Both loggers can export data to databases or log to a file, and many other formats. It was designed to operate in the 24x7 mode. Confirm the wires from the gateway are connected to the USB dongle as per the following image. This logger can poll and read data from MODBUS TCP devices using the MODBUS/TCP plugin. If there is a communication error, you will see show in the log toward the bottom of the window.
#Modbus poll log how to#
For a Modbus data source the library chooses how to bundle the requests for the registers. These are the exact messages that are being sent. The I/O Log contains the raw data coming in (I) and going out (O) of the data source.
#Modbus poll log simulator#
Also, there is a Modbus Poll which is a simulator used by developers to ascertain the efficiency of a Modbus protocol. If you were to choose a poll period of 5s then the next poll will be aborted if the device is timing out. Total kWh / kVarh equals to Import + export. The power sum demand calculation is for import export. Positive refers to forward current, negative refers to reverse current.
#Modbus poll log serial#
The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. Modbus Poll is described as 'Modbus master simulator designed primarily to help developers of Modbus slave devices or others that want to test and simulate the Modbus protocol. To check the gateway’s communication response with the Serial Modbus Gateway Utility: select Gateway Commands > Check Wireless State. Modbus comes in several variants/versions depending on the type of serial port or even Ethernet: Modbus RTU, Modbus TCP/IP, Modbus RS485, Modbus ASCII, and Modbus UDP/IP among others. The power factor has its sign adjusted to indicate the direction of the current. I suggest you do a search for Modbus TCP/IP to serialgateway (there's plenty of them available from various suppliers) and give it a try instead. The "conversion" froma Modbus TCP/IPto serial message and vice versa does as such need to be managed by the gateway and a simple Ethernet to serial converteris not capable of doing so. I fear your ATC1000 is just a "dumb" Ethernet to serial converter instead of a Modbus TCP/IP to Modbusserial converter which would explain your problem.Įven though Modbus on TCP/IPis essentially based on encapsulating a Modbus RTU message inside a TCP/IPframe, it doesso by stripping away the Address and CRC from the Modbus serial message and adds the so calledMODBUS Application Protocol header (MBAP) to it to create the Mdobus TCP/IP message (see for all the gory details on this).
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