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

When connected via 10BASE-T, you can replace it. There is no need to change the system definition. Before replacement, s

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

You can access the memory from a PC by setting the general-purpose communication module (Type_ NP1L-RS2) to 'Loader' mod

Use an optical fiber cable (Type 2-C-LAP) provided by Sumitomo Electric Industries, Ltd.

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

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

It is full duplex for both hardware and software (firmware) for anything other than communication by M_RECEIVE and M_SEN

When the common memory system is used, this can be achieved by handshaking with an application using part of the link me

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

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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
Can I replace NP1L-FL2 with NP1L-FL3 for FL-net communication?

When connected via 10BASE-T, you can replace it. There is no need to change the system definition. Before replacement, set the switches on the front of the N... Show Detail
- No：1524
- 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
I want to access the data memory in the MICREX-SX CPU from a PC via the RS-232C port of the general-purpose communication module. (Data read/write)

You can access the memory from a PC by setting the general-purpose communication module (Type_ NP1L-RS2) to 'Loader' mode. Various loader commands have been... Show Detail
- No：1615
- Displayed Date：2023/04/25 19:00
Which optical fiber cable for an SX bus should I choose for outdoor use?

Use an optical fiber cable (Type 2-C-LAP) provided by Sumitomo Electric Industries, Ltd. Show Detail
- No：1315
- Displayed Date：2023/04/25 19:00
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
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
With a general-purpose communication module, is RS232C completely full duplex?

It is full duplex for both hardware and software (firmware) for anything other than communication by M_RECEIVE and M_SEND on the SX bus, which are FB interna... Show Detail
- No：1413
- Displayed Date：2023/04/25 19:00
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?

When the common memory system is used, this can be achieved by handshaking with an application using part of the link memory. Without handshaking, it is not... Show Detail
- No：1638
- 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