140EDK77100模块备件

140EDK77100

通过平方根、多项式或其他函数块，然后是标度函数，以提供工程中的值
单位。
自动校准
输入通道电路漂移的补偿通过以下方式完成：
使用
内部度低漂移参考。此功能对正常输入通道处理是透明的。
现场校准
在正常情况下，无需进行现场校准。它是
如果超高，可在现场执行校准程序
提供稳定、已知、确的参考。现场校准数据存储在非易失性存储器中。全域
校准程序见第4节。
工厂校准数据存储在的非易失性存储区域中。如果现场校准不能提供所需的
结果，可以恢复出厂校准数据。
使用FC 217更改每个通道的增益或偏移值
和类型，它可以补偿输入信号的差异
读数。调整这些参数可以代替字段
标定请参阅FC 217规范S1。
诊断、安全和完整性检查
IMASI23模块在通电期间执行内置测试
并在复位时检查模块的操作和完整性。
诊断模式下的诊断
ASI模块在诊断模式下执行内置测试，以：
检查模块操作。这些测试包括：
•A/D内部参考检查。
•开关测试。
•看门狗定时器测试。
•CPU测试。
•定时器测试。
•ROM测试。
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诊断、安全和完整性检查
•DPRAM测试。
•NVRAM测试。
•SRAM测试。
•系统参考检查。
•配置信道参考检查。
•未配置信道参考检查。
正常运行期间的诊断
在启动期间，ASI模块验证
PROM和非易失性RAM。看门狗定时器保护
防止A/D转换器故障，该故障将停止输入扫描。监控输入电路是否存在开路。任何错误
通过I/O模块状态报告给控制器。
这些诊断检测到的某些故障可能导致：
停止I/O模块。
复位诊断
这些测试包括：
•PROM校验和验证。
•NVRAM校验和验证。
•DPRAM/SRAM验证。
•处理器指令集测试。
•定时器测试。
I/O扩展器总线通信安全
扩展器总线消息完整性由校验和维护
对每个发送和接收的消息或数据的计算
设置
开放输入检测
ASI模块识别并报告以下任何打开的输入：
通过指示这些信道上的不良质量来激活这些信道。
例外情况是-10至+10 VDC、0至10 VDC和0至
5 VDC输入。
报警和异常报告
该功能不会生成报警或异常报告
与ASI模块相关的代码。从中输入的值
在线配置
WBPEEUI240774A0 2-11
ASI模块必须馈送至标准异常报告
块有关更多信息，请参阅第6节。
在线配置
FCs 215、216和217中与
在线配置期间，可以更改ASI模块。什么时候
改变输入信道参数（FC 216），
通道将在短时间内保持后一个值，在此期间状态保持不变。此保持时间为：
基于期间更改的频道数
在线配置。
注：计划等待时间为4秒（坏情况

140EDK77100

140EDK77100

through a square root, polynomial, or other function block followed by a scaling function to provide the value in engineering
units.
Automatic Calibration
Compensation for drift of input channel circuitry is done by
periodic automatic calibration of each A/D converter using an
internal precision low-drift reference. This function is transparent to normal input channel processing.
Field Calibration
Field calibration is not necessary in normal situations. It is
possible to perform calibration procedures in the field if ultra
stable, known, precision references are available. Field calibration data is stored in nonvolatile memory. The complete field
calibration procedure is in Section 4.
Factory calibration data is stored in a unique nonvolatile memory area. If field calibration does not provide the desired
results, the factory calibration data can be restored.
Using FC 217 to change the gain or offset values per channel
and type, it can compensate for differences in input signal
readings. Tuning these parameters can take the place of a field
calibration. Refer to FC 217, specification S1.
Diagnostic, Security, and Integrity Checks
The IMASI23 module performs built-in tests during power-up
and on reset to check the operation and integrity of the module.
Diagnostics in Diagnostic Mode
The ASI module performs built-in tests in diagnostic mode to
check module operation. These tests include:
• A/D internal reference checks.
• Switch test.
• Watchdog timer test.
• CPU test.
• Timer test.
• ROM test.
2 - 10 WBPEEUI240774A0
Diagnostic, Security, and Integrity Checks
• DPRAM test.
• NVRAM test.
• SRAM test.
• System reference checks.
• Configured channel reference checks.
• Unconfigured channel reference checks.
Diagnostics During Normal Operation
During startup, the ASI module verifies the checksum of the
PROM and nonvolatile RAM. Watchdog timers safeguard
against an A/D converter failure which would halt input scanning. Input circuits are monitored for open circuits. Any errors
are reported to the controller through the I/O module status.
Certain failures detected by these diagnostics may result in
halting the I/O module.
Diagnostics on Reset
These tests include:
• PROM checksum verification.
• NVRAM checksum verification.
• DPRAM/SRAM verification.
• Processor instruction set tests.
• Timer test.
I/O Expander Bus Communication Security
Expander bus message integrity is maintained by checksum
calculations on each transmitted and received message or data
set.
Open Input Detection
The ASI module recognizes and reports any open inputs on
active channels by indicating bad quality on these channels.
The exception is for -10 to +10 VDC, 0 to 10 VDC, and 0 to
5 VDC inputs.
Alarm and Exception Reporting
No alarm or exception reports are generated by the function
codes associated with the ASI module. The values input from 
Online Configuration
WBPEEUI240774A0 2 - 11
the ASI module must be fed to a standard exception reporting
block. Refer to Section 6 for more information.
Online Configuration
All specifications in FCs 215, 216, and 217 associated with the
ASI module can be changed during online configuration. When
changes are made to the input channel parameters (FC 216),
the channel will hold the last value for a short period, the status remains unchanged during this period. This hold time is
based on the number of channels that were changed during
online configuration.
NOTE: Plan on a hold time of four seconds (worst case