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I'm new in Codesys. I have to communicate with a large number of remote Modbus slave. For this I would like to create an "object" (FB or others... whatever) MBslave and instantiate it several times. I can realize this graphically (in the device tree in codesys) by creating under "Ethernet" a "Modbus_Master" module and then under that create all the Modbus_Slave modules. But for reasons of maintenance I want to realize this "by hand". Is this possible? I have already declared variables of type "ModbusTCPSlave" inserts ports, IP addresses, etc. But I am suck on mapping I/O?
Any information is very welcome! ;) Thanks.
Last edit: valeria 2021-07-20
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Again, thanks for the link.
I had a look at this example, understood the global idea and made a super very simple test : instance one object "clientTcp: ModbusFB.ClientTcp;"
The library ModbusFB was download "automatically" via Library Manager.
When I instance the object "clientTcp: ModbusFB.ClientTcp;" , I have no red underlined and when I compile the code get a bunch of errors relative to the ModbusFB library. For example "Unknown type: SysComSettings" and when I look through the ModbusFB library I just cannot find this method.
It looks to me that the ModbusFB library seems to be the wrong one or some dependencies are missing.
Any suggestion?
Last edit: valeria 2021-07-21
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
I'm new in Codesys. I have to communicate with a large number of remote Modbus slave. For this I would like to create an "object" (FB or others... whatever) MBslave and instantiate it several times. I can realize this graphically (in the device tree in codesys) by creating under "Ethernet" a "Modbus_Master" module and then under that create all the Modbus_Slave modules. But for reasons of maintenance I want to realize this "by hand". Is this possible? I have already declared variables of type "ModbusTCPSlave" inserts ports, IP addresses, etc. But I am suck on mapping I/O?
Any information is very welcome! ;) Thanks.
Last edit: valeria 2021-07-20
give this example a look:
https://forge.codesys.com/prj/codesys-example/modbus/home/Home/
Wow! Sound good :) I have a look. Thanks
Again, thanks for the link.
I had a look at this example, understood the global idea and made a super very simple test : instance one object "clientTcp: ModbusFB.ClientTcp;"
The library ModbusFB was download "automatically" via Library Manager.
When I instance the object "clientTcp: ModbusFB.ClientTcp;" , I have no red underlined and when I compile the code get a bunch of errors relative to the ModbusFB library. For example "Unknown type: SysComSettings" and when I look through the ModbusFB library I just cannot find this method.
It looks to me that the ModbusFB library seems to be the wrong one or some dependencies are missing.
Any suggestion?
Last edit: valeria 2021-07-21