9/15/2017 7:01 AM | |
Posts: 4 Rating:
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smiffy may you can help me. i am use cpu 417 and conected rs485 by 6es7138-4df11 to 3 slaves abb acs550 motor driver. comunicate with fc03 (s-send) and fc04 (resieve) by function code 03 i perfect read 12 registers status words of each drv. (40001-40012) and store in db. by function code 06 i perfect write one register ( control word) (run\stop) on each drv. and second request by function code 06 i perfect write one register ( reference) (speed) on each drv. this week i tried to use f.code 16 to write same 2 registers in (40001-40012) by one request. but it stop work. (plc is run but no tx\rx). may be it because the register 40004 is status word and it reading only. i get done with error bit . when i use f.code 16 i only insert row of "n registers" i need to write. and change f.code . second i dont understand the lens of block. in data sheet of modbus card writed the lens of conection is only 6 bytes. in fc16 writed >6 bytes what is mean? if i set bigger then 6 it stop work. what i am doing wrong? ------------------------------------------------------------------------------------------ |
Last edited by: lsergey2016 at: 9/15/2017 7:02:10 AMLast edited by: Jen_Moderator at: 9/15/2017 12:36:43 PMNew subject after splitting |
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9/15/2017 10:52 PM | |
Posts: 4 Rating:
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Hello Kaulquappe. pdf file is efb protocol for abb driver. on page 19 is f.codes supported by abb and pages 24-25 is registers i read\ write. we have 50 abb drivers connected by profi-bus. registers 5310-7 are registers for control all driver functions. in this 8 registers you can set all parameters you want to change in process. like reduce output voltage or set new protect currect. like we have diffrent motors connected to one driver, and each time you need set new protect current. this work perfect on profi-bus. now i try to start use modbus to same work. maybe it not work for modbus. i am new on modbus protocol ( starting to learn this protocols) so i get error bit, because the registers is read only? AttachmentEN_ACH550_EFB_D.pdf (211 Downloads) |
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