HITACHI LCE250A数字量输入卡件
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FF H1总线允许重新使用现有的4-20 mA模拟信号布线。这意味着电缆往往成为主要的尺寸因素。FF配置工具可以直接连接到FF H1总线。HITACHI LCE250A已被CI860通信接口（以及LD800HSE链接设备）所取代。HITACHI LCE250A仅出于遗留原因进行描述。指示器HITACHI LCE250A基金会现场总线H1接口具有以下LED指示器。技术数据表78。HITACHI LCE250A基金会现场总线H1–检测到LED指示指示/颜色功能F（故障）/红色单元错误。由控制软件控制。在控制器重置期间由硬件设置并清除。R（un）/绿色运行。由控制软件控制。在控制器重置过程中被硬件清除。Rx/Tx/黄色传输到装置或从装置传输。表79。HITACHI LCE250A基金会现场总线H1接口规范项目描述类型-基金会现场现场总线H1主控和链接时间表。-注意，完整的控制器具有基金会现场总线连接设备所需的硬件功能。通道数量单通道基金会现场总线H1（31.25 kbit/s）。协议基金会现场总线H1通过HITACHI LCE250A上的端口。通信速度31.25 kbit/s（FF H1）允许节点地址20–247通过变压器进行电流隔离。
The FF H1 bus allows reuse of existing cabling for 4-20 mA analog signals. This means the cables often become the dominant dimensioning factor. An FF configuration tool can be connected directly to the FF H1 bus. HITACHI LCE250A has been replaced by the CI860 communication interface (together with the LD800HSE linking device). CHITACHI LCE250Ais only described for legacy reasons.Indicators The CHITACHI LCE250AFOUNDATION Fieldbus H1 interface has the following LED indicators. Technical Data Table 78. CHITACHI LCE250AFOUNDATION Fieldbus H1 – LED Indications Indication/Color Function F(ault) /Red Unit error detected. Controlled by Control Software. Set and cleared by the Hardware during controller Reset. R(un) /Green Operating. Controlled by the Control Software. Cleared by the Hardware during controller Reset. Rx/Tx /Yellow Transmission to or from the unit. Table 79. CHITACHI LCE250AFOUNDATION Fieldbus H1 Interface Specifications Item Description Type – FOUNDATION Fieldbus H1 master and link schedule. – Note the complete controller has a HW capability necessary for a FOUNDATION Fieldbus linking device. Number of channels Single channel FOUNDATION Fieldbus H1 (31.25 kbit/s). Protocols FOUNDATION Fieldbus H1 via port on CHITACHI LCE250A Communication speed 31.25 kbit/s (FF H1) Allowed node address 20 – 247 Galvanic isolation By means of transformer.
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