AB1756-OF8A模拟量输出模块

AB1756-OF8A模拟量输出模块

AB1756-OF8A模拟量输出模块

模拟量输出模块是指驱动硬件输出和相关数据通路，按照运行方式选择当前的设定值，也可根据需要反向并提供结果给硬件输出或软件输出。

模拟量输出模块可以设置为CAS_IN和RCAS_IN自动方式。SP经选择器（SPSELECTOR）对CASIN、SPLOCAL（本机设定）和RCASIN以及反馈值进行选择后输出设定值。为避免设定值SP的剧烈变化设置了限制器（rate limiter)，对SP进行速率限制，再经限位器（clamper）对SP进行绝对值限制后，进入一个按特殊功能做的特性补偿器（characterization）。

特性补偿后，SP与偏置值相加后分三路：第一路返回SP选择器；第二路进入反向通路输出参数选择器；第三路在转换器中将工程单位转换为百分数，标度参数为PVSCALE（SP%），也可通过开关（INCCLOSE）输出反向

AB1756-OF8A模拟量输出模块

The analog output module is to drive the hardware output and related data path, select the current set value according to the operation mode, and also reverse and provide the result to the hardware output or software output as required.

The analog output module can be set to CAS_IN and RCAS_IN automatic mode. SP outputs the set value after selecting the CASIN, SPLOCAL (local setting) and RCASIN and the feedback value by the SPSELECTOR. In order to avoid drastic changes in the set value SP, a rate limiter would be set, the rate of SP would be limited, and then the absolute value of SP would be limited by a clamper, and then a characterization compensator would be made according to special functions.

After the characteristic compensation, SP and the bias value are added into three ways: the first way returns the SP selector; The second path enters the reverse path output parameter selector; The third way converts engineering units to percentages in the converter, the scale parameter is PVSCALE (SP%), and can also be reversed through the switch (INCCLOSE) output