请教高手，OUTRES关于FREQ的设置

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小弟做了一个冲击荷载的模拟，提取一点的加速度响应，想把时程曲线的时间坐标最小刻度调为0.001，程序默认的是0.4左右，请教FREQ该怎么设置呢，有4个荷载步
具体程序如下
! L=0.6
! b=0.05
! h=0.006
!1.创建模型
FINISH$/CLEAR$/PREP7
ET,1,BEAM3
MP,EX,1,2.1E11
MP,PRXY,1,0.3
MP,DENS,1,7850
R,1,0.0003,9.0E-10,0.006
K,1
K,2,0.6
L,1,2
LESIZE,ALL, , ,12
LMESH,ALL
DK,1,ALL
FINISH
！2.瞬态分析
/SOLU$ANTYPE,TRANS
TRNOPT,FULL
OUTRES,ALL,ALL
ALPHAD,0.4436
!第一荷载步
TIMINT,OFF
TIME,1
F,2,FY,0
LSWRITE,1
！第二荷载步
TIMINT,ON
AUTOTS,ON
DELTIM,0.0001
TIME,1.0005
KBC,0
F,2,FY,-1000
LSWRITE,2
！第三荷载步
TIME,1.001
KBC,0
F,2,FY,0
LSWRITE,3
! 第四个荷载步
TIMINT,OFF
TIME,3
F,2,FY,0
LSWRITE,4
！求解
LSSOLVE,1,4
FINISH
!3.时程后处理
/POST26
! 绘制加速度传感器处的位移时程曲线
NSOL,2,5,U,Y
/GRID,1$PLVAR,2
DERIV,3,2,1, ,VCEN$DERIV,4,3,1, ,ACEN
PLVAR,3$PLVAR,4
!4.通用后处理
/POST1$SET,LIST$PLDISP
ANTIME,30,0.5, ,1,2,0,6