PLC Tutorials - Instrumentation Tools

Normally-open and Normally-closed Switch Contacts

Perhaps the most confusing aspect of discrete sensors is the definition of a sensor’s normal status. Electrical switch contacts are

Failsafe wiring practice is one of those topics that separates control system designers and electricians from other technical specialties. This

An instrument’s accuracy is limited by its precision. An instrument’s precision is determined by making minute variations in the measured

For any unit conversion on any PLC, you can use four function math with the following for PLC Analog Input

Ina process plant, on/off control is done through the PLC or DCS. The below Figure is an overview of one discrete/digital

Unlike the discrete/digital (on/off) circuit, analog signals vary across a range of voltage or current. Taking the same vessel described

Troubleshooting PLCs can be started by checking the healthiness status of CPU, I/O Modules, Fuse Blow-out and different PLC Failure

Instrumentation and control rely on converting physical or process variables into a more useful format for the operator display. Pressure

I am always surprised how an automation system like PLC or DCS does the scaling for a sensor ? or

The main difference between DCS and PLC is the business model which we discussed with comparison of DCS Versus PLC