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Productivity 1000 Series PLC PID Ramp Soak

Productivity PLC – PID Ramp Soak Instruction
The purpose of a ramp soak instruction is to make gradual, controlled changes in temperature (Ramp), followed by a temperature hold (Soak) period.
We will be using our Proportional-Integral-Derivative PID Instruction that we looked at last time to apply the ramp/soak instruction.
Productivity 1000 Series PLC PID Ramp Soak Instruction
Using the immersion heater in a cup of water to keep the temperature at a constant value, we will be adjusting the profile of the temperature as we increase the set point (Ramp) and hold that set point for a predetermined time. (Soak)
Productivity 1000 Series PLC PID Ramp Soak Instruction
We will be modifying our existing program from our PID loop instruction. Let’s get started. Continue Reading!

Productivity 1000 Series PLC PID Instruction

PID Loop (PID) Instruction (Auto Tuning) – Productivity 1000 PLC
A Proportional-Integral-Derivative algorithm is a generic Control Loop feedback formula widely used in industrial control systems. A PID algorithm attempts to correct the Error between a measured process variable and the desired setpoint by calculating and then outputting a corrective action that can adjust the process accordingly and rapidly, to keep the Error to a minimum.
Productivity 1000 Series PLC PID Instruction
The following links will explain the PID instruction.
https://www.csimn.com/CSI_pages/PIDforDummies.html
http://www.ni.com/white-paper/3782/en/
https://en.wikipedia.org/wiki/PID_controller
We will be using an immersion heater in a cup of water to keep the temperature at a constant value. Using the Productivity Suite software we will perform an autotune on our PID instruction.
Productivity 1000 Series PLC PID Instruction
Our immersion heater will be controlled through a relay using time proportional control from our PID output. Let’s get started. Continue Reading!

Productivity 1000 PLC AdvancedHMI Modbus TCP

We will now look at communication between the Productivity 1000 PLC (Modbus TCP Server) and AdvancedHMI (Modbus TCP Client). Advanced HMI is a powerful, adaptable HMI/SCADA (Supervisory Control and Data Acquisition) development package that takes advantage of Visual Studio. There is no coding required and you can simply drag and drop items onto the page. The best thing is that the software is free. We will look at using AdvancedHMI with the Productivity 1000 Series PLC.
Productivity 1000 Series PLC AdvancedHMI Modbus TCP Ethernet Communication
Our sample Productivity 1000 PLC program will display a digital panel meter and a gauge of a value in the PLC. Stop and start momentary pushbuttons on the HMI will allow this number to increase or stop. An indication will turn green when the number is increasing and red when it has stopped. The AdvancedHMI package will communicate Modbus TCP over Ethernet to the Productivity 1000 PLC. We will be able to monitor our process via the AdvancedHMI window. Let’s get started.
Productivity 1000 Series PLC AdvancedHMI Modbus TCP Ethernet Communication
Continue Reading!

Productivity 1000 Series PLC Firmware Update

Firmware is usually PLC operating system code that is written into a read-only memory. The BIOS (Basic Input Output System) of a PC (personal computer) is a good example of the firmware. It provides the low-level interface between the hardware and software. The firmware for the productivity series of PLCs must be downloaded separately from the programming software.
Productivity 1000 Series PLC Firmware Update
We will be updating our firmware of our Productivity 1000 PLC from 1.2.5.36 to the latest version 1.2.7.37. Let’s get started. Continue Reading!