HIEE300725R1 UAC317AEV1工业自动化卡件
16.23.7.2重置命令重置命令对地址字段中定义的LG1237通道进行寻址。此命令不会生成任何错误。要重置所有LG1237传感器，向全局地址15发出重置命令。16.23.7.3命令输入数据当LG1237接收到来自压力传感器模块的命令时，它返回一个命令响应，该命令响应从命令输入数据参考地址开始写入命令输入数据引用存储器。字节偏移图419:RJ-45引脚PRS015 7终端2 6 Rx-（输入）5 GND 4 3 Rx+（输入）2 Tx-（输出）1 Tx+（输出）注意：端口连接器上没有屏蔽或框架接地引脚。为了降低对噪声的敏感性，RX+和RX-信号应连接到同一双绞线。同样，TX+和TX-信号应连接到单个双绞线。16.23.8.2终止默认情况下，每个端口都设置为不终止。如果模块是RS-485网络上的第一个或最后一个设备，即使网络上只有一个其他设备，也需要终止。可以使用下图所示的外部电阻器或端口内置的120W终端电阻器提供终端。如果需要120W以外的线路终端，则必须提供适当的外部电阻器。16.23.8.1用户提供的RS-485终端6 3端接电阻器全双工4线RS-485图420：外部安装的端接电阻器16.23.8.2可通过设置适当的RS-485端接跳线，或通过在连接至PACSystems*RX3i系统手册第16节GFK-2314T 2019年9月专用模块819Ö要在内部设置120 W终端1）通过按压侧片并将面板从模块上拉开，卸下模块的面板。2） 如图所示定向模块时，移动全双工的上跳线或下跳线，半双工的4线默认（上）位置跳线，移除面板的模块前部2线默认（下）位置跳线端口连接器侧向下移动顶部跳线或连接端口引脚7和3底部跳线，不使用全双工四线RS-485内部120欧姆终端，默认跳线位置图421：使用内部终端电阻器PRS015 PACSystems*RX3i系统手册附录专用模块821第17节：接线板和互连电缆本章介绍了以下内容：·高密度模块安装接线板（第17.1节）·用于RX3i和90-30系列的接线板快速连接（TBQC）系统（第17.2节）RX3i和90-30系列32点分立模块的20端子分立模块o，带有双D连接器o，RX3i与90-30系列模块的36端子·适用于将I/o模块连接到远程TBQC接线板的预制互连电缆·如何构建定制互连电缆。·接线板选择选项除非另有说明，RX3i I/O模块均配有适当的接线板。请参阅本手册中讨论感兴趣的特定I/O模块的章节。在高密度离散I/O模块的情况下，用户有一些接线板选择选项，因此接线板是单独购买的。用户可以选择：·安装在模块上的接线板，在这种情况下，所有现场接线将直接连接到I/O模块上·带有互连电缆的插入式接线板，允许所有现场接线连接到插入式接线条上，然后通过预制或定制电缆连接到I/O模件上。这允许将I/O模块快速连接到先前接线的接线板。它还提供了一种解决方案，其中由于空间限制或由于线束的刚性或厚度，直接连接到I/O模块是不可能的。
16.23.7.2 Reset Command The Reset command addresses the LG1237 channel defined in the Address field. No errors are generated for this command. To reset all LG1237 transducers, issue the Reset command to the global address, 15. 16.23.7.3 Command Input Data When the LG1237 receives a command from the Pressure Transducer module, it returns a command response, which is written to the Command Input Data Reference memory, starting at the Command Input Data Reference Address. Byte Offsets Figure 419: RJ-45 Pinout PRS015 7 Termination 2 6 Rx- (Input) 5 GND 4 3 Rx+ (Input) 2 Tx- (Output) 1 Tx+ (Output) Note: There is no shield or frame ground pin on the port connector. To reduce susceptibility to noise, the RX+ and RX- signals should be wired to the same twisted pair. Likewise, the TX+ and TX- signals should be wired to a single twisted pair. 16.23.8.2 Termination By default, each port is set for no termination. Termination is needed if the module is the first or last device on an RS-485 network, even if there is only one other device on the network. Termination can be provided using either an external resistor as displayed in the following figure or the 120W termination resistor built into the port. If line termination other than 120W is required, an appropriate external resistor must be supplied. 16.23.8.2.1 User-Supplied Termination for RS-485 6 3 Terminating Resistor Full Duplex 4-Wire RS-485 Figure 420: Externally-Mounted Terminating Resistor 16.23.8.2.2 Built-in Termination for RS-485 Termination using the built-in 120W resistor can be provided by setting the appropriate RS-485 termination jumper OR by installing shorting jumpers on the RS-485 cable connector that attaches to the serial port. PACSystems* RX3i System Manual Section 16 GFK-2314T Sept. 2019 Special Purpose Modules 819 Ø To set 120 W termination internally 1) Remove the faceplate of the module by pressing in on the side tabs and pulling the faceplate away from the module. 2) With the module oriented as shown, move either the upper or lower jumper Jumper for Full Duplex, 4 Wire in Default (Upper) Position Jumper for Half Duplex, 2-Wire in Default (Upper) Position Front of Module with Faceplate Removed Side of Port Connector Move top jumper down or connect Port pins 7 and 3 Bottom jumper not used Full Duplex Four-Wire RS-485 Internal 120-Ohm Termination, Default Jumper Positions Figure 421: Using the Internal Terminating Resistor PRS015 PACSystems* RX3i System Manual Appendix Special Purpose Modules 821 Section 17: Terminal Blocks and Interconnect Cables This chapter describes the following: · High-Density Module-Mounted Terminal Blocks (Section 17.1) · Terminal Block Quick Connect (TBQC) system (Section 17.2) o for RX3i and Series 90-30 20-terminal discrete modules o for RX3i and Series 90-30 32-point discrete modules with dual D-Connectors o for RX3i and Series 90-30 Modules with 36 terminals · Pre-fabricated interconnect cable suitable for connecting the I/O Modules to the Remote TBQC terminal blocks · How to build a custom interconnect cable. · Terminal Block Selection Options Unless otherwise stated, RX3i I/O modules are provided with a suitable terminal block. Refer to the section in this manual which discusses the specific I/O module of interest. In the case of high-density discrete I/O modules, the user has some terminal block selection options, so terminal blocks are purchased separately. The user may select: · A module-mounted terminal block, in which case all field wiring will be directly attached to the I/O module · An interposing terminal strip with an interconnect cable, allowing all field wiring to be landed on the interposing terminal strip, which is then attached to the I/O module via a pre-fabricated or custom cable. This allows for quick connection of the I/O module to previously wired terminal strips. It also provides a solution where wiring directly to the I/O module is not possible due to space limitations or due to the rigidity or thickness of the wire bundle.
