產(chǎn)品標(biāo)題: DCS模塊KJ3222X1-BA1PLC控制器DCS備件

型號：KJ3222X1-BA1PLC

品牌：艾默生

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?產(chǎn)品詳情資料：

如果VMEbus從屬映射解碼器被禁用并遵循以下程序，則可以對其進行編程，而無需獲得VMEbus主控權(quán)。應(yīng)首先對地址轉(zhuǎn)換寄存器、起始和結(jié)束地址寄存器進行編程，然后通過對地址修改器選擇寄存器進行編程來啟用映射解碼器。VMEbus到本地總線接口允許非車載VMEbus主機訪問本地車載資源。從VMEbus看到的本地資源的地址由VMEbus從屬映射解碼器控制，VMEbus從映射解碼器是VMEbus到本地總線接口的一部分。VMEcchip2中的兩個VMEbus從屬映射解碼器允許將VMEbus的兩個段映射到本地總線。段的大小可以從64KB到4GB不等，增量為64KB。地址轉(zhuǎn)換由地址轉(zhuǎn)換寄存器提供，地址轉(zhuǎn)換寄存器允許由地址轉(zhuǎn)換地址寄存器而不是VMEbus的高16位提供本地總線地址的高16比特。

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??產(chǎn)品英文詳情料:

The VMEbus slave map decoders can be programmed, without obtaining VMEbus mastership, if they are disabled and the following procedure is followed. The address translation registers, starting and ending address registers should be programmed first, and then the map decoders should be enabled by programming the address modifier select registers. The VMEbus to local bus interface allows offboard VMEbus masters access to local onboard resources. The address of the local resources as viewed from the VMEbus is controlled by the VMEbus slave map decoders, which are part of the VMEbus to local bus interface. Two VMEbus slave map decoders in the VMEchip2 allow two segments of the VMEbus to be mapped to the local bus. A segment may vary in size from 64KB to 4GB in increments of 64KB. Address translation is provided by the address translation registers which allow the upper 16 bits of the local bus address to be provided by the address translation address register rather than the upper 16 bits of the VMEbus.