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mikeardy
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PostPosted: Mon Apr 16, 2018 2:24 pm |
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Joined: Mon Jan 22, 2018 10:07 am Posts: 27
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Hi, I need to read about 250 UDINT via Modbus in Slave mode. A SCADA manages this data and write via Modbus remotely to my controller. So inizially I configured on my controller a modbus slave device. Due to Modbus limitations I configured 4 channel in Read Holding Registers mode with an array of 125 elements (500 elements in total of WORD type). In a GVL I defined an array of 250 elements of UDINT type poiting at the starting address of the input registers, beginning at %IW60. Finally in my application program I used the array poiting values I need directly by index. Is it the right way or maybe there is a quite simpler or "more readable" and canonical method? See pictures I added to this post. Many thanks
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