isochromatic plot

[ChessFalconer]

Hello
Does anybody knows how to plot the isochromatics on ansys? In a plane stress problem with one sigma =0 I want to plot de diferecen between the othes two sigmas. The null sigma can be S1 or S2 or S3 (Is not possible to know which one) them i can´t do it with etable
thanks

 

[ChessFalconer]

the solution is symple: use etable data in this way:
ETABLE,S1,S,1
Etable,s2,s,2
etable,s3,s,3

SADD,S12,S1,S2,1,-1, ,
SADD,Sisochr,S12,S3,1,-1,

with this solution the problem is solved but does anybody knows if there is an ansys function to do this?.
thanks