# 13.2 On-line

**Introduction**

\[On-line] provides function to users for checking the HMI project and communication.

**Requirement**

1\) Project is compiled and .wmt file exists

2\) PC is connecting with PLC device

**Operating procedure**

1\) Click \[On-line] icon to open the online simulator

2\) The \[Online Emulator serial select tool] pop-up automatically, as following picture shows, the detailed description showed in following content.

![](https://3950998874-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2Fpi-series-user-manual%2F-LvODL4_D6mm7Wtlu6Ni%2F-LvOJmF_uBWUmWmtd898%2F0.png?generation=1575604139224296\&alt=media)

* PC link1/ PC link2/ PC link 3 correspond to HMI protocol list number;
* COM ports in the drop-list correspond to PC port.

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**Result**

1\) On-line simulator runs HMI project;

2\) HMI project is communicating with PLC device;
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✎**Note:**

1\) Most Desktop only has RS232 port, if users need to use RS485 and RS422, please use converter for them.

2\) Online simulation only work for 30 minutes.
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