IS215VCMIH2C GE

GE IS215VPROH1B
GE IS215VPROH2B
GE IS220PAICH1A
GE IS220PAICH2A

分类: 标签:

Description

刷新RAM存储区或I/O映象区对应单元的状态。在输出刷新阶段,根据I/O映象区内对应的状态和数据刷新所有的输出锁存电路,再经输出电路驱动相应的外设,这时,才是PLC的真正输出。可见,采用PLC程序控制的过程和结果与继电器逻辑回路是有区别的,特别是涉及到梯级的次序、脉冲信号的捕捉等,与PLC的扫描原理是密切相关的。

Nortel 8668 DS1404068 Metro Ethernet Services Module
90 Day Warranty – Free Overnight Shipping!

Juniper M5 Router AC PE-1GE-SX M5BASE-AC-E RE-600-512
90 Day Warranty – Free US Shipping!

Cisco PRP-2 Performance Route Processor GSR12000
90 Day Warranty – Free Overnight Shipping!