ABB 3ASC25H209-DATX110 I/O terminal board

ABB 3ASC25H209-DATX110 I/O terminal board

Any function on the multi-function device can be connected to any INTx # line. The interrupt bow | pin register defines the INTx # line used by the function to request an interrupt. If the device implements a single INTx # line, it is called INTA #; If it implements two lines, it is called INTA # and INTB #; For multi-function devices, all functions can use the same INTx # line, or each function can have its own (* * more than four functions) or any combination of them. A single function cannot generate interrupt requests on multiple INTx # lines. Accept VME bus interrupt from PCI through the line defined by BIOS. BIOS defines the interrupt line to be used according to the system that needs to use the interrupt line.
Convenient programming: Although there are no actual relays, time relays and counters in PLC, these devices actually exist through the program (software) and system memory. The number is unimaginable for relay control system. Even for small PLCs, the number of internal relays can be counted in thousands, and the number of time relays and counts can also be counted in hundreds. Moreover, the contacts of these relays can be used * * times. There are so many internal logic devices in PLC that users can use them without any restrictions. Only the entry and exit points are considered. It doesn’t matter how much this internal access point is used. The number of control points of large PLC can reach more than 10000. How can there be such a large real system? If it is not enough, it can also be controlled online without any restrictions. The command system of PLC is also very rich, which can easily realize the control of various switching values and analog values. The PLC also has a memory area for storing data, which can store all the information to be saved in the control process In a word, because of the strong function of PLC, the restriction to play its role in the control system is not the PLC itself, but people’s imagination, or other supporting hardware facilities.

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