Siemens S7-200PLC Manual de usuario descargar pdf (Pagina 15)

Step 4. Monitoring tags

Chapter 6.

6. Step 4. Monitoring tags

1. Go to the View I/O page from the Main Menu to check tag values and status.

2. You can change the value of tags that are configured as read/write unless the box Force Read

Only was ticked in the tag creation wizard. To change the value edit the New Value field and click

on the Update link as shown below.

Note: Clicking this Update link sets the new value in the register of the PLC. The value will

actually be returned with the next poll. In addition, you need to instruct your browser to refresh the

value shown on the screen by clicking the Update link.

Tags in error appear with a red icon as shown below:

Please refer to § 7 Troubleshooting tags in error if this appears.

Polling Data Registers from Siemens S7-200 PLC Series (How to) Page 15/21

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Siemens S7-200PLC Manual de usuario Pagina 15