JPS6047776B2 - Switching method for multiple configuration devices - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention automatically switches each of the multiple devices to a release or block state in response to various conditions or control signals originating from inside or outside the device, and This relates to a switching method in which only one device is in the released state.

In this conventional switching method, if one of the multiple devices is selected and a fault occurs in that device, the fault notification is received and the switch is automatically switched.
Alternatively, there is a method in which a maintenance person manually selects and blocks another device and releases the faulty device. FIG. 1 shows an example of a conventional switching method for dual-configuration devices.

In FIG. 1, the switching circuits 5 of the devices 2 and 3 monitor the fault signals ALMI, ALM2, and ALM3J of the device control section 4, data transmitting/receiving section 6, and power supply circuit section 7 in each device, and detect when a fault occurs in any one of them. In this case, a device fault signal EALM2 or EALM3 is sent to the supervisory control device 1 to cause it to display something. On the other hand, the monitoring control device 1 sends a device switching command signal EC2 or EC3 to each device 2, 3 and controls the sending device control section 4 using a control signal CTL. This method has the disadvantage that if a failure occurs in the monitoring and control device 1 itself in the connection line between the device 2 or 3 and the monitoring and control device 1, or if the device is manually switched, the entire system will stop. . It is an object of the present invention to provide a switching scheme which eliminates the aforementioned drawbacks and improves the reliability of the overall system.

The switching method of the present invention is characterized in that the switching of devices is not only carried out by an external monitoring and control device, but also that devices in a multi-configuration mutually monitor the status of other devices so that any one device is always in the released state. It is something to do.

In addition, all operations can be controlled by a manual operation installed in each device, and even if the power to all devices is temporarily turned off, one of the devices can be turned off after recovery. be. The present invention will be described in detail below with reference to FIGS. 2 and 3. In FIG. 2, devices 9 and 10 further include a manual control section 12 in addition to the devices 2 and 3 in FIG. A monitoring and control device 8 is provided instead. MO and MB are command signals for release and closure by manual switch, RST
is a status signal for power-on reset of the entire device, PRI is a status signal that determines the priority of the device, EALM9 and 10 are signals for reporting failure status of devices 9 and 10, EC
is a device switching command signal for switching the state of devices 9 and 10, and RDY9 and RDY1O are device switching command signals for switching the state of devices 9 and 10, and RDY9 and RDY10 are device switching command signals MO or ? The device normal standby signals ACT9 and ACTlO, which are at low level when not in operation, are at high level. This is a device release/blocking state signal which indicates that the device is in the released state when it is at a low level, and indicates that it is in the blocked state when it is at a low level, and the circuit 81 is a circuit that generates a pulse type device switching command signal EC. Other numerals correspond to parts with the same numerals in FIG. FIG. 3 shows a specific example of the switching circuit according to the present invention.

In FIG. 3, 13 is a device state detection circuit, and first,
When any one of the failure signals ALM1 to 3 of the own device becomes high level, the device failure signal EAL is output through the gate 1314.
, M9 are set to a high level to notify the supervisory control device 8 of the occurrence of a fault, and the fault signal ALM is set to a high level. Further, a manual operation state signal RVlAL which becomes high level when the device is under manual control is inputted, and a device normal standby signal RDY9 is outputted by the gate 132. As mentioned above, this signal indicates whether the manual operation status signal MAL is high level or the failure signal A.
The level becomes high when any one of LM1 to LM3 is at a high level. Further, the device normal standby signal RDYlO from the device 10 is inputted, and the both device normal standby signal BRDY is inputted by the gate 133.
Output. This signal becomes low level only when both the RDY9 and RDY1O signals are low level, indicating that both devices are in a normal standby state. 14 is a manual control detection circuit which inputs the manual release signal MO and manual blockage signal ■ from the manual control section of its own device, outputs the manual release control signal MOC and manual blockage control signal MBC, and also outputs the manual release control signal MOC and manual blockage control signal MBC. gate 141 when MO is low level or MB is high level
A high-level manual operation status signal MAL is output through.

15 is a device initial state setting circuit which inputs the device reset signal RST from the manual control statement 12 of the device and outputs the device reset signal RST from the manual control statement 12 of the device;
When the T signal is at a low level, the reset control signal RSTC is output at a high level, and when the RST signal changes from a low level to a high level, a positive pulse is sent from the gate 151 to the gate 152 by the pulse generating circuit shown in the figure. Output.

In addition, this circuit inputs the device priority signal PRI, the RDY9 signal obtained by impairing the normal standby signal of its own device, the device normal standby signal RDYlO from the device 10, and the device release/block state signal ACTlO from the device 10, and performs the following logic. Gate 15
1 and 152 to output a reset off control signal which is a more positive pulse signal. First, the gate 151 outputs a positive pulse when the RST signal changes from low to high level, when the device 10 is not in the blocked state and normal standby state, and the own device is in the normal standby state and has no priority. . gate 15
2 similarly outputs a positive pulse when the device 10 is in a closed state and its own device is in a normal standby state and has priority. Reference numeral 161 denotes a device switching command signal receiving circuit, which receives the device switching command signal EC with a positive pulse from the supervisory control device 8, the device priority signal PRI, and the device normal standby signal RDYlO of the device 10.
Then, the RDY9 signal, the device release/blocking state signal ACTlO of the device 10, the BRDY signal obtained by inverting the normal standby signal for both devices, and the control signal CTL for controlling the own device are inputted to each OR gate 161 to 163 to the switching command pulse signal E, which is a positive pulse signal in the following cases.
Output CP.

Upon receiving the EC signal, the gate 161 outputs a positive pulse signal E if its own device is in a released state and the device 10 is in a normal standby state.
CP is output, and the gate 162 outputs the CP when the own device is in the blocked state. When the device 10 is in a normal standby state and is in a blocked state and not in a normal standby state, the gate 163 outputs a positive pulse signal ECP, and the gate 163 outputs a positive pulse signal ECP when the device 10 and the device 10 are both in a blocked state and in a normal standby state and the own device has priority. In certain cases, a positive pulse signal ECP is output. 17 is an opposite device interface circuit, which receives device release/blocking state signal ACT from device 10;
By inputting lO and the RDY9 signal, the pulse generating circuit shown in the figure outputs a positive pulse when the ACTlO signal changes from low to high level, and outputs a release pulse signal 0P when the own device is in a normal standby state. , outputs a blockage pulse signal BP when the level changes from high to low.

Reference numeral 18 denotes a device state switching circuit, which switches the state of a flip-flop circuit through a gate 181 when any one of the manual blocking control signal MBC of the circuit 14, the reset control signal RSTC of the circuit 15, and the blocking pulse signal BP of the circuit 17 becomes high level. 183 to set the device release/blocking state signal ACT9 of the own device to a high level, and control signal CTL.
to a high level.

Furthermore, when any one of the manual release control signal MOC of the circuit 14, the reset-off control signal ROC of the circuit 15, and the release pulse signal 0P of the circuit 17 becomes high level, the gate 1 is activated.
The clip-flop circuit 83 is cleared through 82 to make the ACT9 signal and CTL signal low level. Furthermore, when the output of the 7 terminal of the circuit 183 is at a high level, that is, when the device itself is in the released state, if the failure signal ALM from the circuit 13 becomes a high level, the input level of the CK terminal of the flip-flop circuit 183 is changed through gates 184 and 185. The output level of one terminal is changed from high to low level only when the circle and CL terminals are at low level, and the output signal AC is changed from low to high level.
Change the T9 and CTL levels from low to high.
Also, when the switching command pulse signal ECP from the circuit 16 is input, PS. If the l5CL terminal is at a low level, the levels of the output signals ACT and CTL of the circuit 18 are changed. The above is an explanation of the operation of each symbol in FIGS. 2 and 3, and next, how the switching circuit of the present invention operates will be explained.

First, when both devices 9 and 10 transition from the power-off state to the power-on state, and both devices are in a normal standby state and are not manually controlled, the circuit 15 operates and the device 9 (which has been given priority) ( Here, let us assume that the PRI signal of device 9 is set to high level and that of device 10 is set to low level).
The C signal is generated and the circuit 18 outputs the ACT9 signal and CTL.
The signal is set to low level to enter the release state, and on the device 10 side, since the input ACT9 signal changes from high to low level, the BP signal is output from the circuit 17 and the output ACT of the circuit 18 is changed.
The IO signal and CTL signal remain at high level to maintain the occlusion state.

Now, in this state, when the EC signal is input to both devices, circuit 1
6 generates an ECP signal on the device 9 side, and the circuit 18 changes the ACT9 and CTL signals to high level, so the device 1
On the 0 side, the circuit 17 generates a 0P signal, and the circuit 18
As a result, the ACT(!l:CTL signal is set to a low level, and the device 9 is blocked and the device 10 is shifted to the released state.Furthermore, if a failure occurs in the device 10 in the current state, AI.Ml~3
Since one of the two becomes high level, R due to the action of circuit 13.
The output signal of DYlO and the ALM signal go to high level, and the output signals ACTlO and CTL change to high level due to the operation of circuit 18, so on the side of device 9, circuits 17 and 18 operate as described above to release the signal. state, and the device 10 enters a closed state. Here, when the device 9 is manually operated to generate MD Kungo, the circuit 14 works and the MBC signal is output, and the circuit 18
By presetting circuit 183 of ACT9, device 9 is forcibly placed in a closed state, but on the device 10 side, even if circuit 17 detects a change in the ACT9 signal from low to high level, it does not indicate that a fault has occurred in the device itself. Therefore, the 0P signal cannot be output and the blockage state remains. Furthermore, after recovering the fault in device 10, E is sent to both devices while device 5 remains manually blocked.
When the C signal is input, the circuit 16 operates and the device 10 shifts to the release state, and the device 9 remains in the closed state. Even if the EC signal is inputted to both devices again in this state, device 10 and device 9 are not in the normal standby state and will not be blocked, and both devices will maintain their current state. As explained above, according to the present invention, even if there is no external monitoring and control device, after the system is powered on and reset, if at least one of a plurality of devices is normal, the device is automatically is in the released state, and from then on, only one of the normal devices will be released unless there is an external or manual operation.

Further, even if a switching command is received from an external monitoring control device, if the command is inappropriate, it can be ignored. From the above, the probability and time of system downtime can be reduced, and its reliability and maintainability can be improved.

[Brief explanation of drawings]

FIG. 1 shows an example of a switching method for a conventional dual configuration device, FIG. 2 shows an example of a switching method for a dual configuration device according to the present invention, and FIG. 3 shows a specific example of a switching circuit according to the present invention.

Claims (1)

[Claims] 1 A plurality of first devices in a multiplex configuration, and a second device that monitors these first devices and selectively controls only one of them.
In the switching method of multiple configuration devices including a device, each of the first devices includes a device normal standby signal for communicating the normal standby state of the first device;
A device release blockage state signal for switching the state of the device from blockage to release or from release to blockage is prepared as an interface between the first device, and monitors the state of the first device itself. a device state detection circuit that inputs the device normal standby signal from another first device, generates an all device normal standby signal and a device failure signal, and outputs the device normal standby signal to the other first device; A device block signal for switching the device to a block state and a device release signal to switch the device to a release state are generated from the device normal standby signal outputted from the device state detection circuit and the device release block state signal from another first device. A device failure signal outputted from the device status detection circuit, a device block signal and a device release signal outputted from the device state detection circuit are inputted to the device interface circuit to be output, and the first
at least one of the first device and the second device; 1. A switching method for a multi-component device, characterized in that all states of the first device are automatically switched in response to a control command from the first device.