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System diskettes S4C controller with ABB IRB640 M98

Hello,

I'm trying to program two ABB IRB640 M98 robots, but I've got problems with the controllers. The first controller has been cold rebooted. The second controller won't boot further than: WAIT! The system is starting up... anymore. When it did boot further I made a backup of the settings (I attached the backup as .zip file). I've got the following information about the controllers:

This was under Product ID (found when second controller still booted):
3HAB2396-2/00 System Pack 3.1
TP Language
Irb640/160
Advanced Functions

Controller 1 (cold rebooted):
Type: IRB640 M98
Robotversion: IRB640
Man Order: 133985
Ref. no: R8413301002
Serial no.: 64Z-10056
Date of manufacturing: 1998-10-21

Controller 2 (stuck at: WAIT! The system is starting up):
Type: IRB640 M98
Robotversion: IRB640
Man Order: 133984
Ref. no: R8413301001
Serial no.: 64Z-10055
Date of manufacturing: 1998-10-22

I don't have the system diskettes of these controllers, but I've got the system disks of an ABB IRB6400, with System Pack 3.2 (3HAC2700-2).
Is there a way to retreive the files necessary (I believe KEY.txt and KEY.ID) from the controllers or backup (attached), so I can use the diskettes of the IRB6400 to install my controllers? Or does someone have the right diskettes for me?

Thanks in advance,
Koen