MOOG D136-001-007，MOOG D136-001-008 Both contain controller code dog drivers，D136-002-002，D136-002-003，D136-002-004，D136-002-005，D137-001-010。Programmable controller (PLC) is to take sequential scanning, continuous cycle of the way to work, that is, in PLC operation, PLC according to the user according to the control requirements and stored in the user program memory program, according to the instruction step number or address number for periodic cycle scan.
After the controller is put into operation, its working process is generally divided into three stages, namely input sampling, user program execution and output refresh. The completion of the three phases is called a scan cycle, during which the CPU of the programmable logic controller repeats the three phases at a certain scanning speed.
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In the programmable controller input sampling phase, the programmable logic controller reads all the input status and data successively in the scanning way, and stores them in the corresponding cell in the I/O map area. After the end of the input sampling, the user program execution and output refresh phase. In both phases, even if the input state and data change.
The state and data of the corresponding cell in the I/O map area do not change. Therefore, if the input is a pulse signal, the width of the pulse signal must be greater than one scan cycle in order to ensure that the input can be read in any case. When the scan user program is finished, the programmable logic controller enters the output refresh phase.
During this period, the CPU refreshes all output latch circuits according to the corresponding state and data in the I/O map area, and then drives the corresponding peripheral through the output circuit, which is the real output of the programmable logic controller.
| CPU模块 |
| D136-001-007 |
| D136-001-008 |
| 以太网 |
| D136-002-002 |
| D136-002-003 |
| D136-002-004 |
| D136-002-005 |
| D137-001-010 |
| 数字量远程链接模块 |
| D137-002-001 |
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