Siemens SIMATIC S7 System Manual page 274

Online and diagnostic tools
9.7 Watch tables for monitoring the user program
To create a watch table:
1. Double-click "Add new watch table" to open a new
2. Enter the tag name to add a tag to the watch table.
The following options are available for monitoring tags:
 Monitor all: This command starts the monitoring of
 Monitor now: This command starts the monitoring of
The following options are available for modifying tags:
● "Modify to 0" sets the value of a selected address to "0".
● "Modify to 1" sets the value of a selected address to "1".
● "Modify now" immediately changes the value for the selected addresses for one scan
● "Modify with trigger" changes the values for the selected addresses.
● "Enable peripheral outputs" disables the command output disable and is available only
To monitor the tags, you must have an online connection to the CPU.
The various functions can be selected using the buttons at the top of the watch table.
Enter the tag name to monitor and select a display format from the dropdown selection. With
an online connection to the CPU, clicking the "Monitor" button displays the actual value of
the data point in the "Monitor value" field.
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watch table.
the visible tags in the active watch table.
the visible tags in the active watch table. The watch
table monitors the tags immediately and once only.
cycle.
This function does not provide feedback to indicate that the selected addresses were
actually modified. If feedback of the change is required, use the "Modify now" function.
when the CPU is in STOP mode.
S7-1200 Programmable controller
System Manual, 11/2009, A5E02486680-02