【 Weak current college 】 computer lamp used in problem

1. address to write:
Are usually more computers lamp consists of a computer console control, this control console and PC lamp will have a public between signal. Intelligent lights and control console in the past between the commonly used signal 0-10V signals (analog signal), it is the direct use of low-voltage signal to control lighting or Silicon case, its advantages are signal generation, accept and process is relatively simple, intuitive use, maintenance is easier. The disadvantage is that the signals and more trouble, signal-jamming capability also poor. Then gradually using digital signal, its advantages are shipping distances are long, immunity is higher, the same type of digital signal and you can easily do mutual combination. The disadvantage is that encoding, accept equipment complex and in existing digital technology, it can hold a limited optical path information. There are two commonly used digital signal: RS232 signal and DMX512 signal. DMX512 signal is a half line digital coded signal, using a range of increasingly widespread, is gradually becoming light control of standard signal to existing transmission bit rate and signal processing capabilities, it can set the light path output signal is transmitted to 512 optical path. When using the DMX512 transmission accurate to ensure signal, signal Terminal use Terminal load. "Terminal load" of specific add-in method: in a five-card you "plug in 2 ~ 3 feet between welding a 90 ~ 120 Ω 1/4 W small metal film resistors, the size of its impedance should reference the dimming desk manual. DMX protocol request using the link five core plug-ins. In construction, that is, only three cores: 1, 2, 3, 4 and 5 core core blank.
Computer lamp coding also known as address coding, more than one computer simultaneously using light to every computer lamp set different address coded so that the computer control console to identify each computer lamp location. When you set the address encoding, you must understand computer lamp channel, every computer lamp has its fixed channel, generally speaking each channel corresponds to a function, or that corresponds to a separate stepping motor.
In light of the tail or head has a DIP switch (high-end PC lamp with led display), a total of nine dial codes. Each dial a number that corresponds to the first few 2N-1N dial number to dial the number of the corresponding value is 512.
Case 1: (simple introduction to the code set) suppose there are three computer lamp, the first of 14 channels, 2-8-channel, 3 10 channel, then the number of the first table lamp code is 1, DIP switch dial dial 1 (some computer lamp dip switches do not dial the number 0, the code is 1), second code is the number 15, DIP the dial dialing 1.2.3.4, a third address code number 23, DIP the dial dialing 1.2.3.5, can be seen when the first computer lamp code to 1, then the second PC lamp code is the first computer lamp channel number plus the first computer lamp code number, same third computer lamp code equal to the second computer lamp channels plus a second PC lamp code number, and finally convert the number to dial codes of DIP switch position completes the PC light address coding settings.
Dial number 12345678910
Corresponding address 1248163264128256512 [fenye]
Example 2: (how to ensure that use the same console, convenient control channels to different computer lights) our original 4 GSM scanning computer lamp, later acquired 8 homemade head light. The cause of the funds, it is not possible to purchase a new general-purpose computer light console, to solve this problem, we have adopted the following approach: we start from the original computer lamp 4 lights (both last scan lights) leads to a signal cable to the new lighting of the lamp, 1, place all 12 PC lamp series, consists of a signal line control, solving the problem of DMX512 signal output; and then we take two lamps in the channel number of the access code for standards setting, the original GSM signal is 16-channel, new lamps is 8-channel, we will address code between the interval is set to 16. This ensures each lamp is good control, but does not produce channel coverage of issues; and, finally, we follow the new lamp of each channel features programming new light Gallery, allows the console to recognize the new lamp. So we can properly use lamps, for a variety of programming. Of course, this is only in limited circumstances, expedient, after all, in comparison with cumbersome on, conditional or select a general-purpose computer light console is beneficial.
Case 3: (the computer light signal cable problems) computer lamp is a digital device, they are threaded through the signal lines, performing light from computer console provides instructions to complete various actions (light movement, color changes, patterns, transformation, etc.). Therefore, the importance of the signal cable is well imagine, if a signal cable troubles, it will cause the entire system of control disorder, unable to function properly. Also note that the signal cable length of control, DMX allows effective transmission distance is 250m, typically, the length of signal line control will not exceed 150m, otherwise, the control signal attenuation is serious, not very good control intelligent lights. If the signal cable is too long, you should consider increasing the signal amplifier. In retrospect, we encountered in the practical work of many failures that are caused by the signal line. Therefore, before you connect the signal cable to each signal line carefully measure and control circuit of the appropriate increased signal amplifier, the author has long work experience that are often able to achieve a multiplier effect. Usually a DMX512 interface can drive up to 32 digital equipment; if the receiving end all adopt DMX487 manifold block to receive a signal, then a DMX output interface is capable of driving 128 digital equipment.
Case 4: (computer lamp power supply problem) in theentire television production system, light system power consumption Max. Electricity sector generally provide specialized power transformer for the power supply, lighting system-phase electrical power output, voltage 380V, while the computer is the lamp is fed into the power supply 220V, 50Hz。 Give computer lamp power supply with extreme caution, do not access the phase voltage 380V, otherwise, the burning of the circuit board inside the PC light, or even cause the entire lamp scrap. Every computer problems with power light should also note that due to the intelligent lights in electrical devices, there are a variety of motor, circuit board, bulb boot device, etc. If one calibration-1200W computer lamp, its consumption is 2000W. In addition, we must pay attention to the power supply and ground zero line, if computer lamp-infeed power protection Earth wire is not connected properly, it may cause damage to the luminaire.