Siemens SIMATIC S5 - 4 Program Test; Signal Status Display

S5-115F Manual Program Test
4 Program Test
Use the following test functions to find and eliminate logic errors in program scanning.
Note
Test blocks are not possible with the S5-115F.
4.1 Signal Status Display
Two test functions indicate operand signal states and the result of the logic operation (RLO).
Depending on when signal states are examined, a distinction is made between program-
dependent signal status display (STATUS) and direct signal status display (STATUS VAR).
control
am in
P 5
Transfer data
Scan trigger
STATUS
= A 2.0 1 1
Transfer data
Scan trigger
Control
program in
STEP 5
STATUS
VAR
Figure 4-1. Comparison of the ”STATUS” and ”STATUS VAR” Test Functions
EWA 4NEB 811 6149-02 4-1