4 Functional Mechanisms of the Application
4.4 Visualization
Monitoring of 24 V load circuits
Entry-ID: 61450284, V1.1, 05/2014
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States of outputs OUT 1 to OUT 4 of the PSE200U module
The individual bits of the CHANNEL_STATE variable contain the states of outputs
OUT 1 to OUT 4 of the PSE200U module and are assigned in the text fields. This
enables representing the states of outputs OUT 1 to OUT 4 via the background
color of the text fields.
Each text field shows the state of one output OUT 1 to OUT 4 of the PSE200U
module.
Each of the outputs OUT 1 to OUT 4 can take on state 0 or 1.
The text fields are represented red or green independent of the state of output
OUT 1 to OUT 4 (see
).
The following table shows which states of module PSE200U cause the outputs
OUT 1 to OUT 4 to go to state 0 or 1.
Table 4-8
State of PSE200U
State of OUT 1 to OUT 4
Output enabled
1
Output current > rated current
1
Device starting up, supply voltage missing
0
Output was automatically disabled
0
Automatic disable can be reset
0
Output manually disabled
0
Output defective (internal fuse has tripped)
0
Device over temperature
0
Status of the PSE_DIAG (FB50) block
The STATUS_SAVE variable contains the state of the PSE_DIAG (FB50) block
and is assigned to an I/O field.
4.4.2
Controls the remote reset input (RST) of the PSE200U module
The HMI_RESET variable is assigned to the “RESET” button.
This enables you to set the variable to value 1 via the SIMATIC Panel and reset it
to value 0 again.
In the user program of the S7-CPU (OB1) the HMI_RESET variable is assigned to
the digital RESET output (Q8.4). The digital output is connected with the remote
reset input (RST) of the PSE200U module.
When clicking the RESET button, the HMI_RESET variable is set to value 1, so the
digital RESET output (Q8.4) and the remote reset input (RST) are controlled to
trigger a reset of the PSE200U module. Outputs OUT 1 to OUT 4, which were
automatically switched off due to a failure, e.g. overload or short-circuit, are
automatically switched back on if the wait time of 20s has already elapsed.
As soon as you release the RESET button, the HMI_RESET variable is reset to
value 0. The digital RESET output (Q8.4) and the remote reset input (RST) are no
longer controlled.
