IMFECI2 modular

Description

Product Description

The newer ABB Symphony Plus versions part number is SPFEC12.

Catalog Description: IMFEC12, Analog Input

Alternate Part Numbers: SPFEC12, YIMFEC12, RIMFEC12, PIMFEC12, IMFEC12R

Common Typographical Errors: IMFECI2, IMFEC1Z, IMFECIZ, 1MFECIZ, 1MFEC12, 1MFECI2, 1MFEC1Z

In order to meet the requirements of industrial logic control, and in combination with the characteristics of computer control, the working mode of PLC adopts continuous cycle sequential scanning. The time taken for each scan is called the scan cycle or work cycle. The CPU starts from the execution of the first instruction, executes the user program one by one in sequence until the end of the user program, and then returns to the first instruction to start a new round of scanning. This is how the PLC repeats the above cycle scanning. The whole process of PLC operation can be represented by the operation block diagram shown in Figure 1. The whole process can be divided into the following parts:

The first part is power-on processing. After the PLC is powered on, the system will be initialized once, including hardware initialization and software initialization, power failure holding range setting and other initialization processing.

The second part is self-diagnosis processing. Each time the PLC scans, it performs a self-diagnosis check to determine whether the PLC’s own action is normal. For example, whether the CPU, battery voltage, program memory, I/O and communication are abnormal or wrong. If an abnormality is detected, the LED and abnormal relay on the CPU panel will be turned on, and the error code will be stored in the special register. When a fatal error occurs, the CPU is forced to STOP mode, and all scanning stops.

IMFECI2