使用已使用梯形逻辑分配给信道的斜坡变量将给定值转换为给定值。斜坡由每1毫秒采取的输出步骤组成。输出%AQ值改变斜坡模式示例输出标准模式示例输出时间终输出值对应于新%AQ值图12-7。斜坡模式和标准模式下的输出行为两种输出的默认模式均为标准模式。斜坡模式和斜坡变量使用阶梯逻辑中的E2 COMMREQ设置，如下所述。每个输出通道的模式设置独立于其他通道的模式。当输出处于斜坡模式时，可以使用两种较低级别的模式来指定斜坡斜率：时间模式，用户以毫秒为单位提供总斜坡时间；步进模式，用户提供每1毫秒进行一次的%AQ计数。设置斜坡模式E2 COMMREQ用于更改输出通道的斜坡模式。这是用于更改模块输入报警限值并清除%I错误代码的相同COMMREQ。
to the given values using ramp variables which have been assigned to the channel using ladder logic. The ramp is composed of output steps taken every 1 millisecond. OUTPUT %AQ VALUE CHANGES EXAMPLE OUTPUT IN RAMP MODE EXAMPLE OUTPUT IN STANDARD MODE TIME FINAL OUTPUT VALUE CORRESPONDING TO NEW %AQ VALUE Figure 12-7. Output Behavior in Ramp Mode and in Standard Mode The default mode of both outputs is standard mode. Ramp mode and ramp variables are set using an E2 COMMREQ in ladder logic as described below. The mode of each output channel is set independent of the mode of the other channel. When an output is in ramp mode, two lower-level modes can be used to specify the ramp slope: time mode, in which the user provides the total ramp time in milliseconds, and step mode, in which the user provides the step in %AQ counts that will be taken every 1 millisecond. Setting the Ramp Mode An E2 COMMREQ is used to change the ramp mode of an output channel. This is the same COMMREQ that is used to change the input alarm limits of the module and clear the %I error code.
