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Found 12 results

  1. Hi, We have a discussion in our office concerning the correct way of wiring an external current signal 4-20mA to a 1756-IF16 module. (We do many different PLC brands and configurations, so my/our experience with Alan Bradley is of several years ago) We have several external current signals connected to these units. (And these systems are all situated on a ship.) Some are galvanic separated and others are not and have their 'own' power supply only a few are sensors that are loop powered by the Main PLC cabinet.   The issue: According to one colleague it is required to connect the RTN jumper wires to the negative of the main PLC cabinet to solve signal issues due to floating voltage. Although it will work, I am not sure if this is really necessary, and I don't like connecting the negative to other cabinets which have their own power supply... Alan Bradley does not indicate that this is required, only jumper wires to convert the circuit from voltage measurement to current. It is also disappointing that none of the (non-differential) examples of Alan Bradley show how to connect an external current signal (which would indicate if the extra negative to be needed)   Adding galvanic separators and connecting the RTN to the negative is in my opinion not so much a solution but an evasion of the question/issue.   Any knowledge out there? Thnx
  2. Are there any current recipe examples for omron na hmı?Are there any current recipe examples for omron na hmı?Are there any current recipe examples for omron na hmı?
  3. I have project where I need to measure motor current but I do not need to control the speed of the motor since it would always be running at full speed. Do I still need to use VFD to get feedback or is there cheaper way to measure the current?
  4.    Have 10 POE Analog Input Modules available on clearance  10/20-channel Voltage Input, Current Input, & Analog Input Module with High Voltage Protection PoE Module, communicable over Modbus TCP and Modbus UDP    Model Number PET-7017-10     Regular price $459.00/EA    Clearance price $344.25/EA   only good on clearance quantity only.   http://www.icpdas-usa.com/pet_7017_10.html      
  5. Hi to everyone, I use PowerFlex 520 drive on profibus (with adapter 25-COMM-P) for first time. I managed to start/stop/reference drive using Logic Command/Status I/O but didn't manage to get output current using datalinks mechanism. I configured DP master (Mitsubishi Q PLC, QJ71PB92V) as shown in the attached picture. The main problem is that trying to modify C161-C164 (Opt Data In 1-4) parameters drive does not accept the entered values and it turns back to value "0". First, I disabled I/O connection with the controller Disconnecting the drive from the network. On the other hand, drives allow me to change parameters C165-C168 (Opt Data Out 1-4) but these are out paramenetrs (from the controller's point of view). Is there any guy that managed to get the output current  in any way on profibus network? Thanks a lot for your help in advance! I post this message in Allen Bradley Forum, too.
  6. Hi to everyone, I use PowerFlex 520 drive on profibus (with adapter 25-COMM-P) for first time. I managed to start/stop/reference drive using Logic Command/Status I/O but didn't manage to get output current using datalinks mechanism. I configured DP master (Mitsubishi Q PLC, QJ71PB92V) as shown in the attached picture. The main problem is that trying to modify C161-C164 (Opt Data In 1-4) parameters drive does not accept the entered values and it turns back to value "0". First, I disabled I/O connection with the controller Disconnecting the drive from the network. On the other hand, drives allow me to change parameters C165-C168 (Opt Data Out 1-4) but these are out paramenetrs (from the controller's point of view). Is there any guy that managed to get the output current  in any way on profibus network? Thanks a lot for your help in advance!  

  7. FX3G-2AD-BD Store Peak Value

    Swervomotor posted a topic in Mitsubishi

    Good day, I'm new to this forum and to mitsubishi PLC but was hoping for some assistance with a programming issue. I have been through the hardware and programming manuals without luck for this issue. Hardware: FX3G-60mt FX3G-2AD-BE Settings: Structured ladder/FBD Current input mode on: M8260 (first board, first input)   What I need to do is to record the peak value over a cylinder stroke period. The hardware manual explains how to average the value using averaging time, however I basically need to peak hold and send that to a D register for go no-go compare.    Process as follows: Contact closed, monitor D8260, contact open, move peak value from D8260 during monitor duration to D205.    Thanks in advance for any assistance. -Swervomotor  

  8. Version 1.0.0

    130 downloads

    Temperature measurement usind Arduino Nano, RTD PT100 sensor,  4-20 mA current loop transmiter, and a python app for visualization
  9. View File Temperature measurement using Arduino Nano, RTD PT100 temperature sensor and 4-20 mA transmitter Temperature measurement usind Arduino Nano, RTD PT100 sensor,  4-20 mA current loop transmiter, and a python app for visualization Submitter Absolutelyautomation Submitted 04/01/16 Category Other PLC Demo Software
  10. Greetings, I've been having some issues with a vacuum pump breaker tripping... I think I've figured out the problem and resolved it but I noticed that several of the other motors have current monitoring on the HMI but the person who set this up is no longer with us.  I'm wondering what I need besides an analog input for my control logix processor (which I have) to setup this project.  I'm not sure if the other motors are just monitoring one leg of the 3 phases or if they are somehow showing total current?  any ideas and recommendations would be greatly appreciated.   thanks,
  11. I have been using a micrologix 1400 L32bxba. I have had a reoccurring problem of the contacts sticking on the processor. I have added diodes on the coils of the contactors. Using 700CB220EJ relays. I also have the problem of the leakage current being so high it pulls in the relays with the output off. Any help would be appreciated.
  12. Hello everybody, I am connecting my DCS digital output (115VAC) to AB PowerFlex 753 Digital Input. We are using the 20-750-2262D-2R I/O option in the powerflex which is 115VAC I/O with 2 Analog In, 2 Analog Out, 6 Digital In and 2 Relay Outputs. My question is, what is the current or power consumption of the PowerFlex DIs at 115VAC. I need to specify the right fuse size for my digital output. Thanks,