Siemens SIMATIC PCS 7 사용자 설명서
SIMATIC PCS 7 Maintenance Station
9
Maintenance Station – User interface for maintenance
The SIMATIC PCS 7 Maintenance Station software package
is available as an alternative to SIMATIC PCS 7 for imple-
menting Plant Asset Management. You can use this soft-
ware package to expand an Operator Station to a
Maintenance Station.
is available as an alternative to SIMATIC PCS 7 for imple-
menting Plant Asset Management. You can use this soft-
ware package to expand an Operator Station to a
Maintenance Station.
The maintenance engineer can process the diagnostics messa-
ges and maintenance requests of the assets on the Maintenance
Station. Via the Maintenance Station the engineer can access:
• Electronic components of the process control system: intel-
ges and maintenance requests of the assets on the Maintenance
Station. Via the Maintenance Station the engineer can access:
• Electronic components of the process control system: intel-
ligent field devices and I/O modules, field bus, controller,
network components and plant bus as well as servers and
clients of the operator systems.
network components and plant bus as well as servers and
clients of the operator systems.
• Mechanical components that do not belong directly to the
process control system such as pumps, motors, centrifu-
ges, heat exchangers or control loops (passive or indirect
assets). These are represented by proxy objects in which
the diagnostics rules are stored.
ges, heat exchangers or control loops (passive or indirect
assets). These are represented by proxy objects in which
the diagnostics rules are stored.
Monitoring and diagnostics of mechanical components
For mechanical components without self-diagnostics (pumps,
heat exchangers, valves, compressors, etc.), inadmissible ope-
rating states can be determined from various measured values
that already exist in a process control system using special di-
agnostic blocks. Deviations from an established normal status
can be used for this, for example.
heat exchangers, valves, compressors, etc.), inadmissible ope-
rating states can be determined from various measured values
that already exist in a process control system using special di-
agnostic blocks. Deviations from an established normal status
can be used for this, for example.
Pump monitoring with the block PumpMon
The diagnostic block PumpMon is used for
• Warning of pump damage when there is blocking, dry run-
• Warning of pump damage when there is blocking, dry run-
ning, gas in the transported substance, cavitations, over-
load, or improper running;
load, or improper running;
• Early detection of initial pump damage, such as wear or de-
creasing pump efficiency;
• Long-term optimization the pump design by means of sta-
tistical analysis of the operating data, for example, recor-
ding the load spectrum.
ding the load spectrum.
Exceeding the limits of the pump's rated operating range and
deviations from the anticipated characteristic curve are repor-
ted to the user as maintenance alarm via the PumpMon block.
The block outputs are simultaneously made available for
further processing. In this way, the user gets the opportunity
to intervene in a preventive way to prevent damage to the
pumps, which helps to reduce plant downtimes and increase
its availability. It also allows the pump layout to be optimized.
deviations from the anticipated characteristic curve are repor-
ted to the user as maintenance alarm via the PumpMon block.
The block outputs are simultaneously made available for
further processing. In this way, the user gets the opportunity
to intervene in a preventive way to prevent damage to the
pumps, which helps to reduce plant downtimes and increase
its availability. It also allows the pump layout to be optimized.
PumpMon block: Transport characteristic curve with current operating
point
point
Valve monitoring with the block ValveMon
Abrasion, cavitation, corrosion of the valve plug or seat as well
as caking (fouling, deposits) are the most common signs of
wear for valves. ValveMon monitors the valve status according
to specific process values and enables the detection of mal-
functions and impending failures at an early stage.
as caking (fouling, deposits) are the most common signs of
wear for valves. ValveMon monitors the valve status according
to specific process values and enables the detection of mal-
functions and impending failures at an early stage.
Heat exchanger monitoring with the block HeatXchMon
The main problem with heat exchangers is fouling. Fouling re-
sults when residues of the process medium are deposited on
the transfer surfaces and thus impair efficiency. HeatXchMon
determines deviations of the current heat flow from the refe-
rence heat flow in the clean state. The current degree of fou-
ling, the energy loss and daily costs can thus be precisely cal-
culated and displayed.
sults when residues of the process medium are deposited on
the transfer surfaces and thus impair efficiency. HeatXchMon
determines deviations of the current heat flow from the refe-
rence heat flow in the clean state. The current degree of fou-
ling, the energy loss and daily costs can thus be precisely cal-
culated and displayed.
The HeatXchMon block not only indicates the current performance capa-
bility of the heat exchanger, it also calculates the daily energy loss due to
the degree of fouling.
bility of the heat exchanger, it also calculates the daily energy loss due to
the degree of fouling.
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