Connect the ComfileHMI's RS-232 port to the MSB's RS-232 port as illustrated below. (The CUBLOC's built-in Modbus slave can only be used on the CUBLOC's serial channel 1.)
Connect the ComfileHMI's RS-232 port to the CUSB's RS-232 port as illustrated below.
The CUBLOC's 5V-level serial port must first be connected to a level shifter like the MAX232 to match the ComfileHMI's +/- 12V-level serial port. Some CUBLOC core modules already have a MAX232 built-in.
When creating a new project, select the COMFILE and CUBLOC MODBUS RTU protocols.
The ComfileHMI's RS-485 port can be connected to the CUBLOC's serial channel 1 through an RS-232 to RS-485 converter.
Please use CUBLOC Studio v4.0 or later. The following source code is a minimal Modbus slave implementation.
#include "MSB6XX" ' MSB6XX Series device declaration. ' Core modules would use a declaration like Const Device = CB280 Opencom 1,115200,3,200,200 ' Channel 115200bps,8 data bits, no parity, 1 stop bit Set Modbus 1,1,100 ' Modbus RTU, slave address 1, frame delay 100 (approx. 10mS) Set Ladder On ' Start the ladder scan Do ' Main loop Loop
Ladder Logic must have at least one
ComfileHMI Sample Project ⇐ Download the ComfileHMI sample project
MSB Source Code ⇐ Download the Cubloc Studio/MSB Logic project files for the source code listed below.
#include "MSB6XX" Opencom 1,115200,3,200,200 Set Modbus 1,1,100 Usepin 8,In Usepin 20,In Usepin 32,Out Usepin 33,Out Usepin 34,Out Usepin 35,Out Set Ladder On Do Delay 1000 Incr _D(1) Loop
Accompanying Ladder Logic source.