Series Name: A985GOT.
Size: 12 inches.
Resolution: 800 * 600.
Display equipment: high brightness TFT color display.
Display color: 256 color.
Power supply: AC100-240V.
Authentication: UL/cUL/CE.
Man machine interface (Machine Interaction Human, referred to as HMI), also known as the user interface or user interface,
Is a communication interface between human and computer,
Is an important part of the computer system A68RD4N PDF A68RD4N
Is a medium for interaction and information exchange between the system and the user,
It realizes the transformation between the internal form of information and the acceptable form of human being.
Where there is a man-machine interface in the field of human computer information exchange A68RD4N PDF. Type of input: DC leakage.
Input points: 32 points.
Input voltage: 12/24.
Input current: 3/7mA.
Connection mode: terminal row.
Common common point: 32.
Functional block diagram language is a kind of PLC programming language, which is similar to digital logic circuit.
The function module is used to represent the function of the module,
Different function modules have different functions A68RD4N PDF.
Functional module figure programming language features: functional block diagram programming language is characterized by a functional module for the unit,
Analysis and understanding of the control scheme is simple and easy: function module is to use graphical form of expression,
Intuitive, for a digital logic circuit based on the design of the staff is very easy to master the programming;
Control system with complex scale and complex control logic,
Because the function module diagram can clearly express the function relation, the programming debugging time is greatly reduced. Input voltage range: AC100 ~ 120V/AC200 ~ 240V.
Output voltage: DC5/12V.
Output current: 2.3A/1.5A.
I/O points is an important indicator of PLC.
Reasonable selection of I/O points can not only satisfy the control requirements of the system,
And the total investment of the system is the lowest.
The input and output points and types of PLC should be determined according to the analog quantity and switch quantity of the controlled object,
Generally an input / output element to take up an input / output point.
Taking into account the future adjustment and expansion,
In general should be estimated on the total number of points plus the amount of spare 20%~30%.
The following describes the centralized control system I/O points of the estimate.
Relay output interface circuit of PLC
Working process: when the internal circuit output digital signal 1,
There is a current flowing through, the relay coil has a current, and then the normally open contact is closed,
Provide load currrent and voltage A68RD4N datasheet.
When the internal circuit outputs a digital signal 0, there is no current flowing through it,
The relay coil does not have a current, and the normally open contact is broken off,
A current or voltage that is discoonnected from the load A68RD4N datasheet.
It is through the output interface circuit to the internal digital circuit into a signal to make the load action or not action.