SIMATIC PCS 7 Condition Monitoring Library Siemens

Обзор



Power and efficiency characteristic of a pump

The SIMATIC PCS 7 Condition Monitoring Library (CML) expands the functionality of the SIMATIC PCS 7 Advanced Process Library (APL) with blocks for monitoring and analyzing mechanical assets (plant components such as pumps, valves, etc.). The CML blocks serve to increase the efficiency and availability of mechanical assets and to detect any damage at an early stage. They are designed in the APL style and therefore fit perfectly into APL-based process pictures.

The SIMATIC PCS 7 Condition Monitoring Library includes the following blocks:

  • PumpMon for monitoring of centrifugal pumps
  • VlvMon for monitoring of control valves
  • SteadyState for detection of stationary states in a dynamic process
  • PST for the online valve test without interfering with production
  • PressDropMon for monitoring pressure loss/pressure drop, e.g. in filters

Notes:

  • The SIMATIC PCS 7 Condition Monitoring Library V8.1 is available as download file:
    http://support.automation.siemens.com/WW/view/en/99741825
  • The SIMATIC PCS 7 Condition Monitoring Library V8.1 can be used in combination with SIMATIC PCS 7 V8.1 (incl. SIMATIC PCS 7 Advanced Process Library).
  • To implement a Partial Stroke Test application, S7 F systems V6.1+SP2 must be installed before the PST block.

Функции



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

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

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

PressDropMon block

Based on the flow resistance, the PressDropMon 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.

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
  • VlvMon: 10 POs
  • SteadyState: 2 POs
  • PST: 30 POs
  • PressDropMon: 10 POs