JP2009215052A - Data transmission system for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To diagnose whether a non-response of a transmission on the side of a transmission slave station is caused by an abnormality of a power source on the side of the slave station or caused by an abnormality of a host processor on the side of the slave station. <P>SOLUTION: When an abnormal diagnosis control means 101 outputs an operation check command with an operation check code D1 and a check parameter D2 added, a local processor operation check means 102 receives the command and performs an operation check with respect to a local host processor 1. A transmission control circuit 2 returns a check result to the abnormal diagnosis control means 101. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elevator data transmission system that transmits and receives data between a transmission master station and a plurality of transmission slave stations via a control transmission line.

  The elevator system is composed of, for example, a hall call button, a car call button, a door opening / closing device, and many other devices, and these many devices are controlled by various controllers. These controllers are controlled by an elevator controller. Since data transmission is performed between the elevator controller and the plurality of controllers via a control transmission line, from the viewpoint of the data transmission system, the elevator controller is a transmission master station, and the plurality of controllers are the transmission slave stations. Become.

Elevator systems in recent years have become highly functional and multifunctional, and in order to realize these functions, both the transmission master station side and the transmission slave station side are equipped with a host processor, and various types are provided via a transmission control circuit and various interfaces. Control based on a complicated program is performed (for example, Patent Document 1).
JP 2008-50107 A

  By the way, during transmission control, some transmission slave stations may cause transmission abnormalities such as no transmission response. The cause of the transmission non-response in this way is when the host processor of the transmission slave station itself is operating abnormally, or when the host processor itself is normal but power is not supplied to the host processor. There are two possible cases.

  Depending on which case is the cause of non-transmission, there are different ways to deal with system recovery. However, the conventional system cannot identify the cause of non-transmission for a long time. Had to spend.

  The present invention has been made in view of the above circumstances, and diagnoses whether transmission non-response on the transmission slave station side is caused by a power supply abnormality on the slave station side or an abnormality of a host processor on the slave station side. It is an object of the present invention to provide a data transmission system for an elevator.

  As a means for solving the above problems, the present invention provides an abnormality that is provided in a transmission master station connected to a plurality of transmission slave stations via a control transmission line and outputs an operation check command to the plurality of transmission slave stations. Provided in diagnosis control means and transmission control circuits of a plurality of transmission slave stations, execute a predetermined operation check on the local processor based on an operation check command from the abnormality diagnosis management means, and send the check result to the abnormality diagnosis management means And a local processor operation check means for returning the mobile station.

  According to the present invention, it is possible to diagnose whether the transmission non-response on the transmission slave station side is caused by the power supply abnormality on the slave station side or the abnormality of the host processor on the slave station side.

  FIG. 1 is an overall configuration diagram of an elevator data transmission system according to an embodiment of the present invention. In this figure, a transmission master station A as a master controller and a plurality of transmission slave stations B1 to Bn as slave controllers are connected via a control transmission line L.

  The transmission master station A is, for example, an elevator control device that controls the entire elevator system, and is arranged in an elevator control panel installed at a predetermined location.

  The transmission slave stations B1 to Bn include, for example, a plurality of hall controllers, a car controller, or a security device connection device.

  The hall controller is a controller provided in the hall of each floor, and transmits a hall call input signal based on the operation of the passenger hall call button to the transmission master station A, and turns on / off the hall call button. Or control.

  Similarly, the car controller is a controller provided in the car, and transmits a car call input signal based on the operation of the car call button of the passenger to the transmission master station A, and turns on / off the car call button. Or control.

  The security device connection device is a controller that mediates data transmission between the security device and the transmission master station A. As an example of the security device, for example, there is an authentication device that identifies whether a passenger is registered as a person who is permitted to use an elevator.

  In the configuration of FIG. 1, so-called cyclic transmission is performed between the transmission master station A and the transmission slave stations B1 to Bn by a serial system. FIG. 2 is an explanatory diagram of this cyclic transmission. This cyclic transmission is divided into “master talker transmission” when the master side transmits data to the slave side and “master listener transmission” when the master side receives data from the slave side.

  That is, “master talker transmission” in FIG. 2 (a) means that when the master controller attempts to send data to the slave controller, the master controller adds address data and information data (present data) to the transmission line. In the specification, data other than address data and the data body to be transmitted is called “information data”), and a slave controller having an address that matches the address data is transmitted on the transmission line. The information data that flows after is taken in.

  Further, “master listener transmission” in FIG. 2B means that when the master controller is to receive data from the slave controller, only the address data with the CRC data added to the transmission line is sent by the master controller. A slave controller having an address that matches this address data transmits information data with CRC data added to the master controller via a transmission line.

  FIG. 3 is a block diagram showing the configuration of the transmission master station A in FIG. As shown in this figure, the transmission master station A has a host processor 1, a transmission control circuit 2, an RS485 interface 3, a common RAM 4, an EEPROM 5, and a processor RAM 6.

  The host processor 1 performs car operation control and creation of transmission data contents, and is connected to the transmission control circuit 2 via a bus control line 7 through which bus control signals pass and a local bus line 8 through which information data passes. ing.

  The transmission control circuit 2 is connected via a RAM input / output line 11 to a common RAM 4 in which transmission setting data, transmission input / output data, and the like are stored. Then, by sending an access request from the host processor 1 to the transmission control circuit 2, the transmission control circuit 2 performs data input / output with the common RAM 4.

  The RS485 interface 3 outputs a transmission signal sent from the transmission control circuit 2 via the transmission line 9 on the control transmission line L, and receives a reception signal from the control transmission line L through the reception line 10. Output to the transmission control circuit 2. That is, the transmission control circuit 2 is connected to the control transmission line L via the RS485 interface 3.

  When the transmission control circuit 2 receives a transmission execution command from the host processor 1, the transmission control circuit 2 reads transmission operation setting data from the common RAM 4, and performs transmission / reception processing according to the contents of the data. The transmission control circuit 2 is connected to the EEPROM 5 via the ROM input / output line 12, and at initialization, the type data and transmission operation setting data are extracted from the EEPROM 5 and stored in the common RAM 4. ing. Further, the transmission control circuit 2 can write the transmission operation setting data stored in the common RAM 4 in the EEPROM 5 in response to a command from the host processor 1.

  The host processor 1 receives various diagnostic information and operation information from the transmission slave stations B1 to Bn via the control transmission line L, the RS485 interface 3, the transmission control circuit 2, and the like, and further receives these pieces of information in the processor RAM 6 To save.

  FIG. 4 is a block diagram showing the configuration of the transmission slave station B1 in FIG. 1 (the configuration of the transmission slave stations B2 to Bn is also the same). Since the transmission master station A in FIG. 3 has the same configuration except that the processor RAM 6 is omitted, the description of each component will be omitted.

  FIG. 5 is a block diagram showing a configuration of the transmission control circuit 2 in FIG. 3 or FIG. As shown in this figure, the transmission control circuit 2 includes a bus interface 21, a transmission interface circuit 22, a RAM interface 23, a ROM interface 24, and a process control circuit 25. These components are exchanged with various input / output signals indicated by reference numerals S1 to S7.

  The bus interface 21 stores the operation setting from the host processor 1 in an internal register. This operation setting includes transmission start, operation mode, timeout time, and the like. The operation setting data stored in the internal register is transmitted to the process control circuit 25 by the bus IF / process CC input / output signal S2. Further, the host processor 1 can read out the transmission abnormality information related to the transmission abnormality occurrence state and the number of times stored in the internal register. The control transmission operation settings and transmission abnormality information are also transmitted to the transmission interface circuit 22 by the bus IF / transmission IF input / output signal S3. The bus interface 21 exchanges data with the RAM interface 23 by a bus IF / RAMIF input / output signal S1 when an access request is made to the common RAM 4.

  The transmission interface circuit 22 starts the transmission operation when receiving the transmission operation setting data from the bus interface 21 by the bus IF / transmission IF input / output signal S3. In this case, the transmission interface circuit 22 requests the RAM interface 23 to read the setting data stored in the common RAM 4, and obtains the setting data by the transmission IF / RAMIF input / output signal S5. Then, the transmission interface circuit 22 performs a transmission / reception operation via the transmission line 9 and the reception line 10 based on the acquired setting data. Further, the transmission interface circuit 22 sends the transmission state to the process control circuit 25 by the transmission IF / process CC input / output signal S4.

  The RAM interface 23 includes a bus IF / RAMIF input / output signal S 1 from the bus interface 21, a RAMIF / process CC input / output signal S 6 from the process control circuit 25, and a transmission IF / RAMIF input / output signal S 5 from the transmission interface circuit 22. Three signals are received. When accessing the common RAM 4, one of these three signals is selected and data is input / output to / from the common RAM 4.

  The ROM interface 24 can exchange data with the process control circuit 25 by a process CC / ROMIF input / output signal S7. That is, the ROM interface 24 can extract setting data from the EEPROM 5 in accordance with a request from the process control circuit 25. The process control circuit 25 can transmit the setting data taken out by the ROM interface 24 to the RAM interface 23 by the RAMIF / process CC input / output signal S6 and write it to the common RAM 4.

  As described above, the process control circuit 25 uses the input / output signals S2, S4, S6, and S7 to transmit various setting data and transmissions between the bus interface 21, the transmission interface circuit 22, the RAM interface 23, and the ROM interface 24, respectively. Data can be input and output.

  The transmission master station A and the transmission slave stations B1 to Bn in FIG. 1 have the configuration shown in FIGS. 3 to 5 as described above, and perform cyclic transmission by the serial method described in FIG. That is why.

  The elevator system is operated based on the serial transmission between the transmission master station A and the transmission slave stations B1 to Bn. The transmission master station A transmits regularly or irregularly. An abnormality diagnosis is performed on the slave stations B1 to Bn.

  FIG. 6 is an explanatory diagram of this abnormality diagnosis function in this transmission system. For the convenience of drawing space, only the transmission slave station B1 is shown on the transmission slave station side, and the other transmission slave stations B2 to Bn are not shown.

  In FIG. 6, the host processor 1 of the transmission master station A is provided with an abnormality diagnosis management means 101. On the other hand, in the transmission slave station B 1, the local processor operation check means 102 is provided in the process control circuit 25 of the transmission control circuit 2.

  When the abnormality diagnosis management means 101 outputs an operation check command to which the operation check code D1 and the check parameter D2 are added, the local processor operation check means 102 receives this and performs an operation check on the host processor 1 of the local station. Execute. Then, the transmission control circuit 2 returns the check result to the abnormality diagnosis management means 101.

  That is, the process control circuit 25 has a main function of controlling data transmission, and is not a circuit having an advanced determination function like a microprocessor. Therefore, the process control circuit 25 cannot be provided with an “abnormal diagnosis” function which is an advanced function normally performed by a microprocessor. However, if the operation content is specified to some extent on the master station side, the process control circuit 25 can be provided with a simple abnormality diagnosis function to some extent. Therefore, in the present invention, the local station processor operation check means 102 is provided in the process control circuit 25 whose main function is control of data transmission, and the check result is returned to the abnormality diagnosis management means 101 on the parent station side. Thus, it is possible to perform an abnormality diagnosis with this.

  Here, the operation check code D1 is obtained by coding the type of operation check, and the check parameter D2 is a parameter used for the operation check.

  For example, there is a so-called “increment return” as a method for determining whether or not the host processor 1 of the slave station B1 is operating abnormally. The operation check code D1 specifies that this increment / return should be executed. it can. In this case, as the check parameter D2, it is possible to specify a time limit until the return data obtained by adding “1” to the transmission data from the host processor 1 side, the number of increment / return executions, and the like.

  In addition to the above-described increment / return, various types of operation checks can be set, such as requesting a reply of data obtained by inverting transmission data.

  The abnormality diagnosis management means 101 of the transmission master station A can grasp the control state of the transmission slave station B1 from the result of such an operation check. That is, if the increment / return executed by the local processor operation check means 102 of the process control circuit 25 is correctly performed, the host processor 1 is normal, and if the increment / return is performed incorrectly, the host processor 1 It turns out that it is abnormal. If no response is returned from the transmission slave station B1 to the operation check command from the abnormality diagnosis management means 101, it is understood that the power supply of the entire transmission slave station B1 is abnormal.

  FIG. 7 is a time chart showing the time zone of each operation check of the slave stations B1 to B4 when the number of slave stations is four. As shown in this figure, the operation check is performed in the order of the slave stations B1, B2, B3, and B4, and after the operation check of the slave station B4, the operation check is cyclically performed such that the operation returns to the slave station B1. To be done.

  FIG. 8 is an explanatory diagram for area allocation of operation check information. When the operation check by the local station processor operation check means 102 is completed, the operation check information, that is, the operation check execution slave station number and the operation check result are stored in the common RAM 4 (FIG. 4). In this case, the operation check information is stored in the same area of the common RAM 4 in each of the transmission slave stations B1 to Bn so that the data transmission processing is performed efficiently.

  Next, the operation of FIG. 6 will be described based on the flowchart of FIG. First, when the abnormality diagnosis management means 101 of the transmission master station A outputs an operation check command to which the operation check code D1 and the check parameter D2 are added, the process control circuit 25 of the transmission slave station B1 inputs this (step 1). .

  The own station processor operation check means 102 compares the input operation check code D1 with the operation check code currently held on the own station side to determine whether or not there is a change (step 2). Change processing is performed (step 3). The own station processor operation check means 102 also determines whether or not there is a change in the input check parameter D2 and the parameter currently held on the own station side (step 4), and performs a parameter change process if there is a change (step 4). Step 5).

  Next, the own station processor operation check means 102 performs an operation check on the host processor 1 which is the own station processor, using the operation check code D1 and the check parameter D2 (step 6). Then, an operation check result is assigned to a predetermined area as shown in FIG. 8 (step 7). Thereafter, the process control circuit 25 extracts the operation check result from the predetermined area, and returns the operation check result to the abnormality diagnosis management means 101 of the transmission master station A (step 8). When an abnormality is recognized in the host processor 1 of the transmission slave station B1, the abnormality diagnosis management means 101 can determine from the returned operation check result whether the abnormality is an operation abnormality.

  The abnormality diagnosis management means 101 has a function of accumulating the check results returned from the transmission slave station B1 for a certain period and learning the accumulated check results. Based on the learning result, the data contents of the operation check code D1 and the check parameter D2 designated for the transmission slave station B1 are appropriately updated.

  By the way, in this embodiment, it is assumed that the transmission slave stations B2 to Bn other than the transmission slave station B1 also individually return the operation check results to the transmission master station A sequentially. It is also possible to group a predetermined number of slave stations in advance so that efficient processing can be performed on both of the transmission slave stations B1 to Bn.

  FIG. 10 is an explanatory diagram of such grouping on the slave station side. The n transmission slave stations B1 to Bn shown in FIG. 1 are grouped into m (m <n) groups G1, G2,..., Gm as shown in FIG.

  The group G1 is composed of four transmission slave stations B1, B2, B3, and B4. Of these, the transmission slave station B1 becomes the “representative slave station” and other transmission slave stations B2, B3, and B4. Collect operation check results from. The transmission slave station B1 returns the collected check results of all the slave stations, which are a combination of the collected operation check results of the other stations and the operation check result of the own station, to the transmission master station A in a lump. Similarly, the groups G2,..., Gm also return the collection check results of all the slave stations in the group to the transmission master station A in a lump. By such a return process, the entire data transmission time and data transmission amount can be reduced.

  The representative slave station of each group can also add abnormality presence / absence information on a group basis when returning the collection check result to the transmission master station A. On the transmission master station A side, first, by checking the presence / absence information from each group first, it is possible to preferentially diagnose the group having the abnormality, and to quickly deal with the occurrence of the abnormality. It becomes like this.

  The representative slave station is not always assigned to the slave station B1, but is preferably changed to the slave stations B2, B3, and B4 sequentially based on preset rules. As a rule in this case, it is conceivable that the abnormality diagnosis is performed every time or every time a predetermined period elapses.

  Furthermore, for example, when an abnormality occurs in the slave station B3, the representative slave station B1 excludes the abnormal slave station B3 from the group G1, and thereafter transmits without including the check result of the slave station B3 in the collection check result. It can be returned to the master station A. In this case, the representative slave station B1 adds information notifying that the abnormal slave station B3 is excluded from the group G1 to the collection check result and returns it to the transmission master station A.

1 is an overall configuration diagram of an elevator data transmission system according to an embodiment of the present invention. Explanatory drawing about cyclic transmission performed between the transmission master station A and the transmission slave stations B1 to Bn in FIG. The block diagram which shows the structure of the transmission main station A in FIG. The block diagram which shows the structure of transmission slave station B1 in FIG. The block diagram which shows the structure of the transmission control circuit 2 in FIG. 3 or FIG. Explanatory drawing about the abnormality diagnosis function in the transmission system of this invention. The time chart which showed the time slot | zone of each operation | movement check of slave station B1-B4 when the number of slave stations is four. Explanatory drawing about area allocation of operation check information. 7 is a flowchart for explaining the operation of FIG. Explanatory drawing about grouping by the side of a slave station.

Explanation of symbols

A: Transmission master station B1 to Bn: Transmission slave station 1: Host processor 2: Transmission control circuit 3: RS485 interface 4: Common RAM
5: EEPROM
6: Processor RAM
7: Bus control line 8: Local bus line 9: Transmission line 10: Reception line 11: RAM input / output line 12: ROM input / output line 21: Bus interface 22: Transmission interface circuit 23: RAM interface 24: ROM interface 25: Process Control circuit S1: Bus IF / RAMIF input / output signal S2: Bus IF / process CC input / output signal S3: Bus IF / transmission IF input / output signal S4: Transmission IF / process CC input / output signal S5: Transmission IF / RAMIF input / output signal S6: RAMIF / process CC input / output signal S7: Process CC / ROMIF input / output signal 101: Fault diagnosis management means 102: Local processor operation check means G1, G2,..., Gm: Group

Claims (7)

An abnormality diagnosis management means provided in a transmission master station connected to a plurality of transmission slave stations via a control transmission line, and outputting an operation check command to the plurality of transmission slave stations;
Provided in transmission control circuits of the plurality of transmission slave stations, execute a predetermined operation check on the local processor based on an operation check command from the abnormality diagnosis management means, and return the check result to the abnormality diagnosis management means Own station processor operation checking means;
An elevator data transmission system comprising: The abnormality diagnosis management means specifies a check item and a parameter used for the check when outputting the operation check command,
The own station processor operation check means executes a predetermined operation check using the specified check item and parameter.
The elevator data transmission system according to claim 1. The abnormality diagnosis management means accumulates the check results returned from the local processor operation check means, and updates the check items and parameters based on learning for the accumulation check results.
The elevator data transmission system according to claim 2. The plurality of transmission slave stations are grouped in advance for each predetermined number of slave stations, and any one slave station in the same group becomes a representative slave station representing the group, and the check results of other slave stations are obtained. Collect and return the collection check results of all the slave stations in the group to the abnormality diagnosis management means of the transmission master station,
The elevator data transmission system according to claim 1. The representative slave station adds abnormality presence / absence information in units of groups when returning the collection check result to the abnormality diagnosis management means.
The elevator data transmission system according to claim 4. The representative slave stations are sequentially changed based on a preset rule.
The elevator data transmission system according to claim 4. When the abnormal slave station occurs, the representative slave station excludes the abnormal slave station from the group, and adds information indicating that the slave station is excluded to the collection check result.
The elevator data transmission system according to claim 4.

Images