Welcome to Automation WA by Nessie Services Perth Western Australia

 Industrial Automation Solutions, PLC Programming & Control Systems

Siemens Simatic Step 7 upgrade Projects Ammonia Screw Compressor

Nessie Services was asked to upgrade the Ammonia Screw Compressor

Electrical Diagram for control, PLC and HMI logic development was the job for this upgrade.

Because everything can be controlled by the HMI, all external buttons and indicators have been removed

The -Main- screen contains bar graphs for all relevant pressures and temperatures.

Setpoint adjustments can be reached easiely from the Main screen by pushing the bar graph:

compressor main

The load can be adjusted from the main screen as well and can be stopped or manually adjusted.

Load Control:

Compressor load/unload

Oil Temperature

oil temperature

Settings Oerview

overview settings

Startup Settings

startup settings

Timer Settings

timer settings

Oil pump Compressor Settings

oil pump settings

Suction Pressure

suction pressure

Discharge Pressure

discharge pressure

Discharge Temperature

discharge temperature

Motor Load


Oil Temperature

oil temperature

Oil Pressure

oil pressure

Actual Settings Overview

actual settings

Original Components:

Sprecher & Schuh Sestep 328

New Components:

Siemens CPU 1214-C with additional Analog Input Module



Nessie Services, your partner for quality, reliability and efficiency!

Our Services:

- Project Management

- Control Systems

- PLC Troubleshooting / Fault finding, on site or via remote access

- PLC Backup

- PLC Parts

- PLC Conversion / Upgrade

- Process Monitoring System

- Operator optimised PLC/HMI/Scada development

- After Sales Service and programmed maintenance

- Maintenance Department and / or Operator Training including Manuals

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