Yes, a CPU is necessary. In the case of a system with no CPU, the input status LED does not work even if signals are ext

When the P-link module is specified as 'unimplemented' and no P-link module exists in the system, attempting to access t

One possible cause is that common FB _C_COM is not registered with the library. For communication-related expansion F

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

The SX-Programmer Expert supports MODBUS communication (master function) using an FB. Communication with a MODBUS sla

It is the same as the loader mode (mode switch 3) of the general-purpose communication module (Type_ NP1L-RS1/RS2/RS3/RS

It occurs when any of the overrun, parity and framing errors is detected in the serial port of a general-purpose communi

They are retained. Note, however, that they are cleared if the power of the FL-net module is turned off.

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

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

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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) ]

21-30 of Total 53

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Is a CPU necessary to check I/O? Input signals to the input terminals of an input module are turned ON, however, the input status LED remains OFF.

Yes, a CPU is necessary. In the case of a system with no CPU, the input status LED does not work even if signals are externally input into the input module. Show Detail
- No：1537
- Displayed Date：2023/04/25 19:00
In an SPH system, I specified the P-link module as 'unimplemented' and the program execution time was extended. Why?

When the P-link module is specified as 'unimplemented' and no P-link module exists in the system, attempting to access the P-link memory using a contact, coi... Show Detail
- No：1355
- Displayed Date：2023/04/25 19:00
With D300win, I used a non-procedural FB (_C_free) in a program for compilation and an error occurred. What is the cause of this problem?

One possible cause is that common FB _C_COM is not registered with the library. For communication-related expansion FBs including _C_FREE, register common... Show Detail
- No：1329
- Displayed Date：2023/04/25 19:00
- Updated DTM：2023/06/13 15:32
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
Does an RS-485 communication module (Type_ NP1L-RS1/RS4/RS5, etc.) support the MODBUS procedure?

The SX-Programmer Expert supports MODBUS communication (master function) using an FB. Communication with a MODBUS slave device is possible by using SPH_CP... Show Detail
- No：1380
- Displayed Date：2023/04/25 19:00
- Updated DTM：2023/06/13 15:45
What is the communication protocol for the loader port of the CPU module of the MICREX-SX SPH Series?

It is the same as the loader mode (mode switch 3) of the general-purpose communication module (Type_ NP1L-RS1/RS2/RS3/RS4/RS5). Show Detail
- No：1379
- Displayed Date：2023/04/25 19:00
With the general-purpose communication module (Type_ NP1L-RS□), in what cases does 'C0_ Hardware error detected during receiving' occur?

It occurs when any of the overrun, parity and framing errors is detected in the serial port of a general-purpose communication module. Show Detail
- No：1328
- Displayed Date：2023/04/25 19:00
When the communication cable is disconnected with an FL-net module (Type_ NP1L-FL1/FL2/FL3), are the FL-net common memory data retained? Or are the...

They are retained. Note, however, that they are cleared if the power of the FL-net module is turned off. Show Detail
- No：1405
- 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
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

21-30 of Total 53

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