The Constantly Monitored Zone (CMZ) protects people and machines through continuous monitoring. Learn more about the different levels of monitoring and types of errors. The CMZ is essential and quality.
Constantly Monitored Zones (CMZ) are used in system areas or sequences that are constantly monitored by sensors or other monitoring mechanisms.
These are often critical components or processes where failure could have serious consequences. For example, the temperature of the cutting tool and material in a CNC machine is monitored to prevent overheating.
These zones are organized into three levels: the plant level, the hardware zone level, and the sequence level. This division determines which level is shut down in the event of a malfunction. A failure at the plant level, such as a loss of compressed air, will shut down the entire system. Failures at the hardware zone level will stop the affected zone, while failures at the sequence level will stop the corresponding process.
- Fatal faults are fatal errors that immediately disable automatic mode when a linked variable satisfies the condition.
- Gate/Fortress Faults occur upon access violations and disable automatic mode and display the corresponding access violation on the HMI.
- Warning faults are used to inform the operating personnel and indicate imminent hazards without affecting automatic mode.
The next video will show you more about the PLC code generated from the process model and how it can be created and exported.