Siemens SIMATIC PCS 7

SIMATIC PCS 7 Maintenance Station10

Performance monitoring of turbo compressors with the

block CompMon:

Depending on the type of medium, the aerodynamic perfor-

mance of a turbo compressor can be impaired by fouling,

caking, or abrasion. The location of the operating point can

also be affected by variances in the state of the medium being

pumped in depending on temperature, pressure and compo-

sition or by changes to the flow resistance on the load side.

The block CompMon calculates performance characteristics

(e.g. conveyance or efficiency) and issues a warning if the cor-

responding values indicate damage to the compressor, caking

by pollutants on the runner or erosion of the blades from the

fluid.

Standard diagnostics functions

In order to obtain information on the diagnostics status of in-

dividual plant areas or components, maintenance engineers

can change from the overview display to the respective diag-

nostics display of the subordinate hardware level. If a fault is

signaled in the overview display, the "loop in alarm" function

permits rapid switching to the diagnostics faceplate of the as-

sociated component. The information is filtered according to

the area of responsibility of the user.

The following information can be offered:

• Display of diagnostics status determined by the system

• Information on the component, such as process tag name,

manufacturer or serial number

• Display of diagnostics messages of a component

• Visualization of type and current state of initiated mainte-

nance measure

Design of a Maintenance Station

The SIMATIC PCS 7 Maintenance Station is of modular design.

In small plants it is possible to install the operator station and

the Maintenance Station on the same PC. Just like the opera-

tor system, the Maintenance Station can be expanded into a

client/server application with multi-client operation. The sig-

nals and messages from the components and devices which

are relevant to maintenance are collected and saved on the

server of a client/server application. They are displayed on the

client.

The SIMATIC PCS 7 Maintenance Station is based on standard

SIMATIC products:

• SIMATIC PCS 7 ES / OS

for configuration and HMI functions

• SIMATIC PDM

for connecting the field devices and

• SIMATIC SNMP OPC Server

for interfacing network components

Configuring a Maintenance Station

When setting up a Maintenance Station, the user only

has to assign the corresponding attribute once during the con-

figuration. This automatically generates a technological hier-

archy for diagnostics displays.

The diagnostics displays can be subsequently expanded by

project-specific contents.

When configuring PCS 7, the technological plant view automatically

becomes its own maintenance area

Visualization in the Maintenance Station

In the operating state, the Maintenance Station's client re-

quests cyclic data from the associated server. The client can

additionally access hardware components and field devices di-

rectly by means of an online connection so that the mainte-

nance engineer has the relevant information available at all

times. Various components with highly different diagnostics

capabilities are used for SIMATIC PCS 7. However, from the vie-

wpoint of maintenance, all components are displayed in the

same manner. Therefore the maintenance and diagnostics

conditions of the components are represented by standar-

dized symbols.

Technological plant view

Maintenance

Station

Transfer of maintenance-

relevant information to the

Maintenance Station

Operator

Station

G_ST70_XX_00414

Maintenance_PA_04_2010_en.book Seite 10 Dienstag, 6. September 2011 9:45 09