UNS2880B-P,V1 3BHE014967R0001励磁系统模块,DCS卡件使用COMM\U REQ命令将模块ALG442上的输出设置为在斜坡模式下运行。在正常情况下工作模式下，在输出通道的%AQ参考中输入的新值会导致输出直接改变到新值。在斜坡模式下，输出在一段时间内变为新值。输出通道每当其%AQ参考中的值发生变化时，开始一个新的渐变（向上或向下）。
UNS2880B-P,V1 3BHE014967R0001励磁系统模块模块执行对新输出值进行范围检查，并在进行斜坡之前自动调整超出范围的值计算。使用COMM\U REQ命令为任一通道或两个输出通道设置斜坡模式的使用。这个斜坡坡度可以在COMM\U REQ中设置为：▪ 从1毫秒到32秒的总斜坡时间，或：▪ 1到32000个1毫秒步长的序列。通道保持在斜坡模式，直到模块接收到新的COMM\U REQ，改变或取消斜坡运行，或直到功率循环。在硬件配置后，通道不会改变模式下载由于COMM_REQ设置是临时的，因此在通电后会丢失。如果模块收到一个新的COMM\U REQ，在输出过程中改变斜坡操作斜坡，新的斜坡设置生效如下：▪ 如果在斜坡期间关闭斜坡模式，通道将直接转到其%AQ参考中的值。▪ 如果通道设置为在一段时间内斜坡，但接收到新的COMM\U REQ命令通道在一系列测量步骤中变坡，一旦处理COMM_REQ（假设步骤有效）。▪ 如果通道设置为按测量步骤序列斜坡，但收到新的COMM\U REQ命令通道在一段时间内变坡，它立即使用当前输出作为起始输出，当前时间作为起始时间。如果模块接收到无效通道、步长或斜坡时间的斜坡命令，则模块忽略命令并在其%I状态引用的第一个字节中返回错误代码。可以通过以下方式清除错误代码：清除错误COMM_REQ，或重新配置模块。
Use of Ramp mode is set up for either channel or both output channels using a COMM_REQ command. The
ramp slope can be set up in the COMM_REQ as:
▪
a total ramp time from 1 millisecond to 32 seconds, or:
▪
a sequence of 1 to 32000 1-millisecond steps.
A channel stays in Ramp mode until the module receives a new COMM_REQ either changing or canceling the
ramp operation, or until power is cycled. The channel will not change modes after a hardware configuration
download. Because COMM_REQ settings are temporary, it will be lost after a power cycle.
If the module receives a new COMM_REQ that changes ramp operation while an output is in the process of
ramping, the new ramp settings take effect as follows:
▪
If Ramp mode is turned off during a ramp, the channel goes directly to the value in its %AQ reference.
▪
If a channel is set up to ramp over a period of time, but a new COMM_REQ is received commanding the
channel to instead ramp in a sequence of measured steps, ramp operation changes as soon as the
COMM_REQ is processed (assuming that the step is valid).
▪
If a channel is set up to ramp as a sequence of measured steps, but a new COMM_REQ is received
commanding the channel to instead ramp over a period of time, it immediately starts a new ramp using the
present output as the starting output and the present time as the start time.
If the module receives a Ramp command for an invalid channel, step height or ramp time, the module ignores the
command and returns an error code in the first byte of its %I status references. The error code can be cleared by
a Clear Errors COMM_REQ, or by reconfiguring the module.
