和ALARM HI（报警高）数据字段允许您输入导致报警指示传递到PLC的值。每个通道都有一个下限报警值（报警低）和一个上限报警值（警报高）。这些报警值导致%I点设置，如第3-95页和第3-96页的表格所示。可以在所有上限和下限字段中输入值。不带符号输入的值假定为正值。允许值如下表所示。范围可能的限值0至20 mA 0…32760 4至20 mA O…32760 40至20 mA增强型–8000…32760 0至10V 0…3276–10至+10V–32768…32760 12 12-18系列90–30 PLC I/O模块规格–2000年7月GFK–0898F IC693ALG442斜坡模式操作斜坡模式操作代表模块输出的单独模式。当输出通道不处于斜坡模式时，在相应的%AQ参考中输入的新值会使输出逐步达到命令值，如图3-52所示。当输出通道处于斜坡模式时，在相应的%AQ参考中输入的新值会导致输出斜坡
and ALARM HI data fields allow you to enter values that cause alarm indications to be passed to the PLC. Each channel has a low limit alarm value (ALARM LO) and a high limit alarm value (ALARM HI). These alarm values cause %I points to be set as indicated in the tables on page 3-95 and 3-96. Values can be entered in all high and low limit fields. Values entered without a sign are assumed to be positive. The allowable values are shown in the following table. RANGE Possible limit values 0 to 20 mA 0...32760 4 to 20 mA 0...32760 4 to 20 mA Enhanced –8000...32760 0 to 10V 0...32760 –10 to +10V –32768...32760 12 12-18 Series 90–30 PLC I/O Module Specifications – July 2000 GFK–0898F IC693ALG442 Ramp Mode Operation The ramp mode operation represents a separate mode of the module’s outputs. When an output channel is not in ramp mode, new values entered in the corresponding %AQ reference cause the output to step to the commanded values as shown in Figure 3-52. When an output channel is in ramp mode, new values entered in the corresponding %AQ reference cause the output to ramp
