MITSUBISHI AJ71C21-S1 Manual AJ71C21-S1 User's Manual

I/O control method: refresh mode or direct mode.
User program storage capacity: 8K step.
I/O points: 256 points.
Memory capacity: bytes 64K.
ANSCPU has been updated to ANSHCPU, and it has the following advantages.
16 bit dedicated microprocessor.
Large capacity battery backup memory RAM.
Extended I/O control capability AJ71C21-S1 Manual AJ71C21-S1 User's Manual.
Dedicated CC-Link instruction.
Capacity for extended comment storage AJ71C21-S1
Write speed processing. Input points: 32 points.
Input voltage: AC200 ~ 240V.
Current: 5mA.
Response time: 55ms.
16 points / a common end.
50 point terminal station.
System program memory for storing system program,
Including management procedures, monitoring procedures, as well as the user program to do the compiler to compile the process of interpretation AJ71C21-S1 Manual AJ71C21-S1 User's Manual.
Read only memory. Manufacturers use, content can not be changed, power does not disappear.
PLC selection with the development of PLC technology, more and more types of PLC products,
Function is becoming more and more perfect, and its application is more and more extensive.
Different series of different models of PLC has different performance, applicable occasions also have different emphasis,
Price also has a greater difference AJ71C21-S1 Manual AJ71C21-S1 User's Manual. Therefore PLC selection,
Under the premise of meeting the control requirements,
Should consider the best performance to price ratio, a reasonable choice of PLC.
Each scanning process. Focus on the input signal sampling. Focus on the output signal to refresh.
Input refresh process. When the input port is closed,
Program in the implementation phase, the input end of a new state, the new state can not be read.
Only when the program is scanned, the new state is read.
A scan cycle is divided into the input sample, the program execution, the output refresh.
The contents of the component image register are changed with the change of the execution of the program AJ71C21-S1 Manual AJ71C21-S1 User's Manual.
The length of the scan cycle is determined by the three.
CPU the speed of executing instructions.
Time of instruction.
Instruction count.
Due to thhe adoption of centralized sampling AJ71C21-S1 Manual AJ71C21-S1 User's Manual.
Centralized output mode.
There exist input / output hysteresis phenomena, i.e., the input / output response delay.