C output refreshperiod When the scan after the end of user program, PLC enters the output refresh phase.
当扫描用户程序结束后，PLC就进入输出刷新阶段。
2
In addition, you can set an interval offset, which further randomizes the refreshperiod to any value between 0 and 1,440 minutes (24 hours).
而且，你可以设置一个时间间隔偏差，其取值为0到1,440分钟(24小时)，可使刷新周期更随机。
3
If no message exists, the operation does not wait around for one; it simply prepares another refresh Response with a new refresh interval period and returns that back to the caller.