Subject: FW: My concern for Takenaka control system.
Date: Tue, 1 Feb 2000 03:06:09 -0600
From: "Reinhardt, Earl" <Earl.Reinhardt@mts.com>
To: "Thoen, Brad" <Brad.Thoen@mts.com>
CC: "Larson, Rod" <Rod.Larson@mts.com>

Are you aware of the problem for VDG? Is there a chance we might have
the same problem?
Earl

> -----Original Message-----
> From: Nakashima, Toshiaki
> Sent: Monday, January 31, 2000 8:50 PM
> To:   Imafuku, Nobuhiro; Katabami, Yoshihiro; Rood, Omar; Reinhardt,
> Earl; Nowak, Rich
> Subject:      My concern for Takenaka control system.
> Importance:   High
>
> Hello everybody,
> As you know, MTS Flex Test 2S (VDG) had a trouble in Ford about 2
> weeks ago.
> I don't know the detail, but I just worry about AESD controller also
> has a chance to get same serious situation. I have heard that Takenaka
> structural, table system had a same kind of problem just 2 weeks ago.
> It seems very similar situation like Ford.
> I know Takenaka has TestSter 2S, it is different control system. But I
> think design concept is very similar with Flex.  My worried point is
> as follows.
> 1)    Ford case
> They upgrade control system with 500MHz PC just recently. Problem
> occurred with AIC control software.
> System had an uncontrolled situation. System moved high speed to the
> full stroke.
> VGD announced that 400MHz, and 500Hz PC with Flex 2S software. ( The
> problem is a racing condition occurring when this Flex Test version is
> connected to newer 500MHz PC.)
> VDG traced the same problem in the MPLS Lab. also. (Pls. asks Jim
> Egerdal about detail information.)
>
> Then I thought, it is better to check that point with Takenaka system
> also.
> You can get more detail information in MPLS. Pls. check that Ford
> problem for latest control system applied for AEDS customer also. I
> think it is communication speed problem in the computer system with
> software structure or something. Especially related with AIC control.
> Pls. check it for Takenaka system anyway.
> Worst case, system has a chance to kill a person.
> Pls. check it.
> Best Regards
> Toshi
