How to Prevent a Program Update from Causing a Loss of Communication

想象一下，您有三个小时的数据记录台，距离测量数据有三个小时。为了物理到达你的车站，你不仅要开三个小时，而且你必须徒步旅行一座冰雪覆盖的山。

A couple of days ago, you made a change to your CRBasic data logger program and were unsure of the effects of the update. But you needed to make the change and proceeded to send the updated program to the data logger. Unfortunately, that was the last you heard from your station.

虽然您发现了您的数据记录器程序中的错误导致您导致通信，但您现在必须等待晴朗的一天，以便您可以让山上沿着山上纠正程序。如果您可以在不必去网站旅行的情况下再次运行，那么如果您可以再次运行，那就不容易得多？

The good news is that there is a simple solution that can prevent your program update from causing a loss of communication with your station. Within your CRBasic program, use therunprogram（）指令，并引用新程序将更换的程序名称。在下面的例子中，runprogram（）指令是引用以前的程序名为prognawerev1.cr6.。Notice that therunprogram（）instruction is placed within a conditional如果然后/结束instruction—just below a timer.

'prognawerev2'主程序beginprog扫描（1，sec，0,0）Public ChangeBackTimer ‘Declaration of variable ChangeBackTimer = Timer (10,Min,0 ) ‘Result of timer is assigned to variable If ChangeBackTimer >= 10 Then ‘Conditional statement evaluates variable RunProgram ("CPU:ProgNameRev1.cr6",4) ‘Points to another program on CPU, Set to run now. EndIfNextscan.EndProg

此代码允许您的新上传程序运行10分钟（足够的时间来测试您的通信是否受到影响）。然后它自动恢复到上一个​​程序。

If you send the new program, your data logger seems to be operating as planned, and communication is operating normally, you can proceed to comment out or delete the “ChangeBack” portions of your code. Then send the program again. Congratulations! Your station is now up and running, your data logger has resumed logging data, and you didn’t have to spend hours traveling back and forth to your station site to do it. Although therunprogram（）指令在此应用程序中有许多其他用途，它可能只是从意外行程保存。

笔记：As fantastic as this application may sound, therunprogram（）教学不是一个故障安全指令。Possible complications can arise when combiningrunprogram（）与其他指示如SetSetting()。如果您使用的是，请联系Campbell ScientificSetSetting()instruction in your program(s).

Tip:It is always a good practice to download your data frequently and keep a current backup of your data logger program and configuration file.

如果你认为的话runprogram（）instruction can help you in your application, I invite you to try it out a few times with your unique programs in your office.If you have any questions or comments about using the instruction, post them below.