HESG446624R1 DCS模块卡件
时钟状态字值值描述0未为SNTP操作配置以太网接口1以太网时钟当前锁定到网络定时器服务器2以太网时钟未锁定到网络定时服务器注意：LAN接口状态（LIS）块中的位5指示以太网模块当前是否锁定到网络上的SNTP时间服务器。逻辑应用程序可以周期性地检查该位，以确定以太网模块何时失去了与网络时间服务器的锁定。有关LIS块的详细信息，请参阅第12.6节“监控以太网接口状态位”。7.4.2.5.1启用或禁用PLC时间更新COMMREQ（5002）此COMMREQ用于启用或禁用特定以太网接口以更新CPU的TOD时钟。启用时，每当从网络上的SNTP服务器接收到时间更新消息时，以太网接口都会更新TOD时钟。如果在发出此COMMREQ命令时，以太网接口锁定到定时器服务器，则以太网PLC时间更新0=禁用PLC时间更新此字包含启用或禁用此以太网接口以更新PLC时钟的值。此字必须设置为0以禁用PLC时钟更新，设置为1以启用PLC时钟更新。所有其他值将导致COMMREQ返回故障状态。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141 7.4.2.5.3 COMMREQ状态字值下表列出了SNTP时间传输命令返回的CRS值。有关CRS主要和次要代码的讨论，请参阅《PACSystems RX7i、RX3i和RSTi EP CPU参考手册》GFK-2222中的“通信请求”一节。在执行COMMREQ之前，应用程序逻辑应将CRS字设置为0。执行COMMREQ后，应用程序逻辑应监控CRS字，以确定该命令的完成和成功。次要（十六进制）次要（十六）描述00 01成功完成。04 01成功完成。此时，以太网接口未锁定到SNTP服务器，因此CPU时钟未更新。05 01成功完成。CPU时钟已通过此以太网接口与SNTP服务器同步，因此CPU时钟不再更新。11 0C从该以太网接口读取时钟状态或层值时发生内部错误。未返回时钟状态/阶层值。12 0C启用CPU时间同步的内部错误。CPU时钟不会与此以太网接口上的SNTP服务器同步。13 0C禁用CPU时间同步的内部错误。07 0D COMMREQ数据块长度（COMMREQ字1）太短。08 0D COMMREQ命令代码（COMMREQ字7）未被识别。10 0D CPU和/或ENET固件版本不支持SNTP时间传输功能。12 0D尝试在此以太网接口上启用CPU时间同步，但已在另一个以太网接口上禁用。逻辑应用程序必须首先在原始以太网接口上禁用CPU时间同步，然后才能在另一个以太网接口上启用。13 0D尝试禁用以前未在此以太网接口上启用的CPU时间同步。14 0D COMMREQ命令数据无效。15 0D COMMREQ不允许，因为SNTP时间传输功能未配置。16 0D COMMREQ数据块长度（COMMREQ字1）太长。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142 7.4.2.6本地时间和夏令时校正以太网接口支持指定协调世界时（UTC）的偏移量，以校正本地时区和夏令时（DST）。您可以在“硬件配置”节点中指定DST开始/停止时间和与当地标准时间的偏移，以及与UTC的当地时间偏移。指定的校正
Clock Status Word Values Value Description 0 Ethernet interface is not configured for SNTP operation 1 Ethernet clock is currently locked to network timer server 2 Ethernet clock is not locked to network timer server Note: Bit 5 in the LAN interface Status (LIS) block indicates whether the Ethernet module is currently locked to an SNTP timeserver on the network. The logic application can periodically examine this bit to determine when an Ethernet module has lost its lock with a network timeserver. For details of the LIS block, refer to Section 12.6, Monitoring the Ethernet Interface Status Bits. 7.4.2.5.1 Enable or Disable PLC Time Update COMMREQ (5002) This COMMREQ is used to enable or disable a specific Ethernet interface to update the CPU’s TOD clock. When enabled, the Ethernet interface updates the TOD clock each time that a time update message is received from an SNTP server on the network. If the Ethernet interface is locked to a timer server when this COMMREQ command is issued, the Ethernet PLC time update 0 = Disable PLC time update This word contains the value to enable or disable this Ethernet interface to update the PLC clock. This word must be set to 0 to disable PLC clock updates, and set to 1 to enable PLC clock updates. All other values will cause COMMREQ to return a failure status. PACSystems™ RX3i and RSTi-EP TCP/IP Ethernet Communications User Manual Section 7 GFK-2224Y August 2019 SNTP Operation 141 7.4.2.5.3 COMMREQ Status Word Values The following table lists the CRS values returned by the SNTP Time Transfer commands. For a discussion of CRS major and minor codes, refer to the section on Communication Request in the PACSystems RX7i, RX3i and RSTi-EP CPU Reference Manual, GFK-2222. Before executing a COMMREQ, the application logic should set the CRS word to 0. After executing a COMMREQ, the application logic should monitor the CRS word to determine the completion and success of that command. Minor (Hex) Major (Hex) Description 00 01 Successful completion. 04 01 Successful completion. The Ethernet interface is not locked to an SNTP server at this time, so the CPU clock was not updated. 05 01 Successful completion. The CPU clock was already synchronized to the SNTP server via this Ethernet interface, so the CPU clock was not updated again. 11 0C Internal error reading clock status or stratum value from this Ethernet interface. The clock status/stratum values were not returned. 12 0C Internal error enabling CPU time synchronization. The CPU clock will not be synchronized to an SNTP server at this Ethernet interface. 13 0C Internal error disabling CPU time synchronization. 07 0D COMMREQ data block length (COMMREQ word 1) is too short. 08 0D COMMREQ command code (COMMREQ word 7) is not recognized. 10 0D CPU and/or ENET firmware version does not support SNTP Time Transfer feature. 12 0D Attempted to enable CPU time sync on this Ethernet interface while already enabled on another Ethernet interface. The logic application must first disable CPU time sync on the original Ethernet interface before enabling on another Ethernet interface. 13 0D Attempted to disable CPU time sync that was not previously enabled at this Ethernet interface. 14 0D Invalid COMMREQ command data. 15 0D COMMREQ not allowed because SNTP Time Transfer feature was not configured. 16 0D COMMREQ data block length (COMMREQ word 1) is too long. PACSystems™ RX3i and RSTi-EP TCP/IP Ethernet Communications User Manual Section 7 GFK-2224Y August 2019 SNTP Operation 142 7.4.2.6 Local Time and Daylight Savings Time Corrections Ethernet interfaces support the ability to specify an offset to the Coordinated Universal Time (UTC) to correct for local time zone and daylight savings time (DST). You can specify the DST start/stop times and offset from local standard time, as well as the local time offset from the UTC in the Hardware Configuration node. The specified correction
