The built-in Ethernet port in the L series is compatible only with the QnA-compatible 3E frame. The 4E frame is not supp

The contents of the standard RAM and latch devices are not erased if the battery replacement is completed within three m

This problem occurs because the consecutive free memory space for temporarily storing the program during online change i

If preset initial values are used, parameters do not need setting.If changing the basic parameter or MODBUS(R) device as

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

SD520 stores the current scan time in 1 ms units.

Although it depends on interrupt factors, the overhead time before startup becomes 10.8 to 23.8 [us] and the time after

The execution time of the basic opeartion instruction (LD) of the FX5U/FX5UC/FX5UJ CPU module is 34 ns. *For firmware Ve

It is not possible to connect multiple devices with different communication speeds and parities.

The control response parameter can set the response to the target value (SV) of PID control as either "normal" or "fast"

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Programmable Controllers MELSEC

MELSEC iQ-R Series(45)
MELSEC iQ-F Series(672)

CPU Module(185)
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FAQ within [ Programmable Controllers MELSEC ]

401-410 of Total 1023

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Use of 4E frame for built-in Ethernet port of LCPU

The built-in Ethernet port in the L series is compatible only with the QnA-compatible 3E frame. The 4E frame is not supported. More Details >>
- No：22761
- Release Date：2018/09/03 17:30
- Category： MELSEC-L Series
Battery replacement for LCPU

The contents of the standard RAM and latch devices are not erased if the battery replacement is completed within three minutes, which is the backup power tim... More Details >>
- No：22733
- Release Date：2018/09/03 17:29
- Category： MELSEC-L Series
When a message indicating that "the memory space is insufficient" appears during online change

This problem occurs because the consecutive free memory space for temporarily storing the program during online change is insufficient. In this case, perform... More Details >>
- No：22722
- Release Date：2018/09/03 17:29
- Category： MELSEC-Q Series
Parameter settings required to use the MODBUS(R) interface module as a slave station

If preset initial values are used, parameters do not need setting.If changing the basic parameter or MODBUS(R) device assignment parameter, use a sequence pr... More Details >>
- No：22680
- Release Date：2018/09/03 17:29
- Category： MELSEC-Q Series
Cost of runtime licenses for VxWorks

The cost is included in the price of C Controller modules. Extra payment is not required. More Details >>
- No：22653
- Release Date：2018/09/03 17:29
- Category： MELSEC-Q Series
How to check scan time

SD520 stores the current scan time in 1 ms units. More Details >>
- No：22556
- Release Date：2018/09/03 17:29
- Category： MELSEC-Q Series
Overhead time before and after the startup of an interrupt program with a MELSEC iQ-R series CPU module

Although it depends on interrupt factors, the overhead time before startup becomes 10.8 to 23.8 [us] and the time after startup becomes 6.5 to 17.4 [us]. More Details >>
- No：22499
- Release Date：2018/09/03 17:28
- Update：2018/09/20 12:14
- Category： MELSEC iQ-R Series
Regarding the processing specification of the basic operation instruction(LD).

The execution time of the basic opeartion instruction (LD) of the FX5U/FX5UC/FX5UJ CPU module is 34 ns. *For firmware Ver.1.100 or above, this specification ... More Details >>
- No：22287
- Release Date：2018/08/30 13:55
- Update：2023/07/03 11:56
- Category： MELSEC iQ-F Series , CPU Module
Regarding protocol mixing in Serial Communication

It is not possible to connect multiple devices with different communication speeds and parities. More Details >>
- No：45480
- Release Date：2025/11/12 13:54
- Category： MELSEC iQ-F Series , CPU Module , Network/Communication
Regarding Control response parameter of built-in PID Control of CPU Module

The control response parameter can set the response to the target value (SV) of PID control as either "normal" or "fast". The difference is as follows. (1)W... More Details >>
- No：44653
- Release Date：2025/03/18 10:23
- Category： MELSEC iQ-F Series , CPU Module , Analog

401-410 of Total 1023

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