Hardware - Wago I/O Modules
Wago I/O Modules
Wago provides stackable Input/Output modules for the 750-series buscouplers. These I/O modules are interchangeable between buscouplers in the 750-series product range; Modbus, CAN, PFC 200 and more. For more information about the details of each specific Wago I/O module, please consult the Wago website, and do a search for the specific module.
Wago 750-series
CDP Studio ModbusIO supports most of the 750-xxxx analog and digital modules for the 750 Series, using the standard (non-complex) process-data image. To see which specific modules are supported, drag in a Wago-750-UDP from the ModbusIO Resource tree, click on it and enter into the IO packet. The WagoIOModules resource should expand and show all the available modules that are supported.
The Wago 750-series buscouplers are typically set up with DHCP or DIP-switches. A network scanner tool, such as Angry IP Scanner, can also be used to find the IP address of the buscoupler. See the documentation for the specific Wago buscoupler for more information on configuring the IP address. To access the web-interface for the buscoupler, type in the IP address into a web-browser. Log in with default user=admin, password=wago (without the quotes). From there it should be possible to set the IP address, watchdog functionality and other options. For some functions, such as setting up some IO modules, the Wago-IO-Check tool, or the e!COCKPIT tool must be used.
The Wago 750 Series accepts reads from modbus address 0, and writes from modbus address 0x0 (Note that the buscoupler distinguishes between read and write so that read adress 0 is separate from write address 0).
Note: Whenever I/O modules are changed, added or removed from the buscoupler, make sure to go into the web-interface for the buscoupler. In the Navigation pane, click on IO config and if present, click create ea-config.xml or similar. Wait some seconds, then power-cycle the buscoupler. Failing to recreate the ea-config xml for the buscouplers that use this will result in communication not working correctly.
Note: Make sure to adjust / set the correct FunctionCode in the modbus packet as follows, or there will be communication problems:
- If you only Read from a device, use ReadHoldingRegisters.
- If you only write to a device, use WriteMultipleRegisters
- If you both read and write a device, use ReadWriteMultipleRegisters.
It is possible to add more packets to exchange more data with the buscoupler. See the Wago documentation for the specific buscoupler for more information about which modbus addresses can be accessed.
Note: For more information about CDP Technologies partnerships, see Our Partners and for detailed information on the Wago Corporation, see the Wago website for more information.
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