HE693ASC900自动化卡件
信道错误位和详细信道状态位指示非致命超时错误。即使发生超时，传输仍然可以完成。因此，应用程序可以选择发生这种情况时要做什么。如果超时值指定为零，则不会报告超时错误。对于大多数应用程序，不需要超时，因为发送周期充当超时。（单词12应为零表示无超时。）但是，有两种情况下建议超时：▪ 如果时间单位数（字11）为零，则在上一次传输完成后立即发出后续传输，并且不会报告周期错误。在这种情况下，可以指定超时值，以便通道错误位报告超时错误。▪ 如果发送周期很长（分钟或小时）。在这种情况下，可以指定一个较短的超时值，这样应用程序就不必等待发送周期到期后再执行操作。（单词13）本地PLC-内存类型：单词13–14指定本地PLC中以太网接口将获取要写入远程SRTP服务器的数据的位置。“建立读取通道”列出了单词13的有效值。（字14）本地PLC-存储器起始地址：字14确定本地PLC中发送数据的起始地址。输入的值是从字13中指定的存储器类型和模式的PLC存储器开始的偏移量（从1开始）。此偏移量可以是位、字节或字，具体取决于指定的模式（例如，如果字13=16，字14=2，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，其中存储单元的大小是字13中指定的位、字节或字。例如，如果字13＝16，字15＝4，则%I内存的4字节（32位）将被传输。最多可以指定16384位、2048字节或1024个字的数据。（单词16）保留：单词16是保留的，应包含值零。（单词17）保留：单词17是保留的，应包含值零。（单词18）远程主机-网络地址类型：单词18指定远程主机地址的格式。字18必须包含值1，该值表示使用每个十进制数字的单独寄存器表示的点划线十进制IP地址。（单词19）远程主机-网络地址长度：单词19指定远程主机IP地址的长度（以单词为单位）。单词19必须包含4。（字20-23）远程主机-IP地址：字20-23指定要访问的远程主机的十进制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8节GFK-2224Y 2019年8月编程SRTP信道命令160 8.3.5中止信道（2001）中止信道命令立即断开活动信道与其远程PLC的连接，并关闭信道。信道传输位、信道错误位和信道的详细信道状态字设置为零。8.3.5.1示例命令块仅中止PLC CPU和本地以太网接口。对于这些命令，实际功能在以太网接口内本地执行，然后COMMREQ状态字立即发送到CPU。内存位置1-8（字7）通道命令号的其他注意事项：此命令参数请求中止通道。如果命令处理成功，则在COMMREQ状态字中指示成功的时间之前终止信道上的处理。（字8）通道编号：通道编号指定要断开的通道（1–32）。作为中止所有信道的便捷方式，如果信道号参数为–1（FFFFH），则中止所有正在使用的信道。如果没有正在使用的通道，则中止所有通道不是错误。
the Channel Error bit and Detailed Channel Status bits to indicate a non-fatal timeout error. The transfer can still complete even after a timeout occurs. As a result, an application can choose what to do if one occurs. If the timeout value is specified as zero, no timeout errors will be reported. For most applications, a timeout is not needed because the send period acts as a timeout. (Word 12 should be zero for no timeout.) However, there are two circumstances where a timeout is recommended: ▪ If number of time units (Word 11) is zero, so that a subsequent transfer is issued as soon as the previous transfer completes and no period errors are reported. In this case, a timeout value can be specified so that the Channel Error bit will report timeout errors. ▪ If the send period is very long (minutes or hours). In this case, a shorter timeout value can be specified so the application doesn’t have to wait for the send period to expire before acting. (Word 13) Local PLC - Memory Type: Words 13–14 specify the location in the local PLC where the Ethernet interface will get the data to be written to the remote SRTP server. Valid values for Word 13 are listed for Establish Read Channel. (Word 14) Local PLC - Memory Starting Address: Word 14 determines the starting address in the local PLC from which the data is to be sent. The value entered is the offset (1-based) from the beginning of PLC memory for the memory type and mode specified in Word 13. This offset can be in bits, bytes, or words depending on the mode specified (for example, if Word 13=16 and Word 14=2, the starting address will be %I9). Valid ranges of values depend on the PLC’s memory ranges. PACSystems™ RX3i and RSTi-EP to be transferred, where the size of a memory unit is a bit, byte, or word as specified in Word 13. For example, if Word 13=16 and Word 15=4, then 4 bytes (32 bits) of %I memory will be transferred. A maximum of 16384 bits, 2048 bytes, or 1024 words of data can be specified. (Word 16) Reserved: Word 16 is reserved and should contain the value zero. (Word 17) Reserved: Word 17 is reserved and should contain the value zero. (Word 18) Remote Host - Network Address Type: Word 18 specifies the format of the remote host’s address. Word 18 must contain the value 1, which indicates a dotted-decimal IP address expressed using a separate register for each decimal digit. (Word 19) Remote Host - Network Address Length: Word 19 specifies the length in words of the remote host’s IP address. Word 19 must contain 4. (Words 20–23) Remote Host - IP Address: Words 20–23 specify the four integers, one integer per word, of the dotted-decimal IP address of the remote host to be accessed. PACSystems™ RX3i and RSTi-EP TCP/IP Ethernet Communications User Manual Section 8 GFK-2224Y August 2019 Programming SRTP Channel Commands 160 8.3.5 Abort Channel (2001) The Abort Channel command immediately disconnects an active channel from its remote PLC, and closes the channel. The Channel Transfer bit, the Channel Error bit, and the Detailed Channel Status words for the channel are set to zero. 8.3.5.1 Example Command Block Abort ient PLC CPU and the local Ethernet interface only. For these commands, the actual function is performed locally within the Ethernet interface and then the COMMREQ Status word is sent immediately to the CPU. Further Considerations for Memory Locations 1-8 (Word 7) Channel Command Number: This command parameter requests that a channel be aborted. If the command is processed successfully, it terminates processing on the channel by the time success is indicated in the COMMREQ status word. (Word 8) Channel Number: The channel number specifies the channel to be disconnected (1–32 ). As a convenient way to abort all channels, if the channel number parameter is –1 (FFFFH), all channels in use are aborted. It is not an error to abort all channels if there are none in use.
