Siemens SIMATIC S7-1500 System Manual page 227

Testing with watch tables
The following functions are available in the watch table:
● Monitoring of tags
You can use the watch tables to monitor the current values of the individual tags of a user
program or a CPU on the programming device/PC, on the display of the CPU, and on the
web server. A symbolic name for the tags must be specified in the "Name" column of the
watch table to allow the display of the CPU and the web server to show the value of the
tags.
You can monitor the following operand areas:
– Inputs and outputs (process image) and bit memory
– Contents of data blocks
– Peripheral inputs and peripheral outputs
– Timers and counters
● Modifying tags
Use this function to assign fixed values to the individual tags of a user program or CPU
on the PG/PC. Modifying is also possible with Test with program status.
The following operand areas are modifiable:
– Inputs and outputs (process image) and bit memory
– Contents of data blocks
– Peripheral inputs and peripheral outputs (for example, %I0.0:P, %Q0.0:P)
– Timers and counters
● "Enable peripheral outputs" and "Modify now"
These two functions enable you to assign fixed values to individual peripheral outputs of
a CPU in the STOP mode. You can also use them to check your wiring.
Automation system
System Manual, 09/2016, A5E03461182-AD
Test functions and fault resolution
14.1 Test functions
227