8 slots.
Power supply unit.
QnA series unit installation.
High speed access.
CE logo fit.
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 A73CPU Manual A73CPU
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%.
When the programmer input programinto the user program memory,
Then CPU according to the function of the system (the system program memory to explain the compiler),
Translate the user program into PLC internally recognized by the user to compile the program A73CPU Manual .
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 current and voltage A73CPU Manual .
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 disconnected from the load MITSUBISHI PLC Manual .
It is through the output interface circuit to the internal digital circuit into a signal to make the load action or not action MITSUBISHI PLC Manual . A1SG60 is an empty cover that is used to plug in the unused I/O slot on the main board or on the extended board.
A1SG60 is a reserved dummy module I/O point to PLC extended I/O system.
With the switch on the module can be set to retain the I/O point,
Can set 16 points, 32 points, 48 points and 64 points MITSUBISHI PLC Manual . Extension cable.
Length: 2000mm. Type of input: DC leakage.
Input points: 32 points.
Input voltage: DC12/24.
Input current: 3/7mA.
Output type: transistor drain type.
Output points: 32 points.
Common public end points: 32.
PLC is introduced by the relay control technology after the development of micro processing technology,
Can be easily and reliably used for switching control.
As the analog quantity can be converted into digital quantity, the number of digital quantity is just a number of switching value,
Therefore, after the conversion of analog, PLC can also be reliable for processing control.
Because the continuous production process often has the analog quantity, the analog quantity control is sometimes called process control.
Analog quantity is not electricity, and PLC can only handle digital quantity, quantity of electricity.
All to realize the conversion between them to have the sensor, the analog quantity into a number of power.
If this power is not standard, but also through the transmitter,
The non-standard power into a standard electrical signal, such as 1-5V, 4-20mA, 0-10V, etc..
At the same time, there is also an analog input unit (A/D),
Transform these standard electrrical signals into digital signals,
The analog output unit (D/A), in order to transform the digital quantity after PLC processing into analog quantity -- standard electric signal A73CPU Programming Manual.
So the standard telecommunication number, the conversiion between the number of operations to use a variety of computing A73CPU Manual .
This requires the resolution of the analog unit and the standard electrical signal.