Database function of the MELSEC iQ-R series

You can manage tabular data including product information and production information as a database in a programmable controller. By accessing the database w... More Details >>

Difference between Q61P and Q64PN

There are differences in 5 VDC rated output current and in 5 VDC overcurrent protection.The difference in 5 VDC rated output current is as follows.- Q61P: 6 ... More Details >>

Difference between C Controller module and programmable controller CPU module

- C Controller module: Programs are created using C and C++ languages. The programs run based on each task and parallel processing of multiple tasks base... More Details >>

Using the automatic communication function and dedicated instructions at the same time in MODBUS (R) interface module (QJ71MB91)

The automatic communication function and dedicated instructions (MBRW instruction and MBREQ instruction) can be used on the same channel. However, when the... More Details >>

Boot operation from the standard ROM in the universal model QCPU

The universal model QCPU modules have their standard ROM but boot operation from the standard ROM is impossible. Boot the module from a memory card. More Details >>

Reading file registers simultaneously with the program, parameters, and other data in GX Works2

No. Switch the target memory for PLC Data and read the file registers alone. More Details >>

Cost of runtime licenses for VxWorks

The cost is included in the price of C Controller modules. Extra payment is not required. More Details >>

Recommended cables for the MODBUS(R) interface module QJ71MT91

For 100BASE-TX, shielded twisted pair cables (STP cables) with category 5 can be used.For 10BASE-T, Straight and unshielded twisted pair cables (UTP cables) ... More Details >>

Execution in a multi task environment

The QBF_Open ( ) function or mdOpen ( ) function is required for every task. Do not share the PATH acquired using an Open function with other tasks.Also, exe... More Details >>

Input derating

Input derating is the percentage of simultaneous ON points, one of the specifications applied when input modules are used. When QX42 is used in a temperatur... More Details >>