Posted 29 Apr 2018 (edited) i have a plc Modicon M340 , HMI hmigxu3512x and VSD Altivar 71, and i only allowed to use serial MODBUS port in plc, now the VSD is a slave and is controlled with plc as a master how can i add the HMI to this configuration?? i know that this model of HMI can be slave but then how it will give orders to PLC to start stop etc.. and if PLC is slave how it will control the VSD?? Edited 29 Apr 2018 by engMoH Share this post Link to post Share on other sites
Posted 30 Apr 2018 no problem - M340 must be master and ATV71 and HMI are slaves Share this post Link to post Share on other sites
Posted 1 May 2018 hey @Quant i found this useful link https://www.schneider-electric.com/en/faqs/FA213155/ but as i thought all examples was mentioned is that plc writing on HMI, the questions is : if HMI slave and plc is master can i use buttons in HMI to switch on devices connected to plc ? and not jusr reading values from plc ? i will go with try and error anyway but i wanted to know if this was possible before Share this post Link to post Share on other sites
Posted 2 May 2018 sure, it must be possible to use buttons on HMI. Please read this article: https://www.schneider-electric.com/en/faqs/FA213155/?page=content&country=APS&lang=en&locale=en_US&id=FA213155 Share this post Link to post Share on other sites
