摘要:
The invention relates to an arrangement with a plurality of plug points (SP1, ..., SP4) which are interconnected via a system bus (SYB) with data and control lines and into which at least one CPU (CP) is plugged and a plurality of functional peripheral devices (PE1, PE2, PE4) can be plugged. The arrangement is constructed in such a way that the CPU (CP) rapidly recognises a plugged-in in unit triggering an alarm. The invention is applicable to store programmable controls.
摘要:
The invention pertains to a configuration for data transfer with a parallel bus system, consisting of address, data and control buses, and with several units (3, 4, 5, 6) interfacing with them. A first control line (1) is used to send an acknowledge signal (Ready), with which one or more units addressed by a first unit acknowledge accesses in access cycles. A second control line (2) is used to detect addressing errors and accesses to non-existant units and to carry to the first unit an answering signal (SR) from the others indicating whether one of the interfaced units was addressed. To do so the answering signal (SR) has dominant and recessive statuses. During an access cycle only addressed units generate a dominant status. The answering signal (SR) is also used for synchronous multipoint access. The invention is used in bus systems.
摘要:
The invention relates to an arrangement with at least one master unit connected via a bus to slave units, each having a store in which the master unit performs read and/or write operations. Suitable means make it possible for the master unit to initialise data access uniformly on each of the slave units according to a predetermined communication protocol. The proposal is also for a slave unit which is suitable for communication with a master unit according to said protocol. The invention is used in automation devices.
摘要:
An arrangement for transmitting data over a bus (2, 6, 7) has a central unit (1, 4, 5) which initiates data transmission and one or several peripheral units (3, 8, 9) linked to each other by the bus. In at least one of the components, besides first control lines and data lines for transmitting a data word having a first data width, further control lines and further data lines for transmitting a data word having a second data width are also provided. These are designed in such a way that components with different data bus widths can communicate with each other by transmission of data words having the smallest existent data width. In automation equipment, the invention allows any combination of components of different classes of capacity. The invention is used in bus systems.
摘要:
The invention pertains to a configuration for data transfer with a parallel bus system, consisting of address, data and control buses, and with several units (3, 4, 5, 6) interfacing with them. A first control line (1) is used to send an acknowledge signal (Ready), with which one or more units addressed by a first unit acknowledge accesses in access cycles. A second control line (2) is used to detect addressing errors and accesses to non-existant units and to carry to the first unit an answering signal (SR) from the others indicating whether one of the interfaced units was addressed. To do so the answering signal (SR) has dominant and recessive statuses. During an access cycle only addressed units generate a dominant status. The answering signal (SR) is also used for synchronous multipoint access. The invention is used in bus systems.
摘要:
The proposal is for an arrangement with a plurality of plug points (SP1, ...) which are interconnected via a system bus (SYB) having data and control lines, address lines (AL1, ...) taken to connections of the plug points (SP1, ...), one of which is connected to a selector terminal (AN1, ...), and plug-in functional units (FE1, ...), at least one (FE1; FE3) of which has means for connecting the address lines (AL1, ...) to this unit and each of the remaining functional units (FE2; FE4) has means for connecting the unit to the selector terminal (AN1, ...) of the plug point. Units performing read and write functions can be fitted at any plug point in such an arrangement. The invention is applicable in store-programmable controls.
摘要:
The proposal is for an arrangement with a plurality of plug points (SP1, ...) which are interconnected via a system bus (SYB) having data and control lines, address lines (AL1, ...) taken to connections of the plug points (SP1, ...), one of which is connected to a selector terminal (AN1, ...), and plug-in functional units (FE1, ...), at least one (FE1; FE3) of which has means for connecting the address lines (AL1, ...) to this unit and each of the remaining functional units (FE2; FE4) has means for connecting the unit to the selector terminal (AN1, ...) of the plug point. Units performing read and write functions can be fitted at any plug point in such an arrangement. The invention is applicable in store-programmable controls.
摘要:
The invention relates to an arrangement for transmitting data via a bus with a central unit and a plurality of peripheral units connected to the bus, to each of which a physical address field of predetermined size is allocated via plug point addressing. A programmable conversion unit (1) allocates to logic addresses used in the central unit the corresponding physical addresses. Thus gaps in the physical address field caused by the geographical addressing process has no effect on the addresses of the user program and the process data can be given sequential logic addresses. The invention is applicable in bus systems.
摘要:
The invention pertains to a configuration with several active and passive bus users (MP1, MP2, SP1, SP2), each of which is allocated a memory (S1, S2, SS1, SS2), with its own memory area (SB1, SB2, SB3, SB4), where each bus user (MP1, MP2, SP1, SP2) has read access to its own memory area (SB1, SB2, SB3, SB4) and each active bus user (MP1, MP2) has write access to every memory area (SB1, SB2, SB3, SB4). A control line (ML) is provided for sending an indicative signal (SR) which indicates to the active bus users (MP1, MP2) accessing the memory areas (SB1, SB2, SB3, SB4) whether data in the memory areas (SB1, SB2, SB3, SB4) have already been written in, as the answering signal (SR) has dominant and recessive statuses and outside of access cycles all bus users produce a dominant status, during a cycle of access to the memory areas (SB1, SB2, SB3, SB4) only the bus users (MP1, MP2, SP1, SP2) in whose memory areas (SB1, SB2, SB3, SB4) the data have not yet been written in produce such a signal. The invention is used in automation systems.
摘要:
The invention relates to a method for transmitting data (D) in a particularly simple, secure and rapid manner, in accordance with various requirements, on a single data transmission unit. According to the inventive method for transmitting data (D) between data processing units (2,4) of a data processing system (1) via a data transmission unit, data (D) is transmitted in a parallel manner in at least two protocols. The first protocol enables data (D) to be transmitted within a first frequency range with a first signal sequence and a first signal level. The second protocol enables other data (D) to be transmitted within a second frequency range with a second signal sequence and a second signal level.