HESG447271R0002 70BK03B-ES工业自动化卡件
不能是组IP地址。单词23保留始终为0。进一步考虑存储器位置12-23（字11）远程EGD交换–交换签名：字11包含要在远程EGD设备上比较的16位交换签名值。对于远程PLC，如果未使用签名，则应将交换签名设置为零。但是，如果启用了签名，则可以将签名字段设置为非零值，以便只有签名匹配时才会执行命令。在这种情况下，不匹配的签名将导致命令返回失败状态。（单词12-13）远程EGD交换–制作人ID：单词12和13包含远程EGD设备上所需交换的32位制作人ID。字12包含生产者ID的最低有效16位；字13包含最高有效16位。（单词14-15）远程EGD交换–交换ID：单词14和15包含远程EGD设备上所需交换的32位交换ID。字14包含交换ID的最低有效16位；字15包含最高有效16位。对于屏蔽写入EGD命令，远程设备上的交换必须是生成的交换。（字16）远程EGD交换–交换数据偏移：字16包含单个数据字节数据的基于0的字节偏移，该数据字节数据包含远程EGD设备交换数据部分中要覆盖的一个或多个位。（字17）远程服务器-网络地址类型：字17指定远程PLC地址的格式。单词17必须包含值1。这表示使用每个十进制数字的单独寄存器表示的虚线十进制IP地址。（字18）远程服务器-网络地址长度：字18指定此COMMREQ命令块中远程PLC IP地址的字长度。单词18必须包含4。（字19-22）远程服务器-IP地址：字19-22指定要访问的远程PLC的点十进制IP地址的四个整数，每个字一个整数。PAC系统™ RX3i和RSTi EP TCP/IP以太网通信用户手册第6节GFK-2224Y 2019年8月编程EGD命令126 6.9.1.1.1屏蔽写入EGD交换位掩码和数据位掩码命令的字9包含位掩码。字9的最高有效字节被忽略。在最低有效字节中，设置为1的任何位都将写入远程生成器。屏蔽写入命令的字10的等效位包含要写入的位状态，1或0。单词10的最高有效字节也被忽略。例如：Word 9大多数以太网通信用户手册第7节GFK-2224Y 2019年8月SNTP操作127第7节：SNTP操作本章介绍如何将PACSystems以太网接口同步到SNTP服务器，以同步网络上的计算机时钟。包括以下主题：▪ 正常SNTP操作▪ 使用多个SNTP服务器▪ SNTP服务器丢失或缺失▪ 以太网全球数据交换的时间戳7.1正常SNTP操作如果配置了SNTP，默认操作模式为广播和多播。对于单播通信模式，用户可以使用PME中的硬件配置节点（首选方法）配置必要的参数。或者，如果硬件与AUP文件兼容，用户可以配置13.3.3附录A：配置高级用户参数中定义的必要参数。7.1.1 SNTP广播和多播操作模式在150秒内收到两个广播时钟值后，以太网接口将与远程SNTP时间服务器同步。Station Manager可用于查看服务器状态信息。7.1.2 SNTP单播操作模式在此模式下，模块尝试从时间服务器请求时间以同步时钟。最多可以配置两个时间服务器：一个用于主时间服务器，另一个用于辅助时间服务器。根据配置参数，以太网模块首先轮询主时间服务器并同步时钟。如果主服务器没有响应请求，它将切换到辅助服务器并轮询更新的时间。此过程将重复，直到它与
May not be a group IP address. Word 23 Reserved Always 0. Further Consideration of Memory Locations 12-23 (Word 11) Remote EGD exchange – Exchange Signature: Words 11 contains the 16-bit exchange signature value to be compared at the remote EGD device. For remote PLC’s, the exchange signature should be set to zero if signatures are not being used. However, when signatures are enabled, the signature field can be set to a non-zero value so that commands will only be executed if signatures match. In this case, mismatched signatures will cause the command to return a failure status. (Words 12 - 13) Remote EGD exchange – Producer ID: Words 12 and 13 contains the 32-bit Producer ID of the desired exchange at the remote EGD device. Word 12 contains the least significant 16 bits of the Producer ID; word 13 contains the most significant 16 bits. (Words 14 - 15) Remote EGD exchange – Exchange ID: Words 14 and 15 contains the 32-bit Exchange ID of the desired exchange at the remote EGD device. Word 14 contains the least significant 16 bits of the Exchange ID; word 15 contains the most significant 16 bits. For the Masked Write EGD Command, the exchange at the remote device must be a Produced exchange. (Word 16) Remote EGD exchange – Exchange Data Offset: Word 16 contains the 0-based byte offset of the single data byte data containing the bit or bits to be overwritten in the data portion of the exchange at the remote EGD device. (Word 17) Remote Server - Network Address Type: Word 17 specifies the format of the remote PLC address. Word 17 must contain the value 1. This indicates a dotted-decimal IP address expressed using a separate register for each decimal digit. (Word 18) Remote Server - Network Address Length: Word 18 specifies the length in words of the remote PLC IP address in this COMMREQ Command Block. Word 18 must contain 4. (Words 19 – 22) Remote Server - IP Address: Words 19–22 specify the four integers, one integer per word, of the dotteddecimal IP address of the remote PLC to be accessed. PACSystems™ RX3i and RSTi-EP TCP/IP Ethernet Communications User Manual Section 6 GFK-2224Y August 2019 Programming EGD Commands 126 6.9.1.1.1 Masked Write to EGD Exchange Bit Mask and Data Bits Word 9 of the Masked Write command contains the bit mask. The most significant byte of Word 9 is ignored. In the least significant byte, any bits set to 1 will be written to the remote producer. The equivalent bit of Word 10 of the Masked Write command contains the bit state to be written, 1 or 0. The most significant byte of Word 10 is also ignored. For example: Word 9 Most Ethernet Communications User Manual Section 7 GFK-2224Y August 2019 SNTP Operation 127 Section 7: SNTP Operation This chapter describes how to sync PACSystems Ethernet interfaces to an SNTP server to synchronize computer clocks on a network. The following topics are covered: ▪ Normal SNTP Operation ▪ Using Multiple SNTP Servers ▪ Loss or Absence of SNTP Servers ▪ Time-Stamping of Ethernet Global Data Exchanges 7.1 Normal SNTP Operation If SNTP is configured, the default mode of operation is Broadcast and Multicast. For Unicast mode of communication, the user can configure the necessary parameters using the Hardware Configuration node in PME (preferred method). Alternatively, if hardware is compatible with AUP files, the user can configure the necessary parameters defined in 13.3.3Appendix A:, Configuring Advanced User Parameters. 7.1.1 SNTP Broadcast and Multicast Operation Mode The Ethernet interface will synchronize to a remote SNTP timeserver after receiving two broadcast clock values within a 150-second period. The Station Manager can be used to view server status information. 7.1.2 SNTP Unicast Operation Mode In this mode, the module tries to request the time from a time server to synchronize the clock. You can configure a maximum of two time-servers: One for Primary Time Server and another for Secondary Time Server. Based on the configuration parameters, the Ethernet module first polls the Primary Time Server and synchronizes the clock. If the Primary Server does not respond to the requests, it switches to the Secondary Server and polls it for updated time. This process repeats until it synchronizes to one of
