Rockfordmfg
Member
Hello Everyone.
I have a application that I'm working on that will require 3 axis of stepper motion (constant velocity) and 3 PID loops to control a main spindle inverter drive via analog.
I've been using an AB Micrologix 850 (2080-LC50-48QBB) and have had issues with real numbers. The software/hardware has "hijacked" 2 of my variables and puts in very small numbers (1.xxx * 10^-36) and won't let me change them. Rockwell and my local support cannot explain this issue and recommend using a ControlLogix which would at the very least least double the cost of this project.
I would like advice on any other PLC/PAC that might reliably work for this situation. We are usually AB guys here, but we have used other controllers when cost or physical size was the driving factor. I've looked at Automation Direct Productivity 1000, but cost is basically a wash with the Micro 850 and not sure about their reliability. Also looking at a TRiPLC, but have no experience with them. They would effectively reduce the cost by about 40-45%
I need the following (per section of the machine - I have 7 sections total)
Ethernet (Modbus TCP/IP)
Serial (RS-485 Modbus RTU)
3 HSC (Not necessarily high speed, but something that can handle 350 PPS)
3 Stepper Motion axes for constant velocity
3 PID loops
3 analog in - 0-5V preferred
4 analog out - 0-10V preferred
28 24VDC Digital In
21 24VDC Digital Out
Thanks in advance.
I have a application that I'm working on that will require 3 axis of stepper motion (constant velocity) and 3 PID loops to control a main spindle inverter drive via analog.
I've been using an AB Micrologix 850 (2080-LC50-48QBB) and have had issues with real numbers. The software/hardware has "hijacked" 2 of my variables and puts in very small numbers (1.xxx * 10^-36) and won't let me change them. Rockwell and my local support cannot explain this issue and recommend using a ControlLogix which would at the very least least double the cost of this project.
I would like advice on any other PLC/PAC that might reliably work for this situation. We are usually AB guys here, but we have used other controllers when cost or physical size was the driving factor. I've looked at Automation Direct Productivity 1000, but cost is basically a wash with the Micro 850 and not sure about their reliability. Also looking at a TRiPLC, but have no experience with them. They would effectively reduce the cost by about 40-45%
I need the following (per section of the machine - I have 7 sections total)
Ethernet (Modbus TCP/IP)
Serial (RS-485 Modbus RTU)
3 HSC (Not necessarily high speed, but something that can handle 350 PPS)
3 Stepper Motion axes for constant velocity
3 PID loops
3 analog in - 0-5V preferred
4 analog out - 0-10V preferred
28 24VDC Digital In
21 24VDC Digital Out
Thanks in advance.