The controller - how to debug the science of uniting the lifting the door

The thing is, I'll xianyang dynasty on a business trip, a colleague asked I elevator door for me? I said you send photos first, I look at the site. Find overhead door brand is horman and controller. Horman door controller is broken, don't want to replace horman door controller, but also with another door interlock. Ask what I need to control components. I ask the first, the original door can limit, can tell, we just change the control system. I want to tell him

the inverter 1

PLC controller 1

touch screen 1 ( Is in order to improve the class, so we can raise prices)

because colleagues sent me the photos, I can't see more information. I can only suggest that so much. But then I asked my colleague, climb to the top of the door see if motor general motors, or the motor is special. Check the limit and see if it is good. Is in addition to horman door controller need not check, other have to check it.

later, there would be no more I ask, I then xianyang bitter, don't mind so much. But then, to my surprise, let me work overtime to lift door continuously. Is doing the simple things, also not easy.

when I returned from xianyang, immediately called to the scene installation elevator door, my mission is to cooperate. I with a head of the circle to the scene, what also don't know, colleagues for how to do, how I can help.

result on the first day to the scene, 1. Door up good, down only to fall, at a certain position in other location drop speed is slow, 2. Door of the rising and falling location, it is by the encoder feedback, because the original client is rotary encoder, but we also use the encoder, the door up and down is not accurate.

preliminary analysis is encoder failure or program failure, with questions, we begin to search, because the encoder position on the top of the gate location, so we took a new encoder, the first in the experiment, I took a look, is incremental encoder. The numerical and experimental results I found wrong, Increase in place and decrease in place of the door, that we use to had been compared, instruction is encoding the location of the position feedback contrast our setup) 。 Read out the value of the encoder after conversion, the result is not a multiple growth, growth is multiple. Encoder read values cannot be directly used for numerical comparison need to transform. Prove that programming has a problem, to rewrite the program, problem out. But it also has ended.

this is my summary of the encoder, welcome to add

encoder based on the principle of the detection, can be divided into optical type, magnetoelectric, inductive and capacitive.

according to the output signal form, can be divided into analog encoder, digital quantity encoder. Encoding output: SSI, 4 - 20MA、0- 10V，RS485，profibus- Dp, DEVicenet, parallel, binary code, BiSS, CANopen, Endat and Hiperface, etc. The encoder output format: signal output sine wave ( Current or voltage) , square wave, TTL HTL) , open collector ( PNP型、NPN型)

according to the way of encoder, divided into incremental encoder, absolute encoder and hybrid encoder.

hotel finally call, had the network, I finally can continue to write the

we modify the program is good, but the encoder high-speed counter in the PLC controller program, or counting inaccurate, door after lifting, different every time. Fault, still suspected interference, re-examine the encoder connection, check grounding, shielding line no problem. Continue to test, found that the elevator door, vibration is larger in the process of lifting, doubt is counting encoder feedback vibration interference, elevator door static state, the vibration test, I found I just shake the lift door, the encoder was himself in the count. To find the reason, I can't help asking, why not have a problem, because the original is counting encoder feedback signal, how to have a problem now.

colleagues told me that the absolute value of the original resistance encoder, namely analog output signal. For our overhead door:

generally poor anti-seismic effect incremental encoder, absolute value encoder seismic effect is good, but not all absolute value encoder seismic effect is good, this time, the absolute value encoder to choose carefully. Single ring absolute encoder and absolute value encoder. In this environment, I'd choose single ring absolute mechanical encoder, the seismic effect is good, price good, because the elevator door accuracy is not high.

ah! Me to xianyang, repeatedly stressed, look at the old door with what, we also use what as far as possible. There problems, let me more don't understand why the door up good, falling can only be in a position to drop, less other location is slow? Next time you update this problem, we are how to solve.

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have three basic components.