How to connect the paperless recorder with the computer?

Several questions that customers like to ask: Can your paperless recorder be connected to a computer? How can a paperless recorder be connected to a computer? And so on many questions about the connection of paperless recorder to computer, here is a brief introduction based on these questions.

In the past, most paperless recorders used serial ports to communicate with computers, but now most computers don't have serial ports, so now paperless recorders mostly use Ethernet interfaces to communicate with computers. Simply put, it is to connect with the computer through RS232 or RS485 communication, because the computer only has RS232 interface or USB interface, so if the instrument is equipped with RS232 interface, it can be directly connected with the desktop computer, or it is very convenient to buy an RS232-to-USB interface and connect with the notebook. Importantly, RS485 communication has been widely used in various industrial life because of its long transmission distance.

1. RS-232 communication paperless recorder connected to computer

RS232 communication is convenient. This interface can realize point-to-point communication, and it is directly connected by 9-pin COM cable. However, this method cannot realize networking function. The popular saying is that a PC can only connect a paperless recorder with RS232 communication interface for communication, but the communication distance is short, which is generally less than 5 meters in practical application. If it is too long, the signal will be intermittent or the packet loss will be serious, so it is not recommended.

Paperless recorder

2. RS-485 communication paperless recorder connected to computer

RS485 is widely used because of its long communication distance. When connecting, a communication converter can be used to convert RS485 to USB interface. Its maximum communication distance is about 1219m, the maximum transmission rate is 10Mbps, and the transmission rate is inversely proportional to the transmission distance. Only at the transmission rate of 100KbpS can it reach the maximum communication distance. If it needs to transmit a longer distance, it needs to add 485 repeaters.

Therefore, after knowing these basic principles, it is up to your own needs and specific circumstances to choose which access communication method to choose.

What are the common faults of paperless recorder?

As the saying goes, even the best machine will break down when it is used for a long time, and paperless recorder is no exception. Paperless recorder is an instrument that can convert temperature and pressure into current, voltage, thermocouple, thermal resistance and other signals through the transmitter, and can provide functions such as transmission, communication, printing, alarm, power distribution and output, and record and process data.

When we use the paperless recorder in our life, it is normal that the equipment has problems due to too long use or careless abnormal operation, so we don't have to be too alarmed and at a loss.

Let's take a look at the common faults and solutions when using paperless recorder:

1, change the channel signal value size, channel display value without any change solution:

1.1 Use a multimeter to measure whether the signal is normal on the terminal;

1.2 Check whether the switch and signal type of the channel module are set correctly;

1.3 Open the case and check whether the channel signal cable is connected properly;

Paperless recorder

2. The solution that the paperless recorder doesn't work after being powered on:

2.1 check whether the wiring of the 220V power supply terminal of the instrument is correct;

2.2 check whether the instrument fuse is blown;

2.3 Unscrew the fixing screw behind the instrument, pull the watch core out from the front, and check whether the cable of the power board is plugged with the motherboard;

3. The solution of LCD with bright back but no character and curve display:

Check whether the instrument display cable is connected normally;

Paperless recorder

4, channel measurement value is not allowed, channel display value without any change solution:

4.1 Check whether the signal type setting is consistent with the actual access signal type in the channel parameter setting;

4.2 Whether the switch setting of the channel module is consistent with the call signal type;

4.3 Check whether the signal wiring is accurate and whether the signal cable is in good contact;

4.4 After confirming that there are no problems mentioned above, the paperless recorder shall recalibrate the instrument (note that the accuracy of signal source must be higher than 0.1%). If the instrument calibration is abnormal (unable to calibrate), or the calibration is normal but the channel measurement is still abnormal, please contact the relevant technicians of the manufacturer as soon as possible.

Of course, we don't have to panic when we encounter some unexpected situations when using this kind of equipment, even if we are not professional repairmen, we can solve the problem better and faster.

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