6 Selective monitoring of 24V feeders
Integration of a SITOP 24V power supply in PCS 7
Entry ID: 10948108, V3.2, 01/2019
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6.2
Copying process tag types
Before starting to create the AS program, it is advisable to copy the necessary plan
templates to the master data library of the PCS 7 project.
Process tag type "PSE200U" is available for a selectivity module with single-
channel alarm. This tag type contains the "Pcs7DiIn" driver block and a "MonDiL"
monitoring block for each channel. The configured "PSE_DIAG" block (FB1514)
processes the output signal of the module. Make sure that the CFC chart is called
in a cyclic interrupt OB with a low cycle time (e.g. OB38 - 10ms). This is necessary
so that the diagnostics block can record the time sequence of the signal change.
Figure 6-3 CFC plan for monitoring a selectivity module with single channel reporting
In the present example, we used a selectivity module with a common signaling
contact. You can use the "SITOP" process tag type for this module. This tag type
contains the APL blocks for collecting a digital input signal.
Proceed as follows:
1. Open the SITOP library "SITOP_APL_V3_2".
2. Copy process tag type "SITOP" (1) to the "Process tag types" folder in the
master data library.
3. Make sure that you copy the APL blocks that are used to the master data
library too. To do this, create a CFC plan (2) into which you copy blocks
"Pcs7DiIn" and "MonDiL" from the PCS 7 APL.
4. Apart from this, you need APL blocks "OpDi01", "TimerP" and "Pcs7DiOu" for
the reset signal. Paste these blocks into the additional CFC plan (2) too.
