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

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

Yes, it is generally possible. However, be sure to use compensating leads also for wiring to the recorder. Some recorde

The input/output data continue to be valid after the CPU is switched. (The previous values are retained.)

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

Only open-collector (single-ended) signals are accepted. (NP1F-HC2 accepts differential signals.) The rated current is

If the CPU modules are mounted on a hot plug base board with station No. setup function, you can replace them without tu

Turn off the write-protect switch of the user ROM card, mount it on the CPU module and transfer a program to write it to

Usually, set the CPU No. to 0. The CPU No. 0 works as a master of an SX bus system. In a multi-CPU system or a CPU redu

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

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GLOBAL > PLC > SPH

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 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 ...
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...
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...
When I attempted to download a project to a CPU with user ROM card by using D300win, a message appeared saying 'Invalid loader command process!' an...

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FAQ within [ SPH ]

221-230 of Total 235

≪ 23 / 24page ≫

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
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
- Category： Communication (Others)
Is it possible to connect a recorder in parallel with signal input terminals of the thermocouple input module?

Yes, it is generally possible. However, be sure to use compensating leads also for wiring to the recorder. Some recorders may not permit connection dependi... Show Detail
- No：1420
- Displayed Date：2023/04/25 19:00
- Category： I/O
In a redundant system, are the previous values retained for the SX bus and T-link outputs when the CPU is switched?

The input/output data continue to be valid after the CPU is switched. (The previous values are retained.) Show Detail
- No：1408
- Displayed Date：2023/04/25 19:00
- Category： Application
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
- Category： Communication (Others)
Is it possible to count differential input pulses using a high-speed digital input module (Type_ NP1X3206-A)?

Only open-collector (single-ended) signals are accepted. (NP1F-HC2 accepts differential signals.) The rated current is 40 mA and an encoder that permits t... Show Detail
- No：1373
- Displayed Date：2023/04/25 19:00
- Updated DTM：2023/06/13 15:43
- Category： Function
When redundant CPUs mounted on the same base board break down, can I replace the CPU without turning off the power?

If the CPU modules are mounted on a hot plug base board with station No. setup function, you can replace them without turning off the power. Show Detail
- No：1367
- Displayed Date：2023/04/25 19:00
- Category： Main unit
How can I write to the user ROM card of a standard CPU?

Turn off the write-protect switch of the user ROM card, mount it on the CPU module and transfer a program to write it to the user ROM card. Show Detail
- No：1344
- Displayed Date：2023/04/25 19:00
- Category： Main unit
A CPU module has a rotary switch (0 to F) for setting the CPU No. on its front. What CPU No. should I set?

Usually, set the CPU No. to 0. The CPU No. 0 works as a master of an SX bus system. In a multi-CPU system or a CPU redundant system which uses multiple CPU ... Show Detail
- No：1504
- 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)