找考题网-背景图
单项选择题

A.100ms至9s_990msB.100ms至1m_39s_990msC.1s至16m_39sD.10s至2……

西门子PLC的定时时基是1s,则其定时范围是()

A.100ms至9s_990ms
B.100ms至1m_39s_990ms
C.1s至16m_39s
D.10s至2h_46m_30s