JPH03213460A - Control device for electric point - Google Patents

Abstract

PURPOSE:To prevent the energizing circuit of a point from being brought into an opening state during switch of a control system by combining together specified switch means, in a control device for an electric point to ensure reliability of control by switching the one control system to the other control system having the same constitution as that of the one control system during failure in operation of the one control system. CONSTITUTION:In a point control device comprising first and second control systems having point control circuits 12 and 22 to input output signals from CPU 11 and 21, source circuits 13 and 23 formed with a solid state relay are arranged in the point control circuits 12 and 22, respectively. Throw-short-circuit circuits 14 and 24, forming the energizing circuit of a magnetic hold relay WR of a point 1 based on a throw command signal to control a throw direction and short-circuited by an energizing circuit forming a closed loop by means of a throw completion detecting signal. Contacts TCHR2 and TCHR1 of check relays TCHR2 and TCHR1 to be excited when relay contacts NWLR3 and RMLR3 are actuated upward are provided to energizing circuits A and B of each control system.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a control device for an electric point machine, and in particular, it has two control systems, and when one control system fails, the other control system The present invention relates to a control device for an electric point machine with a dual system configuration, which improves reliability of control by switching to.

<Prior Art> In railway transportation, there is an interlocking device as a device for smooth train operation in, for example, a station premises. this is,
A certain order of handling should be established between the signals within the station premises, or between the signals and the switch, and if necessary, the switch or signal may be locked to create a chain relationship to prevent incorrect handling. This is what makes each of them work.

In such interlocking devices, electronic interlocking devices that perform interlocking control using microcomputers are being put into practical use due to advances in electronics technology in recent years. There are relay-less interfaces in which the interface section that interfaces with the terminal is an electronic terminal section composed of a microcomputer or the like without using a relay.

To explain the control method for electric point machines in such a relay-less electronic interlocking device, first, control information for each point machine is installed corresponding to each point machine from the interlocking processing section of the electronic interlocking device. Input into the electronic terminal section. Then, in the switch machine control circuit in the electronic terminal section, a switching command signal based on the control information configures an energizing circuit to the magnetic holding relay, controls the polarity reversal of the magnetic holding relay, and controls the rotation direction of the morph. The point machine is turned in the commanded turning direction (orientation or reverse direction). Contact information of the circuit controller based on this switching operation is inputted to the electric switch control circuit in the electronic terminal section as switching operation information of the switch. When a conversion completion detection signal based on the contact information of the circuit controller is input, the energizing circuit to the magnetic holding relay is short-circuited as a closed loop, locking the operation of the electric switch machine, and the switch machine is activated due to external noise etc. Avoid converting to

In order to improve the reliability of control of such a point machine, two control systems with the same configuration are provided, and normally one control system (main system) drives and controls the point machine, and the main system Some control systems have a dual system configuration in which when a failure occurs in one system, the control system switches to the other control system (slave system) to drive and control the switch.

<Problem to be solved by the invention> However, when configuring the control device of an electric point machine into a dual system, the conventional switching method from the main system to the slave system is as follows.
The main system that controls the switch machine is always electrically connected to the energized circuit of the switch machine, while the slave system that is not controlling the switch machine is electrically connected to the energized circuit of the switch machine. Keep it separate.

When a failure occurs in the main system and you switch to the slave system,
To electrically connect a slave system to a current-carrying circuit of an electric switch machine on the condition that the operation of the main system is stopped and the main system is disconnected from the current-carrying circuit of the switch machine.

Therefore, in the conventional dual-system control device for an electric point machine, when switching from the main system to the slave system, the current-carrying circuit of the switch momentarily becomes open. If the current-carrying circuit becomes open in this manner, there is a risk that the switch machine may operate incorrectly due to external noise or the like.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a control device for an electric switch machine that does not cause the energization circuit of the switch machine to become open even when switching from the main system to the slave system. With the goal.

<Means for Solving the Problems> For this reason, the present invention has two control systems having the same configuration, and when one control system fails, switches to the other control system to drive and control the electric point machine. In a control device for an electric point machine configured as a dual system, a switching circuit is provided in each of both control systems and constitutes an energization circuit of the point machine based on a switching command signal, and A short-circuit circuit is provided, which closes the energizing circuit and short-circuits it based on the switching operation completion detection signal, and the switching command signal inputs the energizing circuit between the other control system and the switch machine into one control system. A first switch means which is turned on when the switching operation completion detection signal is inputted, and a energizing circuit between one control system and the switch machine is cut off when the switching command signal is inputted to the other control system. and second switch means that is turned on when the switching operation completion detection signal is input.

<Operation> In the above configuration, during non-control from the end of conversion to the next conversion operation, the energizing circuit of the switch is electrically connected to both control systems by the first switch means and the second switch means, respectively. At the same time, the short circuit forms a closed loop and is in a short circuit state. During control from the start of the conversion operation to the end of the conversion operation, when one control system (main system) starts the control operation by inputting a conversion command signal, the other control system (slave system) is switched by the first switch means. The switch machine performs a switching operation by the switching circuit of one control system (main system), and upon input of the switching completion detection signal, the first switch means reactivates the switching circuit of the other control system (main system). system) is connected to the energized circuit.

When a failure occurs in one control system (main system) and switching to the other control system (slave system), since current-carrying circuits are connected to both control systems during non-control, only one control system ( Even if the main system (main system) is disconnected by the second switch means, the energizing circuit of the switch machine will not become open.

<Example> Embodiments of the present invention will be described below based on the drawings.

In the diagram showing this embodiment, the switch control unit of the electronic terminal of the electronic interlocking device is configured as a dual system having two control systems, a first control system and a second control system, which have the same configuration. . Both control systems include a CPU Ull, 21 and a CPU II, 2.
Switch machine 1, which is a field device, based on the control information from 1
It is equipped with a switch control circuit 12.22 for driving and controlling the switch.

The switch control circuit 12.22 of each control system includes a power supply circuit 13.22 composed of a solid state relay (SSR).
23, configures the energizing circuit of the magnetic retention relay WR of the point machine 1 based on the conversion command signal to control the switching direction, and also configures the energization circuit of the magnetic retention relay WR in the point machine 1 based on the conversion completion detection signal. A switching short-circuit circuit 1424 is provided to short-circuit the current-carrying circuit as a closed loop. The conversion-short circuit 14゜24 is lifted up and connected to the a side in response to a conversion command signal to the stereotaxic side, and dropped and connected to the b side in response to a conversion command signal to the opposite orientation side and a conversion completion detection signal. Relay contacts NWLRI and NWLR2, and relay contact RWLRI which is lifted up and connected to the a side in response to a conversion command signal to the opposite position side, and dropped and connected to the d side in response to a conversion command signal to the normal position side and a conversion completion detection signal. , RWLR2.

The energizing circuit A of the first control system connected to the magnetic holding relay WR in the switch machine 1 is provided with an energizing circuit A in the switch machine control circuit 22 on the second control system side and connected in parallel with each other. A contact TCHR2 of a second check relay TCHR2 is interposed, which is energized when either relay contact NWLR3 or relay contact RWLR3 is lifted. In addition, the energizing circuit B of the second control system connected to the magnetic holding relay WR in the switch machine 1 includes a power supply circuit B provided in the switch machine control circuit 12 on the first control system side and connected in parallel with each other. A contact TCHR of a first check relay TCHRI is interposed, which is energized when either relay contact NWLR3 or relay contact RWLR3 is struck. Here, the first check relay T C
HR1 and its contact T CHR, and relay contact NWLR
3 and RWLR3 constitute a first switch means, and a second check relay TCHR2, its contact TCHR2, and relay contacts NWLR3 and RWLR3 constitute a second switch means.

Next, the operation will be described in the case where the first control system side is the main system and the second control system side is the slave system.

When converting the switch 1, a conversion command signal is input from the CPU II to the switch control circuit 12.

For example, when the conversion command is for the localization side, relay contact NWL
When R3 is lifted up, the first check relay T CHR1 is energized and its contact TCHR is lifted up, so the energizing circuit B connected to the second control system (slave system) is connected to the magnetic holding relay WR of the point machine. be separated.

Also, the power supply circuit 13 operates, the power supply is connected, and the conversion
Relay contacts NWLRI and NWLR2 of short circuit 14 are a
Relay contact RWLRI with connection to each side
RWLR2 is connected to the d side. This causes the direct current to flow from the power supply circuit 13 to the relay contact NWLRI to the relay contact RWLRI to the contact TCHR, to the magnetic holding relay WR.
-+7 concubine points TCHR.

→ Relay contact RWLR2 → Relay contact NWLR2 → Power supply circuit 13, and the current flows in the right direction in the figure through the magnetic holding relay WR, and the point machine 1 is switched to the normal position side.

During the control of the first control system (main system), the second control system (
The energizing circuit B of the slave system is separated from the magnetic holding relay WR, so there is no concern that it will be influenced by the second control system, which is the slave system.

Then, when conversion completion information is generated from a circuit controller (not shown) provided in the switch machine 1 and inputted to the CPU II, the
PUII outputs a conversion completion detection signal to the switch machine control circuit 12, and all relay contacts NWL of the switch short circuit 14
RI, NWLR2, and RWLRI RWLR2 falls and connects to the b side and a side, respectively, and short-circuits the current-carrying circuit A as a closed loop to form a circuit. Also, relay contact NW
LR3 and RWLR3 fell and the first check relay TC
HR1 is demagnetized, its contact T CHR falls, and the energizing circuit B of the second control system is connected to the magnetic holding relay WR. Therefore, after the non-controlled conversion operation of the first control system is completed, both the first and second control systems (main system and slave system) are connected to the magnetic holding relay WR.

Regarding the switching operation to the opposite side, relay contact RWL
When R3 lifts up, the first check relay TCHR
1 is excited. Further, the connections of the relay contacts NWLRI, 2 and RWLRl, 2 of the conversion-short circuit 14 are on the b side and the d side, respectively, and the direction of the current flowing through the magnetic holding relay WR is reversed.

If the first control system fails and the second control system becomes the main system to control the switch machine 1, the relay contact NWLR3 or RWLR3 is lifted at the start of the switching operation, so that the second control system becomes the main system and controls the switch machine 1. 2 Check relay TCHR2 is energized and its contact T
CHR2 is lifted up and the energizing circuit A of the first control system is disconnected from the magnetic retention relay WR. In addition, when the conversion operation is completed, the relay contact N
WLR3 or RWLR3 falls, the second check relay TCHR2 is demagnetized, its contact TCHR2 falls, and the first
An energizing circuit A of the control system is connected to a magnetic holding relay WR.

According to this configuration, when the main system is not controlled, both control systems are connected to the switch machine 1 side, and a back shunt circuit is configured in both control systems, so that switching of the control system is not possible. At times, the energizing circuit of the point machine 1 does not become open, and malfunctions of the point machine 1 due to the influence of external noise etc. can be reliably prevented. Furthermore, while the main system is under control, the slave system is electrically disconnected, so it is not affected by the slave system.

<Effects of the Invention> As explained above, according to the present invention, when the main system is not under control, both the main and slave control systems are electrically connected to the switch machine side, and each short circuit is closed. The current-carrying circuit of the point machine was kept short-circuited, and the slave system was electrically disconnected from the switch side while main system 2 was being controlled. Malfunction of the switch machine can be prevented since the energized circuit will not become open. Furthermore, the influence from the slave system does not affect the main system during control. Therefore, the reliability of control can be further improved.

[Brief explanation of drawings]

The drawing is a circuit configuration diagram showing an embodiment of the present invention. ■...Point machine 11.21...CPU 1
2,22...Switch machine control circuit 14.24...
Conversion-short circuit TCHR1...1st check relay
TCHR2...Second check relay T] (R1
, TCHR2...Check relay contact NWLR
3, RWLR3... Relay contact WR... Magnetic holding relay A, B... Energizing circuit

Claims (1)

[Claims] A control device for an electric point machine configured as a dual system, which has two control systems of the same configuration, and when one control system fails, switches to the other control system to drive and control the electric point machine. , a switching circuit is provided in both control systems and configures the energizing circuit of the point machine based on the switching command signal; A short-circuit circuit that short-circuits and a current-carrying circuit between the other control system and the switch machine are disconnected when the conversion command signal is input to one control system and connected when the conversion operation completion detection signal is input. a first switch means that disconnects the current-carrying circuit between one control system and the switch machine when the conversion command signal is input to the other control system and connects the current-carrying circuit when the conversion operation completion detection signal is input. 1. A control device for an electric point machine, characterized in that it comprises two switch means.