CRIUS? and CRONOS? Devices

CRONOS? and CRIUS?4.0 from Pi have extremely powerful processors, a considerable array of I/O and over 500,000 lines of code! Pi’s controllers can be used as simple analysers or as complex controllers, that are often used to replace PLCs.

Devices

Every time a customer asks us to introduce some added functionality to the CRONOS? or CRIUS?4.0, we add a ‘device code’. A device code allows us to add the requested functionality to only those that require it. For example, if all you need is a sensor input, a 4-20mA output and a couple of relays, then this is perfectly possible. If however, you need more functionality, below is a list of some of the possible device codes we offer. (If what you’re seeking isn’t listed, give us a call on +44 (0) 1282 422835)

Process Control Device Codes

PID Trim: Calculates how much of a chemical to add based on flow rate, pump size and chemical concentration. Uses a sensor measurement to trim the dosing up and down as required.

PID: Maintains a set point and can be used to define how much chemical to add, how much to turn a pump on or how much to open a valve based on sensor measurement.

PID Flow: Maintains a setpoint and can be used to define how much chemical to add, how much to turn a pump on or how much to open a valve whilst taking into consideration both flow and sensor value.

Feed Forward: Employs a user defined correlation to give the correct output based on a variable input value. Up to 5 points are defined within the correlation. Also uses a flow proportional element to vary the output as flow changes.

Polymer Dosing: Calculates how much of a chemical to add based on flow rate, pump size, and chemical concentration. It has inbuilt functions to allow lines to be flushed before and after dosing starts/stops to prevent blockages.

Input/Sensor Based

Arithmetic Virtual Sensor: Allows a calculation to be performed between 2 parameter values. Options include x, +, - or ÷.

Manual Virtual Sensor: Acts as a sensor input and whose values can be changed through the user defined interface or remotely via a comms connection, such as Modbus.

Signals, Logic and Switches

Virtual Setpoint: Takes a control output and applies a user defined mx+c equation to give another value.

Logic Gate: Allows a combination of up to 5 on/off signals to give a combined on/off signal output in an AND/OR/NAND/NOR configuration.

Status Signal: Allows any status, parameter or system flag to be converted into an on/off signal that can be used elsewhere in the system.

Signal Events: Triggers up to 5 actions to take place on either the rising or falling edge of an on/off signal input

Challenge Us!

If you have a control application, challenge us to design the right system using a CRIUS? or CRONOS?, and let us show you how you can achieve exceptional process control whilst saving money.

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