AO815 ABB Industrial control automation system of analog input module card

Description

All 90-30 CPUs of AO815 can perform integer operations. (Integer operations include all positive and negative numbers, including 0). float
The point operation function enables the CPU to operate on decimals added on the basis of integers. It also has trigonometric functions and logarithmic functions
Number, exponential function and radian conversion calculation function. Floating point operation also has the function of “real number” operation. Types 352 and 374
CPU realizes floating point operation by adding a mathematical operation chip to the hardware. In the 350-364 CPU from 9.0 and later
The CPU firmware version has the firmware basis of floating point computing capability. Although AO815 CPU models 352 and 374 are based on floating point
Different hardware operation speeds and different types of firmware foundations, but in most applications this does not have any impact,
For applications where speediness is important, the 352 and 374 CPUs are the best choices. For instructions on floating point operations, please
Refer to the instruction manual of Series 90-30 PLC CPU of GFK-0467 or later
Flash Memory

All 350-374 CPUs are equipped with flash memory for two main purposes:
■ Provides memory for CPU firmware without loss
■ The memory program, AO815 hardware configuration and register data options are provided in the non lost flash memory
There are two methods for storage: (1) Store a board based backup in the user’s storage (although we still recommend that you
Keep separate backups after the program is completed). (2) Running without battery. See Chapter 6 for details
Key switch
All 350-374 CPU have key switches, but some versions of CPU firmware do not support all key switches
Function (see “Description of CPU Version” earlier in this chapter). These differences are explained in this section. Note:
The key switches in some CPUs are marked with ON/OFF and OFF/STOP, while those in other CPUs are marked with ON and OFF.
No matter how marked, the functions of all key switches are as follows:
■ Flash memory protection: AO815 is a standard hardware function, which can be used to protect flash memory from unauthorized people (these people have no keys
Key) change. When the key switch is set to the ON position, the flash memory cannot be changed (written), and the key switch function is always
Effective, no matter how the following two configuration functions are set
■ Run/Stop (configurable): This function is proposed in CPU firmware version 7.0, and it is disabled by default
Effective. This function can only be set to ENABLE by setting the R/S switch function in the CPU configuration menu
It works. If this function is set to ENABLE, the PLC can be stopped by turning the switch to the OFF position
Operation, or start PLC operation by turning this switch to ON (if there is no fault)
If the PLC has a non fatal fault, turning the switch from OFF to ON will cause the running light of the power supply to flash for 5 seconds
If the switch is turned to OFF again and then to ON again within 5 seconds, the fault will be cleared and
PLC will enter the operation mode (and the operation light will be on all the time)

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