HESG447308R0001工控自动化卡件
（Word 8）命令重试时间：Word 8指定传输命令时以太网接口在重试之间等待的时间（以毫秒为单位）。总共将尝试四次发送命令。如果在四次尝试之后（即四次重试时间值之后）没有收到响应，则COMMREQ状态字中将返回错误状态。如果命令重试指定为零，则使用默认值1秒。（字9）本地PLC-存储器类型：字9-11指定本地PLC中以太网接口将获取数据以写入远程EGD设备的位置。Word 9的有效值列在“读取PLC内存命令”的说明中。要传输的数据量由交换数据长度（字18）指定。（字10-11）本地PLC-存储器起始地址：字10和11确定本地PLC中的起始地址，数据将从该起始地址写入远程EGD交换机。输入的值是从Word 9中指定的存储器类型和模式的PLC存储器开始的32位偏移量（从1开始）。字10包含偏移量的最低有效16位；字11包含偏移量的最高有效16位。根据指定的模式，此偏移量将以位、字节或字为单位。（例如，如果字9=16，字10,11=2，0，则起始地址将为%I9。）值的有效范围取决于PLC的内存范围。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123字偏移值描述字12远程签名EGD交换签名。当不使用签名时，PLC的值应为0。如果将使用EGD的运行模式存储，强烈建议使用签名。字13远程生产商ID（最低有效字）EGD生产商ID字14远程生产商标识（最高有效字）字15远程交换ID（最低重要字）EGE交换ID字16远程交换ID字（最低有效词）字17远程交换偏移字节偏移（基于0），应在交换中读取。字18写入长度要写入的字节数，范围为0到1400字节。Word 19网络地址类型必须为1。表示将使用IP地址。对于IP地址，字20网络地址长度必须为4。不允许使用组ID（多播）。远程PLC的字21至字24 IP地址四个整数，指定为远程PLC的虚线十进制IP地址的每个字一个整数。不能是组IP地址。字25始终保留0存储器位置的进一步考虑12-25（字12）远程EGD交换–交换签名：字12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13-14）远程EGD交换–制作人ID：单词13和14包含远程EGD设备上所需交换的32位制作人ID。字13包含生产者ID的最低有效16位；字14包含最高有效16位。（字15-16）远程EGD交换–交换ID：字15和16包含远程EGD设备上所需交换的32位交换ID。字15包含交换ID的最低有效16位；字16包含最高有效的16位。对于写入EGD命令，远程设备上的交换必须是生成的交换。（字17）远程EGD交换–交换数据偏移：字17包含远程EGD设备交换数据部分中要覆盖的数据的基于0的字节偏移。
(Word 8) Command Retry Time: Word 8 specifies the time (in milliseconds) the Ethernet interface will wait between retries when transferring the command. A total of four tries will be made to send the command. If no response is received after the four tries (i.e. after four times the retry time value), an error status will be returned in the COMMREQ status word. If the command retry is specified as zero, the default value of one second is used. (Word 9) Local PLC - Memory Type: Words 9-11 specify the location in the local PLC where the Ethernet interface will get the data to write to the remote EGD device. Valid values for Word 9 are listed in the description of Read PLC Memory Command. The amount of data to be transferred is specified by the Exchange Data Length (Word 18). (Words 10 - 11) Local PLC - Memory Starting Address: Words 10 and 11 determine the starting address in the local PLC from which data is to be written to the remote EGD exchange. The value entered is the 32-bit offset (1-based) from the beginning of PLC memory for the memory type and mode specified in Word 9. Word 10 contains the least significant 16 bits of the offset; Word 11 contains the most significant 16 bits of the offset. This offset will be either in bits, bytes, or words depending on the mode specified. (For example, if Word 9=16 and Words 10,11 = 2, 0 then the starting address will be %I9.) Valid ranges of values depend on the PLC’s memory ranges. PACSystems™ RX3i and RSTi-EP TCP/IP Ethernet Communications User Manual Section 6 GFK-2224Y August 2019 Programming EGD Commands 123 Word Offset Value Description Word 12 Remote signature EGD Exchange signature. This should be 0 for PLCs when not using signatures. If run-mode store of EGD will be used, the use of signatures is highly recommended. Word 13 Remote Producer ID (least significant word) EGD Producer ID Word 14 Remote Producer ID (most significant word) Word 15 Remote Exchange ID (least significant word) EGD Exchange ID Word 16 Remote Exchange ID (least significant word) Word 17 Remote Exchange Offset Byte offset (0-based) in the exchange that should be read. Word 18 Write length Number of bytes to be written in the range 0 to 1400 bytes. Word 19 Network address type Must be 1. Indicates an IP address will be used. Word 20 Network address length Must be 4 for IP address. Group ID (multicast) is not permitted. Word 21 to Word 24 IP Address of the remote PLC Four integers, specified as one integer per word of the dotted-decimal IP address of the remote PLC. May not be a group IP address. Word 25 Reserved Always 0 Further Consideration of Memory Locations 12-25 (Word 12) Remote EGD exchange – Exchange Signature: Words 12 contains the 16-bit exchange signature value to be compared at the remote EGD device. For remote PLCs, 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 13 - 14) Remote EGD exchange – Producer ID: Words 13 and 14 contains the 32-bit Producer ID of the desired exchange at the remote EGD device. Word 13 contains the least significant 16 bits of the Producer ID; word 14 contains the most significant 16 bits. (Words 15 - 16) Remote EGD exchange – Exchange ID: Words 15 and 16 contains the 32-bit Exchange ID of the desired exchange at the remote EGD device. Word 15 contains the least significant 16 bits of the Exchange ID; word 16 contains the most significant 16 bits. For the Write EGD Command, the exchange at the remote device must be a Produced exchange. (Word 17) Remote EGD exchange – Exchange Data Offset: Word 17 contains the 0-based byte offset of the data to be overwritten in the data portion of the exchange at the remote EGD device.
