m_a_s001 Posted October 29, 2020 Report Share Posted October 29, 2020 Hello people! I need some help to do the follow in sinamics G120 via modbus: Read a Digital Input: I read parameter 40240 with a V350 (239 in unilogic) but always is in 0 Write a Digital Output: I write parameter 40220 with a V350 (219 in unilogic) but always is in 0 Read Analog input: I read parameter 40260 with a V350 (259 in unilogic) but always is in 0 The communication is ok because I can command the motor with parameter 40100 (writting 47F and 47E) and change the speed in parameter 40101. Thanks!! Best Regards Mario Quote Link to comment Share on other sites More sharing options...
MVP 2023 kratmel Posted October 29, 2020 MVP 2023 Report Share Posted October 29, 2020 https://cache.industry.siemens.com/dl/files/159/99685159/att_83708/v1/G120_Field_busses_FH17_0414_eng_en-US.pdf Please read p.101 What do slave when Invalid read requests... And p.102 about write. Please check registers that you mark in your previos topic. Some of them may disable external request to slave. SIemens use system of binector for configure signal flow inside the device. Please check via Siemens software signal flow from Inputs and to outputs. Sometimes user must to define control sorce... Quote Link to comment Share on other sites More sharing options...
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