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1756-L63/B数控模块
输入范围和输出数据限制如下表所示，数据可以是原始二进制或转换后的二进制总体安排在允许的2%最大超范围裕度内，没有错误代码向PLC报告。
输入范围和输出数据限制诊断的通信诊断程序在五秒钟的初始化期间执行随后通电。诊断例程也在并发等待状态期间运行执行A/D转换。系统诊断包括：RAM检查、ROM检查、UART检查以及检查配置开关的合法性设置和监控自动校准的能力。如果模块未能通过内部诊断，将重试两次。如果其中之一成功，临时故障被视为软故障，不会报告给PC，但模块系统继续不间断处理。
如果模块出现故障诊断三次后，系统进入加电复位状态。转换设置和监视器超出范围需要仔细检查。
由于模块接收来自现场的瞬时数据，但将平均数据发送到PC，瞬时RB格式中小于0或大于4200的数据被视为超出范围。
这样的数据将被强制（钳制）为0000（小于范围），4200（大于范围）价值观但是，如果条件存在的时间少于总平均时间。在这种情况下，该格式表示平均值超出范围。其平均值为固定值；
平均值可能超出范围，也可能不超出范围
红色OUT-OF-RANGE（超出范围）灯将只要平均值中包含超出范围的数据样本，则保持ON。
双列直插式组件开关银行A高速模拟输入模块可以设置为五个输入电压中的任何一个或DIP开关的电流范围。您还可以从七个时段中进行选择数字滤波；允许瞬时电压样本成为移动平均线的一部分。DIP开关还将模块设置为4或8电路模式和二进制或十进制输出。
为了便于讨论，我们将指定上列DIP开关组A（DIP SwA）和下列B（DIP Sw-B）。
这些交换机通过位于模块后部。
下图显示了从模块后部看到的下倾开关-A。蘸Sw-A用于选择输入范围。
Dip Switch Bank A-Normal Operation SW-A（双列直插式开关组A-正常操作SW-A）设置分别适用于8和4输入配置的所有输入范围，如下表所示。除输入范围外，SW-A还有两个功能
背景开关A7对于8路配置为ON，对于4路配置为OFF开关A8必须接通才能正常工作
Input Ranges and Output Data Limits
As shown in the following table, data can be in either raw binary or converted binary format. Within the 2% maximum over-range margin allowed, no error code is reported to the PLC. Input Ranges and Output Data limits Diagnostic Communications Diagnostic procedures are executed during the five second initialization period following power--up. Diagnostic routines are also run during wait states concurrent with executing A/D conversions. System diagnostics are: RAM checks, ROM checks, UART checks, as well as checking the legality of configuration switch settings and monitoring the ability to autocalibrate. If the module fails to pass an internal diagnostic, two retries are made. If either one succeeds, the temporary failure is considered a soft failure and is not reported to the PC but the module system continues processing uninterrupted. If the module fails the diagnostic three times, the system goes into a power--up reset condition. switch settings and monitor Out--of--Range requires careful examination. Since the module receives instantaneous data from the field but sends averaged data to the PC, instantaneous data less than 0 or greater than 4200 in RB format is considered out-of-range. Such data will be forced (clamped) to 0000 for under--range and 4200 for over-range values. However, the averaged data will not necessarily be out-of-range if the condition existed for less time than the total averaging period. In this case, the format indicates at least one of the instantaneous data samples in the average is out of range. Its value for averaging purposes is the clamped value; the average may or may not be out of range. The red OUT-OF-RANGE light will remain ON as long as an out-of-range data sample is included in the average.
Dip Switch Bank A
The high speed analog input module can be set for any of the five input voltage or current ranges by means of DIP switches. You can also select from seven periods of digital filtering; a feature which allows an instantaneous voltage sample to become part of a moving average. The DIP switches also set the module for 4 or 8 circuit mode and binary or decimal output. For discussion purposes, we will designate the upper DIP switch bank, A (DIP SwA) and lower bank, B (DIP Sw-B). These switches are accessed through ports at the rear of the module. The following illustration shows DIP Sw-A as seen from the rear of the module. Dip Sw-A is used for selecting an input range. Dip Switch Bank A-Normal Operation SW-A settings for all input ranges for both 8 and 4 input configurations, respectively, are shown in the following tables. SW-A has two functions in addition to input range setting Switch A7 is ON for an 8-circuit configuration and OFF for a 4-circuit configuration Switch A8 must be ON for normal operation
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