JPH0247800B2 - NIJUKASETSUTENSHUTSURYOKUHOSHIKI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a duplex contact output system, and more particularly to a duplex contact output system when controlling a data telemeter system using a relay.

When controlling a telemeter system using relays, a method is adopted in which two relays are used to increase reliability in order to reduce malfunctions. An example is shown in FIG. FIG. 1 is an example of duplication of relay contacts, which is generally considered, and in order to output contacts in units of 1 word (16 bits), each relay is driven by an independent driver for each word. In other words, 16-bit input information from a control section such as a processor is inputted through a gate section 1 and is input into a first word formed by a register 2a and a driver 3a, and a register 2b and a driver 3.
The driver based on the second word formed by b drives the relays A ₁ to A ₁₆ and B ₁ to B ₁₆ , and outputs the contacts a ₁ , b ₁ to _{a 16} , and b ₁₆ . Note that the same information is written into the registers 2a and 2b by a control section such as a processor.

In the conventional example shown in FIG. 1, the relays and drivers are duplicated, but the original control section that supplies data to the drive section is common. In the example shown in Figure 1, the parts from the control part to the gate part 1 are common, so the reliability of the contact output of the output part depends on the reliability of the parts in the gate part 1 and the common parts before it. I will do it. Therefore, even if relays and drivers are duplicated, no significant improvement in reliability can be expected.

An object of the present invention is to provide a duplex contact system with even higher reliability by duplicating the signal path from the control section, thereby duplicating drivers and relays.

According to the present invention, an input section has a common input section and a plurality of output sections each having two or more words, and a relay contact duplication method is provided in which the relay contact is opened and closed in units of one word (n bits) to output information from the input section. , writes the n-bit information as a first word to the input line, operates one relay group of the duplicated relay group via a relay driver, and after some time passes the n-bit information to the input section as a second word. The upper and lower bytes of the bit information are exchanged and written, and the written second word information is taken out to the second relay driver, and then the connection between the second relay driver and the second relay group is established. A configuration in which the upper and lower bytes are exchanged and connected, and the second word is used as information corresponding to the first word, and the contacts of two relays corresponding to the first and second words are combined and output. A redundant contact output method is proposed.

Embodiments of the duplex contact system according to the present invention will be described in detail below.

FIG. 2 is a block diagram of one embodiment of the duplex contact system according to the present invention, and FIG. 3 shows the processing within the control section necessary for carrying out the present invention.

In Figure 2, 16
The bit input information is input through the gate section 11, and the first word is formed by the register 12a and the driver 13a, and the second word is formed by the register _12b and the driver _13b . B ₁ to _{B 16} are driven and output is obtained to the contacts a ₁ , b ₁ to a ₁₆ to _{b 16} , but the difference between FIG. 2 and FIG. 1 is that in the present invention shown in FIG. The connection between the output of the driver 13b and the relay is changed by switching the upper and lower 8 bits. Therefore, in order to obtain the desired contact output, the upper and lower bytes of the 16-bit data written to registers 12a and 12b are exchanged. This state is shown in FIG. In FIG. 3, a indicates data written from the control section to the register 12a, and b indicates data written from the control section to the register 12b.
For example, in FIG. 2, if a contact output of "OUT ₁ " is required, the operation will be as shown below.

(b) In order to operate the "A ₁ " relay, the control section turns on the data D ₁ in Figure 3 a and sets the register 12.
Write in a. This data D ₁ passes through gate G ₁ of gate 11 in FIG.

(b) Next, in order to operate the "B ₁ " relay, the control section replaces the upper byte of the data used in the above (a) as shown in FIG. 3b and writes it to the register 12b. The signal corresponding to the original "D ₁ " passes through gate G ₉ of gate 11 in FIG. In FIG. 3b, the process of exchanging the upper and lower bytes is performed within the control section.

The operations in items (a) and (b) above will be collectively explained with reference to FIG. First, in block 21 of FIG. 4a, the control section reads data A from the memory, and in block 22, writes the read data into the register 12a using the control signal CONT1. Next, in block 23, the control section reads data "A" from the memory again, and in block 24, data "A" is read out again from the memory.
The upper and lower bytes of the data are inverted, and in block 25, the inverted data "A" is sent to the register 12b as a control signal.
Write using CONT2. FIG. 4b shows the temporal relationship between data "A" on the data bus, its inverted data, and control signals CONT1 and CONT2 for registers 12a and 12b.

As explained in detail above, according to the present invention, not only the relay contacts but also the signal paths from the gate section and the control section before it are duplicated, and high reliability is achieved by duplicating the driver and relay. It will be done.

[Brief explanation of drawings]

Fig. 1 is an example of a conventionally considered duplex contact output method, Fig. 2 is a block diagram of an embodiment of the duplex contact output method according to the present invention, and Fig. 3 is a diagram for implementing the method according to the present invention. FIG. 4 is an explanatory diagram of the necessary processing within the control section, and FIG. 4 is a timing chart illustrating the processing of the control section. In the figure, 11 is a gate part, 12a, 12b
are first and second registers, and 13a and 13b are first and second drivers.

Claims (1)

[Claims] 1 In a relay contact duplication method in which the input section has a common input section and a plurality of output sections each having two or more words, and the relay contact is opened and closed in units of one word (n bits) to output information from the input section, the input section Write the n-bit information as a first word to the input section, operate one of the duplicated relay groups via a relay driver, and then write the n-bit information as a second word to the input section at the same time. The lower byte is exchanged and written, and the written second
After extracting word information to a second relay driver, connect the second relay driver and the second relay group by exchanging upper and lower bytes,
A duplex contact output method, wherein the second word is used as information corresponding to the first word, and contacts of two relays corresponding to the first and second words are combined and output.