possible to BYPASS it from MENU->0-> SYSTEM(6)-> DCS(8) ->PROFINET Safety(14) -> Change "ENABLE" to "BYPASS". But in T2/Auto mode it is not possible. If I change it to BYPASS it is changing to ENABLE automaticly. I am using classic S7-315 without Profisafe cards. The only safety thing I am using is DCS which are connected to CRMB2 in fanuc controller (I belive it is standard inputs for safety in every fanuc). Do you have any idea how to disable this error?
Thanks

Edit:
I am using M710-iC-50 Robot and R30-iB Controller. It is welding process.

Quote from Nation

Set the following variables:

$PNSF_SET.$BY_PWFAIL = 0
$PNSF_SET.$BY_PLCCON = 0
$PNSF_SET.$BY_PLCRUN = 0
$PNSF_SET.$BY_T1ONLY = 0

Thanks for reply. I found it. I'll try to change it when I will be next to robot.

Right now it is possible to set BYPASS for good on Profinet Safety. So I think it is enough for me. Thank you