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

R_STS = 1 means 'send buffer overflow' detected by the general-purpose communication module. Check the communication for

The bus can be extended with the SX bus electrical repeater (Type_ NP2L-RP1). Up to three repeaters can be used in one

Yes, it is possible. Of the parameter setting items of initialization, changes made to specific parameter items (such as

You don't need a dedicated cable. Since the parameters will be set via the CPU module, you need a loader cable for the

The received data is cleared to 0. Therefore, be sure not to read (ignore) the data by application program. Reopening th

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

In MICREX-SX, a scan list is automatically created by registering the remote I/O to be connected to the master module in

The number of M_OPEN FBs that can be opened simultaneously is limited to 56. The number of FBs that can be simultaneousl

Common memory 1 and common memory 2 are handled together in terms of timing. However, to maintain the uniqueness of data

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GLOBAL > PLC > SPH > Communication (Others)

Latest FAQ

When I write parameter to LonWorks module (NP1L-LW1) using support tool for a LonWorks (NP4N-LNDF), what is the required cable?
When using a communication module (NP1L-RS1/RS2/RS3/RS4/RS), the FB outputs R_STS 'C0' (Hardware error detected) during receiving. In this case, ho...
I use DeviceNet interface module (NP1L-RD1) under DeviceNet master (NP1L-DN1). How can I specify NP1L-RD1 in the system definition?
In the communication module (NP1L-RS1/RS2/RS3/RS4/RS5), is it possible to change communication parameter such as fixed length to variable length af...
With the FL-net module (NP1L-FL1/FL2/FL3), is there any way to confirm that the data sent from the node-A have actually been received by the node-B?

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FAQ within [ Communication (Others) ]

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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
When the MODBUS master standard expansion FB _C_modm operates, the receive status becomes R_STS = 1. This is not shown in the receive status list. ...

R_STS = 1 means 'send buffer overflow' detected by the general-purpose communication module. Check the communication format, communication interval and other... Show Detail
- No：1607
- Displayed Date：2023/04/25 19:00
The total extension of the SX bus has exceeded 25 m. Is there anything to relay the connection?

The bus can be extended with the SX bus electrical repeater (Type_ NP2L-RP1). Up to three repeaters can be used in one system. (When three repeaters are us... Show Detail
- No：1550
- Displayed Date：2023/04/25 19:00
In the communication module (NP1L-RS1/RS2/RS3/RS4/RS5), is it possible to change communication parameter such as fixed length to variable length af...

Yes, it is possible. Of the parameter setting items of initialization, changes made to specific parameter items (such as frame detection, code conversion and... Show Detail
- No：1639
- Displayed Date：2023/04/25 19:00
When I write parameter to LonWorks module (NP1L-LW1) using support tool for a LonWorks (NP4N-LNDF), what is the required cable?

You don't need a dedicated cable. Since the parameters will be set via the CPU module, you need a loader cable for the PLC and the program loader software. Show Detail
- No：1676
- Displayed Date：2023/04/25 19:00
When using a communication module (NP1L-RS1/RS2/RS3/RS4/RS), the FB outputs R_STS 'C0' (Hardware error detected) during receiving. In this case, ho...

The received data is cleared to 0. Therefore, be sure not to read (ignore) the data by application program. Reopening the FB (turning the 'OPEN' terminal fro... Show Detail
- No：1672
- Displayed Date：2023/04/25 19:00
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
With the DeviceNet master module (Type_ NP1L-DN1), how can I create a scan list and register it with the master module?

In MICREX-SX, a scan list is automatically created by registering the remote I/O to be connected to the master module in the system configuration definitions... Show Detail
- No：1346
- Displayed Date：2023/04/25 19:00
- Updated DTM：2023/06/13 15:35
Is there any limitation on the number of M_OPENs to be executed simultaneously? If there is a limitation, what is the maximum number?

The number of M_OPEN FBs that can be opened simultaneously is limited to 56. The number of FBs that can be simultaneously opened for each module depends on t... Show Detail
- No：1435
- Displayed Date：2023/04/25 19:00
With the common memory of FL-net, I set word data with common memory 2 and bit data with common memory 1. Please describe the timing of transmissio...

Common memory 1 and common memory 2 are handled together in terms of timing. However, to maintain the uniqueness of data including those in common memory 1 a... Show Detail
- No：1311
- Displayed Date：2023/04/25 19:00