4/11/2022 1:16 PM | |
Joined: 2/22/2008 Last visit: 8/6/2024 Posts: 2698 Rating: (207) |
The problem is a wrong Modbus connection. Try attached program, which is written in diagram mode, not in network mode. This may be easier for most applications, when only one Logo is connected to Modbus devices. I would never use green NAI's, but only local mapped variables. See menue tools -> ethernet connections -> Connection1 (Modbus Client). Inside is the VM mapping for this device. A float needs 2 register = 4 bytes, in this case the mapping is VM0. This means, VB0-VB3 or VW0 and VW2 are used. The next free variable then is VB4, VW4 or VM4 (VM for converters). Change the mapping to your desired HR (5xx) and ID (27 ?), then the right value will appear on the display of the message text. Regards, Scorp AttachmentModbustest.zip (658 Downloads) |
Last edited by: Scorp at: 04/11/2022 13:23:41 |
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This contribution was helpful to1 thankful Users |
4/11/2022 8:25 PM | |
Joined: 12/18/2014 Last visit: 10/5/2024 Posts: 33881 Rating: (4214)
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Take a look at attachment.
AttachmentLOGO! Bit, Byte, Word and DWord.pdf (504 Downloads) |
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