Case Study
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 […]
Replacement of OMRON C-type PLC
This is an example of PLC replacement for equipment used in a food factory in Saitama Prefecture. We replaced OMRON C-type PLC C28P with CP series PLC CP1E. Obtained a paper-based copy of the C28P ladder before it was replaced. The OMRON C28P PLC before the replacement was not equipped with a cable for ladder […]
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, […]
Fuji Electric PLC MICREX-F Series Ladder data backup
We received a request from a company operating plating-related equipment in Tokyo to back up the ladder data of an old Fuji Electric PLC.The PLC model is Fuji Electric MICREX-F series FPU 080A-A10, which is aging due to the plating environment, and they are considering replacing it with MICREX-SX series in the future. Prepare programming […]
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 […]