Program Test; Signal Status Display - Siemens SIMATIC S5 Manual

S5-115F Manual
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).
STATUS
= A 2.0
Transfer data
Figure 4-1. Comparison of the "STATUS" and "STATUS VAR" Test Functions
EWA 4NEB 811 6149-02
Scan trigger
control
am in
P 5
1 1
Scan trigger
Control
program in
STEP 5
Transfer data
STATUS
VAR

Program Test

4-1