adccommunitymod (AutomationDirect) asked a question.

writing inputs to servo drive

Created Date: May 03,2007

Created By: a agnone

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Not really clear on writing values to the servo drive. Can the inputs be changed. I was hoping I could increase inputs by loading different values into the P2-10 through P2-17. Pages 7-13 and 7-14 not really clear. I did figure out most of it. Reading from drive seems easy, but not writing to the drive. Seems limited. Could this be a firmware upgrade to be able to write to the inputs and change them?


  • adccommunitymod (AutomationDirect)

    Created Date: May 03,2007

    Created by: sf93

    You can change the inputs to the drive. I just got done doing a project that I did it on, and once I got it figured out it works quite well.

    Using the Modbus write instruction and function code 16. Set the slave start address to 40523(page 7-5,DI1 Modbus address). And let say the Master start memory address to v2000. Now all you have to do is load the proper decimal value of the DI function (on page 5-38)in v2000 - v2007 to change DI1-DI8.

    For instance you want to set DI1 for jog forward. You would load 137(decimal) to v2000. Now you want to change DI1 to start home move trigger. You would load 127(decimal) into v2000.

    I hope this helps a little

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  • adccommunitymod (AutomationDirect)

    Created Date: May 04,2007

    Created by: a agnone

    Wow thanks for the info. Is that what they are doing on page 7-14? They have V2000 to V2003 with values for P0-12 to P0-15. Page 7-17 shows writing to Modbus 40013. Would this look different? Would it be LD k8, LDA O2000, WX V523? Would you mind posting the rungs that load to the drive. I will be using a DL250-1, but if you use a DL260 thatis fine. I can change out the CPU. The DL260 using the function blocks. So by simply loading new values into V2000-V2007 I can change my inputs. This really helps in expanding the inputs. I want to use the C-More with a setup screen so I can jog or do other things with the servos. Did you ever think of writing some real case rungs for the servos? Some times the examples are too simple or not clear.

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  • adccommunitymod (AutomationDirect)

    Created Date: May 03,2007

    Created by: a agnone

    Not really clear on writing values to the servo drive. Can the inputs be changed. I was hoping I could increase inputs by loading different values into the P2-10 through P2-17. Pages 7-13 and 7-14 not really clear. I did figure out most of it. Reading from drive seems easy, but not writing to the drive. Seems limited. Could this be a firmware upgrade to be able to write to the inputs and change them?

    Expand Post