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N4IOA01 FAQ
I have the N4IOA01 DC 12V 24V RS485 To 4-20MA 0-20MA Current Signal Generator PWM To Current Analog Converter Modbus RTU 03 06 DAC Module. Why is the command to set a new current 01 06 00 00 01 90 88 36 at the time of receiving/transmitting via RS485, the current drops to 10-20% (3.2, 3.4, 3.4, ... 4.0). What can be done to prevent this from happening? It is impossible to reduce the receiving/transmitting time, because the maximum exchange rate is 19200. It is also impossible to cancel the response to the command, because there is no broadcast command at address 0. Help me to solve the problem I have 4 of them. I wanted to buy more, but I need to solve this problem. Eletechsup : N4IOA01 is a low-cost slow RS485 To 4-20MA 0-20MA current signal generator. Please lengthen the sending interval. For example, change the current value once...
N4IOA01 FAQ
I have the N4IOA01 DC 12V 24V RS485 To 4-20MA 0-20MA Current Signal Generator PWM To Current Analog Converter Modbus RTU 03 06 DAC Module. Why is the command to set a new current 01 06 00 00 01 90 88 36 at the time of receiving/transmitting via RS485, the current drops to 10-20% (3.2, 3.4, 3.4, ... 4.0). What can be done to prevent this from happening? It is impossible to reduce the receiving/transmitting time, because the maximum exchange rate is 19200. It is also impossible to cancel the response to the command, because there is no broadcast command at address 0. Help me to solve the problem I have 4 of them. I wanted to buy more, but I need to solve this problem. Eletechsup : N4IOA01 is a low-cost slow RS485 To 4-20MA 0-20MA current signal generator. Please lengthen the sending interval. For example, change the current value once...
UD23A08 FAQ
Customer : I bought a UD23A08 8 Channel USB COM Serial Port UART Relay Board on aliexpress (order Nr 3051804136187061) and I am trying to communicate with it. Unfortunately, I am not able to find any protocol specification neither for AT commands or 8 bytes commands neither serial port configuration (I believe 115200 baud rate)....
UD23A08 FAQ
Customer : I bought a UD23A08 8 Channel USB COM Serial Port UART Relay Board on aliexpress (order Nr 3051804136187061) and I am trying to communicate with it. Unfortunately, I am not able to find any protocol specification neither for AT commands or 8 bytes commands neither serial port configuration (I believe 115200 baud rate)....
RT38B01 FAQ
Customer : Hello. I just bought 5 pieces of RT38B01 to use with my PTZ Cameras. I would you to confirm that my connection is correct since so far there is no transmission. TRANSMISSION 1. PTZ Software Control Software 2. Waveshare RS485-USB Converter 3. RT38B01 (terminal + and - RECEIVE 4. RT38B01 (terminal + and -) 5. PTZ Camera The cameras are not responding. Could it be that my connection is wrong? Could it be that the transceivers need power through a third cable? Eletechsup : The vin gnd interface is not connected to the power supply....
RT38B01 FAQ
Customer : Hello. I just bought 5 pieces of RT38B01 to use with my PTZ Cameras. I would you to confirm that my connection is correct since so far there is no transmission. TRANSMISSION 1. PTZ Software Control Software 2. Waveshare RS485-USB Converter 3. RT38B01 (terminal + and - RECEIVE 4. RT38B01 (terminal + and -) 5. PTZ Camera The cameras are not responding. Could it be that my connection is wrong? Could it be that the transceivers need power through a third cable? Eletechsup : The vin gnd interface is not connected to the power supply....
R4DCB08 FAQ
Customer : Hello Rachel, I would like to ask for your help and would be very grateful if you have a solution... I have several R4DCB08 modules from you here. They work wonderfully and are used successfully in some projects. Now there's a problem where I think you, as developers, probably have a solution or know other people who have the knowledge. Feel free to forward my email to anyone else who might be able to help me. Thanks in advance! But now to the problem! Reading positive temperatures is no problem. But reading temperatures equal to or less problematic. Do you have an example with an Arduino UNO, MEGA, how to solve the problem? I've attached the file for the Arduino UNO/MEGA with further information. I hope this will solve the problem! Kind regards to China Eletechsup : For example: Read CH2 temperature value: Send data(RS485 address is 1):01 03 00 01 00 01 D5 CA Returns data:01 03 02 FF 90 F9 D8 FF90 is the temperature value, the highest bit is 1, so the temperature is negative, it is converted to decimal = 65424, (65424-65536)/10=-11.2 is the current temperature value 65533 -65536 = -3(-0.3℃) 65530 -65536 = -6(-0.6℃) 65626 -65536 = -10(-1.0℃) 65519 -65536 = -17(-1.7℃) 65516 -65536 = -20(-2.0℃) ...
R4DCB08 FAQ
Customer : Hello Rachel, I would like to ask for your help and would be very grateful if you have a solution... I have several R4DCB08 modules from you here. They work wonderfully and are used successfully in some projects. Now there's a problem where I think you, as developers, probably have a solution or know other people who have the knowledge. Feel free to forward my email to anyone else who might be able to help me. Thanks in advance! But now to the problem! Reading positive temperatures is no problem. But reading temperatures equal to or less problematic. Do you have an example with an Arduino UNO, MEGA, how to solve the problem? I've attached the file for the Arduino UNO/MEGA with further information. I hope this will solve the problem! Kind regards to China Eletechsup : For example: Read CH2 temperature value: Send data(RS485 address is 1):01 03 00 01 00 01 D5 CA Returns data:01 03 02 FF 90 F9 D8 FF90 is the temperature value, the highest bit is 1, so the temperature is negative, it is converted to decimal = 65424, (65424-65536)/10=-11.2 is the current temperature value 65533 -65536 = -3(-0.3℃) 65530 -65536 = -6(-0.6℃) 65626 -65536 = -10(-1.0℃) 65519 -65536 = -17(-1.7℃) 65516 -65536 = -20(-2.0℃) ...
wg18a02 FAQ
Customer : Hi. I connected 4 x 20kg scales to one wg18a02 and even i calbrate it i cant achieve zero. Look.. this values jumping. I connected cables just...
wg18a02 FAQ
Customer : Hi. I connected 4 x 20kg scales to one wg18a02 and even i calbrate it i cant achieve zero. Look.. this values jumping. I connected cables just...
N4DIG08 FAQ
Customer : N4DIG08 I tried it with "Modbus Poll". The communication works - see screenshot below. But I cannot change the output. It always stays at 5V (high) no...
N4DIG08 FAQ
Customer : N4DIG08 I tried it with "Modbus Poll". The communication works - see screenshot below. But I cannot change the output. It always stays at 5V (high) no...