HESG447024R1工控卡件
23轮询间隔仅在选择单播时可用。PAC系统™ RX3i和RSTi EP TCP/IP以太网接口的机架（高字节）和插槽（低字节）位置。对于PACSystems CPU嵌入式以太网接口，输入CPU模块的机架/插槽位置。机架插槽十六进制字值0 4 0004H 3 4 0304H 2 9 0209H 4 2 0402H TASK对于PACSystems以太网模块，任务必须设置为98（62H）。对于PACSystems CPU嵌入式以太网接口，任务必须设置为值65634（10062H），以寻址CPU的以太网子板。FT输出如果PLC CPU（而不是以太网接口）检测到COMMREQ故障，则设置FT输出。在这种情况下，此COMMREQ不更新其他状态指示器。PAC系统™ RX3i和RSTi EP TCP/IP以太网通信用户手册第7节GFK-2224Y 2019年8月SNTP操作138注意输入错误的TASK值可能会导致意外结果。7.4.2.4读取以太网时钟状态和层COMMREQ（5001）此COMMREQ用于从指定以太网接口读取时钟状态和阶层。如果为TOD时钟同步启用了多个以太网模块，则应用程序逻辑必须检查每个以太网模块的层，以确定要选择哪个以太网模块。来自锁定时间服务器（如果有）的以太网时钟状态和层值将作为两个连续的字返回。7.4.2.4.1读取以太网时钟状态和阶层COMMREQ字偏移值描述字1命令数据块长度的命令块。总是3。字2 0始终为0（等待/无等待模式请求）。字3有关存储器类型代码列表，请参阅第6.4节，EGD命令的COMMREQ状态。COMMREQ状态字的内存类型。字4 COMMREQ状态字的基于0的偏移。有关CRS字值，请参阅第141页。单词5 0始终为0。单词6 0始终为0。字7 5001读取时钟状态和阶层命令编号。字8有关存储器类型代码列表，请参阅第6.4节，EGD命令的COMMREQ状态。从以太网接口检索的时钟状态和层值的存储位置的内存类型。Word 9在Word 8中指定的内存类型内的任何有效偏移量。这是一个从1开始的数字。以太网时钟状态和层参考地址偏移PACSystems™ RX3i和RSTi EP TCP/IP以太网通信用户手册第7节GFK-2224Y 2019年8月SNTP操作139 7.4.2.4.2时钟状态和阶层格式时钟状态和层PLC存储器地址时钟状态时钟状态和层级PLC存储器地址+1时钟阶层以太网接口可一次维护多达四个SNTP服务器的定时信息。每个服务器分配一个决定其优先级的层号。当锁定到网络时间服务器时，以太网时钟层值指示服务器提供的时间值的准确性。地层值为1表示最高精度时间；值15表示最低精度。层值255表示以太网时钟未锁定到任何时间服务器。在使用该层值之前，请始终检查相应的时钟状态是否指示以太网时钟已锁定到网络时间服务器。状态字指示以太网时钟是否锁定到网络时间服务器。
23 Poll Interval is only available when Unicast is selected. PACSystems™ RX3i and RSTi-EP TCP/IP the rack (high byte) and slot (low byte) location of the Ethernet interface. For the PACSystems CPU embedded Ethernet interface, enter the rack/slot location of the CPU module. Rack Slot Hex Word Value 0 4 0004H 3 4 0304H 2 9 0209H 4 2 0402H TASK For the PACSystems Ethernet module, Task must be set to 98 (62H). For the PACSystems CPU embedded Ethernet interface, Task must be set to the value 65634 (10062H) to address the CPU’s Ethernet daughterboard. FT OUTPUT The FT output is set if the PLC CPU (rather than the Ethernet interface) detects that the COMMREQ fails. In this case, the other status indicators are not updated for this COMMREQ. PACSystems™ RX3i and RSTi-EP TCP/IP Ethernet Communications User Manual Section 7 GFK-2224Y August 2019 SNTP Operation 138 CAUTION Entering an incorrect TASK value may cause unexpected results. 7.4.2.4 Read Ethernet Clock Status and Stratum COMMREQ (5001) This COMMREQ is used to read the clock status and stratum from the specified Ethernet interface. If multiple Ethernet modules are enabled for TOD Clock Synchronization, the application logic must examine the stratum at each Ethernet module to determine which Ethernet module to select. The Ethernet clock status and stratum values from the locked time server (if any) are returned as two consecutive words. 7.4.2.4.1 Command Block for Read Ethernet Clock Status and Stratum COMMREQ Word Offset Value Description Word 1 Length of command data block. Always 3. Word 2 0 Always 0 (Wait/No Wait mode request). Word 3 For a list of memory type codes, see Section 6.4, COMMREQ Status for the EGD Commands. Memory type of the COMMREQ status word. Word 4 0-based Offset of COMMREQ status word. For CRS word values, refer to page 141. Word 5 0 Always 0. Word 6 0 Always 0. Word 7 5001 Read Clock Status and Stratum command number. Word 8 For a list of memory type codes, see Section 6.4, COMMREQ Status for the EGD Commands. Memory type of the storage location for the clock status and stratum values retrieved from the Ethernet interface. Word 9 Any valid offset within memory type specified in Word 8. This is a 1-based number. Ethernet Clock Status and Stratum reference address offset PACSystems™ RX3i and RSTi-EP TCP/IP Ethernet Communications User Manual Section 7 GFK-2224Y August 2019 SNTP Operation 139 7.4.2.4.2 Clock Status and Stratum Format Clock Status and Stratum PLC memory address Clock Status Clock Status and Stratum PLC memory address + 1 Clock Stratum An Ethernet interface can maintain timing information from up to four SNTP servers at a time. Each server assigns a stratum number that determines its priority. When locked to a network timeserver, the Ethernet clock stratum value indicates the accuracy of the time value provided by the server. A stratum value of one indicates the highest accuracy time; a value of 15 indicates the lowest accuracy. A stratum value of 255 indicates that the Ethernet clock is not locked to any timeserver. Before using this stratum value, always check that the corresponding clock status indicates that the Ethernet clock is locked to a network timeserver. The Status word indicates whether the Ethernet clock is locked to a network timeserver.
