Timebombing a change

[BKulpa]

Does anyone know of a way to timebomb a change?
Say I want to make an assignment to change a tolerance for a specific amount of days, then revert to the original tolerance.

ASSIGN/START_DATE=SYSTEMDATE("MM")*SYSTEMDATE("dd")
ASSIGN/END_DATE=36-START_DATE

Start_date is multiplying the month times the day
end date is the number of days from the beginning of the year minus the current number of days that have elapsed.

[A-machine-insp]

If/End If comment with a variable? If date=> (date) Assign tol=****, if date< (date) Assign tol=**** ?

Just spitballing here but that's my first thought.

[AndersI]

If you use an ISO format for dates, you can just compare today against limits with >= and <=, and use the fact that TRUE is 1 and FALSE is 0.

Example:

ASSIGN/MOD_VALID_FROM="20200128"
ASSIGN/MOD_VALID_TO="20200204"

ASSIGN/CURDAT=SYSTEMDATE("yyyyMMdd")

ASSIGN/V1=(CURDAT>=MOD_VALID_FROM)
ASSIGN/V2=(CURDAT<=MOD_VALID_TO)
ASSIGN/MOD_VALID=(V1) AND (V2)

DIM LOC2= LOCATION OF CIRCLE CIR10 UNITS=MM ,$
GRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=BOTH HALF ANGLE=NO
AX NOMINAL MEAS +TOL -TOL DEV
D 9.900 9.900 0.100[COLOR=#e74c3c]+MOD_VALID*0.1[/COLOR] -0.100[COLOR=#e74c3c]-MOD_VALID*0.1[/COLOR] 0.000 ----#----
END OF DIMENSION LOC2

I split up the condition to make it easier to read, it could of course be a single ASSIGN

ASSIGN/MOD_VALID=(CURDAT>=MOD_VALID_FROM) AND (CURDAT<=MOD_VALID_TO)

Edit: But this is quite a dangerous thing to do, all to easy for anyone to change the MOD_VALID_TO to have the larger tolerance back after it has expired...

[BKulpa]

ASSIGN/MOD_VALID=(CURDAT>=MOD_VALID_FROM) AND (CURDAT<=MOD_VALID_TO)

I'm not following what type of evaluation is being performed here.

[AndersI]

That's why I showed it split up in the original code. The first part checks that TODAY is on, or after, MOD_VALID_FROM, the second part checks that it's on, or before, MOD_VALID_TO. Each half will get the value 0/1 (FALSE/TRUE). Combining them with AND will still give a value 0/1 which is used as multiplier on the tolerance modification part.