When forestage dcs system or pid regulator happened fault , manipulator receiving failure signal immediately switch into manual control state , by keystroke controls operation signal output 可分别带有一路pid控制输出及一路变送输出。具有多种曲线控制输出功能：可实现曲线控制暂停清零步进等。
2.
4 . feedback or measuring signal transmit output ma v pvout pvout output signal transmit output to forestage regulator or dcs system , makes system can monitor actual valve position or field measured value at any moment 后者将数字仪表与模拟仪表集一体，同时对测量值及调节控制目标值或输出量进行相对模拟量比例显示，使参数显示更为清晰直观。
3.
Based on the current signal from the proceeding stage , the first order - modulator designed could be simplified in the precondition of performance satisfaction , and it is good in accomplishing signal conversion and could be incorporated with the forestage bandgap circuit 根据前级温度传感电路的电流信号,在满足性能要求的前提下尽量简化电路,设计出的一阶-调制电路不但很好地完成了信号转换,而且更符合一体化结构的要求。
