It would be advisable to gain some background information on the system you are trying to put together. There are different means of getting the system to operate, either hardwired I/O signals to/from the VFD/PLC or by fieldbus protocols like Profibus, DeviceNet, Modbus, etc. Furthermore ...
If we are talking about induction motor control, which is the most common case, usually a VFD (Variable Frequency Drive) is an electrical device placed “between” a PLC and motor, providing a connection of control logic and circuits on one side, with desired power output at the other side...
If it’s being run and monitored over a network, have full understanding of how the network option installs and how to initialize it. Case in point: If using Ethernet, the PLC or computer system with which the drive interfaces also needs parameter setting for communications with the drive. ...
ProSoft’s AN-X2 modernization gateways have templates built in. This means that you can install a brand-new PowerFlex® drive with EtherNet/IP™ communications, and have all of the Remote I/O data connected exactly as if the old VFD was still there. Your PLC-5 will never know the ...
The New G220 VFD from Siemens (P214) Shawn Tierney meets up with Ivan Spronk of Siemens to learn about their new... Schneider Altivar Machine Drives (P187) Shawn Tierney meets up with Jay Cortel, Nicolas Rosner, and Charlie Adkins to learn... ...
Step 2 – Enter the code in the PLC program Example 1, Read kW data from VFD 1 for Cooling Tower Fan 1: Example 2, Read Run Status data from Chiller 2: Example 3, Write Glycol Chilled Water Setpoint to Chiller 2: Modbus RTU from a Modicon Unity PLC Ethernet port (through an Etherne...
Data in an array can be called with a common namespace. Makes it easier to sort data Easier to do math on a set of data points In the memory layout of a PLC, array elements are usually stored in contiguous ( back-to-back) memory locations. This has some benefits for retrieval when ...
Speed Potentiometer: Allows the operator to set motor speed with pot. Digital Programming / Display Unit: Allows the operator to program and troubleshoot the drive by inputting values through a keypad with an LED or LCD display unit. Drive operation can also be monitored through this display. ...
code that I implemented (by starting with code someone else created) for ModBus spindle control had two areas that appear to control the PLC interval. One was the following function (however that function did not appear to be called anywhere in the code I was using for ModBus spindle control...
Training:Allen Bradley PLC Communicate with Excel Now let’s got to Rslinx, First of all, create a communication driver Emu-500 for running the program in an emulator. Now go toDDE/OPCthen click on the topic configuration. A dialog box opens up as shown below. ...