测试0通道时,用debug->commissioning观察,有计数值,用piw264进行观测也有值,但是观察db1.dbd148时,确是零,不明白为什么

A "aa"
= DB1.DBX 37.6
-------------------------------------------
A "aa"
JNB _001
CALL "CNT2_CTR"
DB_NO:=W#16#1
_001: NOP 0
----------------------------------
L 255
T DB1.DBB 23
NOP 0
--------------------------------------
L W#16#64
T DB1.DBB 2
NOP 0
-----------------------------------------
L PIW 264
T MW 10
NOP 0