FB99 程序，看不太懂，做什么用的？请解释下？谢谢
Segment 1 of 1 Lib
名称 :SCANTIME
Decl :CNT I/Q/D/B/T/C: C
Decl :TIM I/Q/D/B/T/C: T
Decl :MEM I/Q/D/B/T/C: I BI/BY/W/D: BI
Decl :SCTM I/Q/D/B/T/C: Q BI/BY/W/D: W
Decl :MAX I/Q/D/B/T/C: Q BI/BY/W/D: W
:A =MEM
:RB =MEM
:AN =CNT
:L KC 0099
:SEC =CNT
:A =MEM
:SFD =CNT
:AN =MEM
:SFD =CNT
:A =CNT
:L KT 0999.1
:SEC =TIM
:BEC
:L KF 999
:L =TIM
:-F
:T =SCTM
:L =SCTM
:L =MAX
: :JC =M001
:L =SCTM
:T =MAX
M001 :BE