PumpMon block

The PumpMon block suitable for electric centrifugal pumps with both constant and variable speeds provides the following functions:

• Visualization of the current operating point of the pump in relation to the pump characteristic curve
• Early detection of imminent pump damage and warning in the event of unfavorable operating states
• Optimization of pump design through statistical evaluation of operating data

PrDrpMon block

Based on the flow resistance, the PrDrpMon block monitors the pressure loss or pressure drop in plant components depending on the flow rate. Such monitoring makes sense for all plant components whose flow resistance can change in an unwanted manner during operation due to buildup or blockage, for example, in filters, separators, heat exchangers or pipelines.

VlvMon block

Response monitoring of the valve: continuous setpoint and dashed actual-value characteristic

The VlvMon block that can be used for continuously adjustable valves with position feedback features the following functions:

• Detection and monitoring of wear-related movement data (added movement distance, number of direction changes)
• Early detection of imminent valve damage (e.g. deposits or caking, wear) through monitoring of reaction times and flow characteristic curves
• Warning of valve damage when approaching wear limits or unfavorable operating states, for example, continuous operation without valve standstill, permanent standstill, exceeding the maximum number of strokes or the maximum number of direction changes
• Long-term optimization of valve dimensioning by means of statistical analysis of the operational data (frequency distribution of the valve positions)

SteadyState block

The SteadyState block is used for the detection of stationary states in a dynamic process or steady state of a signal. It analyzes the input signal and decides online (without delay) whether this signal is steady or not.

PST block

Configuration example of the Partial Stroke Test (PST)

The PST block for the partial stroke test is used for:

• Testing the movement of the valve by partial closure during normal operation
• Increasing the diagnostic level for actuators, e.g. safety cut-off valves
• Extension of the intervals between the required full proof tests maintaining the same SIL level

Partial Stroke Test extends the test interval for the Full Stroke Test from 1 to 2 years

The scope of supply includes the following in addition to the PST block and its faceplate:

• Add-on functions for partial stroke test application
• PST engineering templates
• Pre-configured PST reports

License information

The SIMATIC PCS 7 Condition Monitoring Library is available free of charge. Depending on the block type used, the following number of process objects (PO) for "SIMATIC PCS 7 AS Runtime" and "SIMATIC PCS 7 OS Runtime" apply per block instance:

• PumpMon: 20 POs
• PrDrpMon: 10 POs
• VlvMon: 10 POs
• SteadyState: 2 POs
• PST: 30 POs