PDD205A1121实验数据,ABB控制模块
产品概述-VMIVME-2540智能计数器/控制器（ICC）是一种VMEbus从I/O设计用于提供高精度数字信号的模块测量和功能生成能力VMEbus系统具有简单、一致的内存映射用户界面。以下功能是VMIVME-2540支持：测量功能事件计数频率测量周期/脉宽测量正交位置测量生成函数脉冲串/方波产生定时器/周期中断生成分频
PDD205A1121实验数据正交位置控制一旦由VMEbus主机编程VMIVME-2540 ICC执行这些功能自动地车载CPU维护数据结构在共享本地内存中，用于缓冲测量和排队控制命令。测量功能包括还由中的连续测量模式支持哪些测量是在没有主机CPU的情况下重复进行的参与。输入/输出连接通过高密度连接器位于前面板上支持差分和单端信号电平。这个测量和测量的用户数据交换界面发电模式符合ANSI/IEEE标准754-1985，用于32位浮点算法。整数模式使用2的补码有符号算术运算，并使用无符号算术。技术说明-TheVMIVME-2540 ICC由三部分组成：VMEbus从属DTB接口，为本地CPU资源，具有固件和支持逻辑的CPU，以及实现测量和控制功能。VMIVME-2540的框图ICC如图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.
