Watch Tables - Siemens SIMATIC S7-1200 System Manual

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Watch tables

The Web server allows you to access watch tables that you have configured in STEP 7 and

which you have downloaded to the CPU. Watch tables with 50 or fewer entries offer the best

performance in the Web server.

STEP 7 configuration to select watch tables for the Web server

From the Device Configuration of the CPU in STEP 7, you can add the watch tables that you

want the Web server to be able to display. For each watch table that you select from the list

of existing watch tables, you select Read or Read/Write privileges for it. When downloaded

to the CPU, you can only view the watch tables that have the Read privilege but you can

view and modify watch table tags when you select the Read/Write privilege.

After you complete the watch table configuration in the Web server section of the device

configuration, download your hardware configuration to the CPU.

Viewing watch tables from the Web server

From the Web server, if you have the "read tags" privilege (Page 1005) you can select

"Watch tables" from the navigation menu to access the watch tables that you have

configured and downloaded to the CPU. If you have downloaded more than one watch table,

you can select the one you want to display from the drop-down list. The Web server displays

the watch table that you created in STEP 7 and the current values according to the display

format. You can change the display format if you choose, but when you return to the watch

table page the Web server defaults to the display formats in the STEP 7 watch table.

S7-1200 Programmable controller

System Manual, V4.2, 09/2016, A5E02486680-AK

12.6 Standard Web pages