PDD205A1121實(shí)驗(yàn)數(shù)據(jù),ABB控制模塊
產(chǎn)品概述-VMIVME-2540智能計(jì)數(shù)器/控制器（ICC）是一種VMEbus從I/O設(shè)計(jì)用于提供高精度數(shù)字信號的模塊測量和功能生成能力VMEbus系統(tǒng)具有簡單、一致的內(nèi)存映射用戶界面。以下功能是VMIVME-2540支持：測量功能事件計(jì)數(shù)頻率測量周期/脈寬測量正交位置測量生成函數(shù)脈沖串/方波產(chǎn)生定時(shí)器/周期中斷生成分頻
PDD205A1121實(shí)驗(yàn)數(shù)據(jù)正交位置控制一旦由VMEbus主機(jī)編程VMIVME-2540 ICC執(zhí)行這些功能自動(dòng)地車載CPU維護(hù)數(shù)據(jù)結(jié)構(gòu)在共享本地內(nèi)存中，用于緩沖測量和排隊(duì)控制命令。測量功能包括還由中的連續(xù)測量模式支持哪些測量是在沒有主機(jī)CPU的情況下重復(fù)進(jìn)行的參與。輸入/輸出連接通過高密度連接器位于前面板上支持差分和單端信號電平。這個(gè)測量和測量的用戶數(shù)據(jù)交換界面發(fā)電模式符合ANSI/IEEE標(biāo)準(zhǔn)754-1985，用于32位浮點(diǎn)算法。整數(shù)模式使用2的補(bǔ)碼有符號算術(shù)運(yùn)算，并使用無符號算術(shù)。技術(shù)說明-TheVMIVME-2540 ICC由三部分組成：VMEbus從屬DTB接口，為本地CPU資源，具有固件和支持邏輯的CPU，以及實(shí)現(xiàn)測量和控制功能。VMIVME-2540的框圖ICC如圖1所示。
PRODUCT OVERVIEW — The VMIVME-2540
Intelligent Counter/Controller (ICC) is a VMEbus slave I/O
module designed to provide high-precision digital
measurement and function generation capability for
VMEbus systems with a simple, consistent
memory-mapped user interface. The following functions are
supported by the VMIVME-2540:
Measurement Functions
Event counting
Frequency measurement
Period/pulse-width measurement
Quadrature position measurement
Generation Functions
Pulse train/square wave generation
Timer/periodic interrupt generation
Frequency division
Quadrature position controlOnce programmed by the VMEbus host, the
VMIVME-2540 ICC performs these functions
automatically. The on-board CPU maintains data structures
in shared local memory for buffering measurements and
queueing control commands. Measurement functions are
also supported by a Continuous Measurement Mode in
which measurements are made repeatedly without host CPU
involvement. I/O connections are routed through
high-density connectors located on the front panel with
support for differential and single-ended signal levels. The
user data exchange interface for measurement and
generation modes complies with ANSI/IEEE Standard
754-1985 for 32-bit floating-point arithmetic. Integer modes
operate with two’s complement signed arithmetic and with
unsigned arithmetic.
TECHNICAL DESCRIPTION — The
VMIVME-2540 ICC is comprised of three sections: the
VMEbus slave DTB interface which arbitrates for the local
CPU resources, the CPU with firmware and support logic,
and the circuitry which implements the measurement and
control functions. The block diagram of the VMIVME-2540
ICC is shown in Figure 1.
