PID control of heater with keyence PLC
When performing temperature control of the heater, it is common to use a dedicated temperature controller (such as E5CC), but if the heater to control increases, it is also necessary to have a temperature controller, and it is also very difficult to arrange it on the board. It becomes. This time, we will introduce how […]
Mitsubishi PLC GX Configurator-SC RS-232C unsynchronous data transfer with protocol communication.
When performing protocol communication with a partner device such as a barcode reader using the unsynchronous data transfer of the serial communication unit of a Mitsubishi Q series PLC, it was necessary to create a ladder program for all communication processing.Using the communication protocol support function of GX Configurator-SC, you can register the protocol for […]
PLC Remote Maintenance Test  Monitor and change the program of a PLC at a remote location.
When it becomes necessary to monitor the PLC programs of facilities and equipment installed in remote locations, or to investigate the programs, it is usually necessary to visit the site to take action, but due to the current impact of the new coronavirus infection, it may become difficult to visit in the future.Remote work is […]
The "MODE" and "RUN" lamps of the Mitsubishi PLC Q series CPUs turn off and do not operate
Have you ever been in a hurry because the "MODE" and "RUN" lamps of the CPU unit did not light up when you turned on the power of the PLC? Why the "MODE" lamp of the CPU unit does not light up on a Q-series PLC According to the Q CPU User's Manual (Hardware Design, […]
Simple CPU communication by Ethernet connection between Mitsubishi Q PLC and FX PLC
The data communication method between Mitsubishi's Q series PLC and FX series PLC is simple CPU communication by Ethernet connection. What is simple CPU communication? It is a function that allows Ethernet-connected PLCs to communicate with each other and send/receive device data without programming, with just a simple setting using GX Works2 or 3. Example […]
Control RS232C devices from PLC via Ethernet communication
To control RS232C-equipped devices with a PLC, a serial communication unit is required, and there are some limitations such as one-to-one communication to the port, and the communication distance is usually less than 15m. The RS232C-Ethernet converter enables 1-to-n communication with multiple RS232C-equipped devices at a distance of 100m from the PLC's built-in Ethernet port […]