RS-485 is upper compatible with RS-422. In general, RS-422 devices mainly use 4-wire connection method, while RS-485 dev

We recommend you use an unmanaged switch, without B.S protection that is an industrial hub fulfilling the conditions of

The following loader software, connection cable, and converter are required. 1) Loader software ・NP4H-SWN The pr

Yes, you can use NP1L-RS1/RS4/RS5 for RS-422 devices. RS-485 is upper compatible with RS-422. There are two connection t

You can install the SPF series main unit and each expansion unit without space between them.

The following are necessary. 1) Hardware: General-purpose communication module (NP1L-RS1/RS2/RS3/RS4/RS5) whose fi

Yes, they are. The maximum size is 32 words including the actual data, start code, end code, and BCC. (The same applies

No, you can't. The relationship between i, which is the sensor output current, and i1 and i2, which are the CH input cu

The takt cycle monitoring error is caused by the following factors_ (1) The preset takt cycle value specified in the sys

The IP address of the Ethernet module will become effective when the power supply is turned off once and then turned on

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GLOBAL > PLC

Latest FAQ

I creat user FB in StandardV3, and defined input/output parameter as word (WV). Can I directly access any bit within this parameter WV?
When I write parameter to LonWorks module (NP1L-LW1) using support tool for a LonWorks (NP4N-LNDF), what is the required cable?
When I set the high-speed counter module (NP1F-HC2) to the preset operation mode of the multi-functional counter FB, the preset is disabled in the ...
We share the D300win and other PLC engineering tool software among several people. Do we need to purchase the software for each person?
Are there any restrictions on the mounting position of the I/O modules and communication modules on the base? I'd like to place the communication m...

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FAQ within [ PLC ]

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What is the difference between RS-485 and RS-422 ?

RS-485 is upper compatible with RS-422. In general, RS-422 devices mainly use 4-wire connection method, while RS-485 devices mainly use 2-wire connection met... Show Detail
- No：1521
- Displayed Date：2023/04/25 19:00
- Category： Communication (Others)
Can I use a commercially available hub for FL-net modules?

We recommend you use an unmanaged switch, without B.S protection that is an industrial hub fulfilling the conditions of use for FL-net. * What is 'B.S'?... Show Detail
- No：1465
- Displayed Date：2023/04/25 19:00
- Updated DTM：2023/06/09 13:28
- Category： Communication (Others)
I would like to read and write programs of the FLEX-PC series (NS, NJ, NB) on a personal computer (Windows 10). What loader software and connection...

The following loader software, connection cable, and converter are required. 1) Loader software ・NP4H-SWN The product CD of NP4H-SWN includes the ... Show Detail
- No：1452
- Displayed Date：2023/04/25 19:00
- Updated DTM：2023/06/09 13:22
- Category： Support tool (Others)
NP1L-RS1/RS4/RS5 support RS-485. Can I use them for RS-422 devices?

Yes, you can use NP1L-RS1/RS4/RS5 for RS-422 devices. RS-485 is upper compatible with RS-422. There are two connection types for RS-422 devices: 2-wire conne... Show Detail
- No：1522
- Displayed Date：2023/04/25 19:00
- Category： Communication (Others)
How much space is necessary between the SPF series main unit and each expansion unit?

You can install the SPF series main unit and each expansion unit without space between them. Show Detail
- No：1517
- Displayed Date：2023/04/25 19:00
- Category： Main unit
What is necessary for MODBUS_RTU communication between SPH and an external device?

The following are necessary. 1) Hardware: General-purpose communication module (NP1L-RS1/RS2/RS3/RS4/RS5) whose firmware version is V42 or later ... Show Detail
- No：1469
- Displayed Date：2023/04/25 19:00
- Updated DTM：2023/06/09 13:29
- Category： Communication (Others)
When using Cfr32, are the start code, end code, and BCC included in the maximum data size?

Yes, they are. The maximum size is 32 words including the actual data, start code, end code, and BCC. (The same applies to _Cfr64, _Cfr128, _Cfr252, and _Cfr... Show Detail
- No：1495
- Displayed Date：2023/04/25 19:00
- Category： Communication (Others)
I will use the analog current input module. Can I input a single input signal to two CHs of the module simultaneously (in parallel) to use them?

No, you can't. The relationship between i, which is the sensor output current, and i1 and i2, which are the CH input currents of the PLC, is expressed as i ... Show Detail
- No：1603
- Displayed Date：2023/04/25 19:00
- Category： I/O
A nonfatal fault of the takt cycle monitoring error has occurred. What is a possible cause?

The takt cycle monitoring error is caused by the following factors_ (1) The preset takt cycle value specified in the system definition is shorter than the ac... Show Detail
- No：1576
- Displayed Date：2023/04/25 19:00
- Category： Error
The D300win cannot connect to the SX via the Ethernet module.

The IP address of the Ethernet module will become effective when the power supply is turned off once and then turned on again after the module driver is dow... Show Detail
- No：1434
- Displayed Date：2023/04/25 19:00
- Category： Communication (Ethernet)