2 Solution
2.2 Description of the core functionality
Monitoring of 24 V load circuits
Entry-ID: 61450284, V1.1, 05/2014
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2.2
Description of the core functionality
Principle of the core functionality
The diagram below shows the sequence of the core functionality in this application.
Figure 2-2
PSE 200U
S
CHANNEL_STATE
S7-CPU
SIMATIC Panel
IMPULSE
0
0
1
1
OUT 4
OUT 3
OUT 2
OUT 1
1
2
3
4
PSE_DIAG
DATA
The following table describes the process.
Table 2-3
No.
Action
1
The PSE_DIAG (FB50) block reads the signal of the state output (S) of the PSE200U module
via its IMPULSE input and evaluates it.
2
At its CHANNEL_STATE output, the PSE_DIAG (FB50) block indicates the state of outputs
OUT 1 to OUT 4 of the PSE200U module.
3
The status information indicated at the CHANNEL_STATE output is saved in data block DATA
(DB2).
4
The states are read from data block DATA (DB2) and displayed at the SIMATIC Panel on
several screens.
Furthermore, messages on the state of output OUT 1 to OUT 4 are indicated at the SIMATIC
Panel.
