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A1SS91 I/O bus monitoring module

MITSUBISHI A1SS91 Manual And Instructions
A1SS91 datasheetPDF datasheet
A1SS91 User's Manual
A1SS91 HardwareUser's Manual

MITSUBISHI A1SS91 Product information and technical parameters:
Brand: MITSUBISHI
Name: I/O bus monitoring module
Model: A1SS91
A1SS91 is used to insert a fixed control program in front of the user program to monitor the specific Y output.
Monitoring is carried out only when the CPU is in a state of running or stopping, and the monitoring failure is monitored in the suspended state.
When using this module, you can output from the I/O bus error contact or output from the running contact or the general contact output,
DC5V check can also be performed.
The popularization and application of PLC programming has been developed rapidly in our country,
It has been widely used in all kinds of mechanical equipment and production process of electrical control devices,
All walks of life have emerged a large number of application of PLC transformation of the results of the equipment.
Understand the working principle of PLC, have the ability to design, debug and maintain the PLC control system,
Has become the basic requirements of modern industry for electrical technicians and engineering students.
The instruction list programming language is a programming language similar to assembly language mnemonic,
As well as assembly language by the operation code and the number of operations.
In the case of the computer for the PLC handheld programmer compile user program.
At the same time, the programming language of the instruction list corresponds to the ladder diagram programming language,
In PLC programming software can be converted to each other. Figure 3 is the instruction sheet corresponding to the ladder diagram of figure 2PLC.
The characteristics of instruction table programming language is used to represent mnemonic operation function,
Easy to remember, easy to grasp;
In the handheld programmer on the keyboard using the mnemonic representation, easy to operate, can be programmed in computer;
There is a one-to-one correspondence between the ladder diagram and the ladder diagram. Its characteristics are basically consistent with the ladder diagram language.

Input type: AC/DC.
Input points: 16 points.
Input voltage: 12/DC24.
Input current: 4.2/8.6.
Connection mode: terminal row.
Common common point: 16.
The instruction list programming language is a programming language similar to assembly language mnemonic,
As well as assembly language by the operation code and the number of operations A1SS91.
In the case of the computer for the PLC handheld programmer compile user program A1SS91
At the same time, the programming language of the instruction list corresponds to the ladder diagram programming language,
In PLC programming software can be converted to each other. Figure 3 is the instruction sheet corresponding to the ladder diagram of figure 2PLC.
The characteristics of instruction table programming language is used to represent mnemonic operation function,
Easy to remember, easy to grasp;
In the handheld programmer on the keyboard using the mnemonic representation, easy to operate, can be programmed in computer;
There is a one-to-one correspondence between the ladder diagram and the ladder diagram A1SS91. Its characteristics are basically consistent with the ladder diagram language A1SS91. Program memory capacity 14K.
Input and output points to the maximum 512 points.
A scan cycle of PLC must pass through three stages: input sampling, program execution and output refresh.
PLC in the input sampling phase: first of all, in order to scan the sequence of all existing input latches in the input terminal of the state or input data read,
And write it into the corresponding input status register,
Refresh the input, then close the input port, enter the program execution stage. 32: terminal line adapter 0.3mm2 (AGW22).I/O slots: 5 slots.
Can you install the power module.
Outline dimension: 260*130.
There are two types of extended floor,
A power module can be inserted, and the other one is noot A1SS91.
The choice of any type of substrate depends on the total DC5V current consumption and the power supply on the CPU main substrate.
If the total demand is less than the power output, no additional power supply,
Then you can choose a more ecconomical expansion board A1SS91.
Both ends of the main base plate of the CPU have an expansion interface, and can be used for extending the cable connection.


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