JP6148523B2 - Inverter control device - Google Patents

Description

  Embodiments described herein relate generally to an inverter device control device.

  Some inverter devices have a function of automatically acquiring internal monitor data during operation or stopping and storing it in a nonvolatile memory. In such an inverter device, the operation status can be checked by analyzing the monitor data stored in the non-volatile memory during inspection work or when the operation is stopped, or the output current or input voltage when the operation is stopped due to a protective operation or the like. Etc. can be confirmed. As a result, it is possible to check and adjust the load status, or to investigate the cause and take measures during the protection operation.

  Regarding acquisition of such monitor data, for example, after a protective operation is performed and the inverter device is stopped, there is a case where it is desired to set monitor data related to the protective operation as an acquisition target rather than preset data. In addition, once the protection operation has occurred, there may be a case where it is desired to take measures so that the protection operation does not occur again.

  However, in this case, the monitor data acquisition target change setting and parameter change setting are set by the user himself so that the monitor data related to the protection operation can be estimated and appropriate monitor data can be acquired. There was a need to do. In addition, even when there is an indication that a protective action has occurred, even if the protective action is not to be reached, the user can change and set the protective action conditions by changing the setting value of the corresponding parameter. It was necessary to make adjustments so that no movement occurred.

  For this reason, in order to appropriately cope with such a case, the user needs specialized knowledge about the load of the inverter device and the electric motor driven by the inverter device, and sees a manual etc. at the time of setting work. Therefore, it is difficult for users who are not accustomed to use it.

JP 2007-135325 A

  Therefore, with regard to monitor data acquisition and parameter setting of the inverter device, the user must perform troublesome work when determining the monitor data acquisition target for acquiring data resulting from the protection operation after the protection operation has occurred. It is an object of the present invention to provide a control device for an inverter device that can be set without any problems.

Control device for an inverter device of the present embodiment, in the control device of the inverter device that drives and controls the inverter with the set control content by the control parameter, can display the control parameters set for the previous listening inverter device Display means, parameter setting means for setting the control parameters or changing the set control parameters, storage means for storing the control parameter states, and monitoring the operating state of the inverter device or the load Control means for storing the monitor data obtained in this manner in the storage means, and the control means is a factor of the protection operation when the protection operation is executed and the operation is stopped in the operation control of the inverter device. Is displayed on the display means and stored in the storage means. The monitor data related to the protection operation is set as a setting value corresponding to the acquisition target monitor in the control parameter that determines the data trace function acquisition target of the data, and the same protection operation is performed again after the protection operation is executed. When the control is executed, control parameters that need to be adjusted in order to avoid the protection operation being performed during the subsequent operation are displayed on the display means.

The block block diagram of the inverter apparatus which concerns on 1st Embodiment. Diagram showing RAM address space Correspondence diagram of acquisition target monitor set by control parameter Address correspondence between control parameters and acquisition target monitor Diagram showing set values of control parameters before and after protection operation Figure showing monitor data related to protection factor Diagram showing control parameters for setting monitor data sampling time Correspondence diagram of monitor related to application Diagram showing the related monitor priority for overload protection Flow chart of monitor setting when protection operation is executed Flowchart of display control when protection operation according to second embodiment is repeated Flowchart of processing for setting sampling time during protection operation according to the fourth embodiment The flowchart which controls the monitor setting at the time of the protection operation based on 6th Embodiment according to a priority. Flowchart of monitor data processing when protection operation according to the eighth embodiment is repeated

Hereinafter, a plurality of embodiments will be described with reference to the drawings. In addition, in each embodiment, the same code | symbol is attached | subjected to the substantially same component, and description is abbreviate | omitted.
(First embodiment)
A first embodiment will be described with reference to FIGS. FIG. 1 shows a block configuration of the inverter device 1. In FIG. 1, an inverter device 1 is mainly composed of an inverter circuit 2 and a control device 3 as a control means for driving and controlling the inverter circuit 2. The inverter circuit unit 2 is provided so as to drive, for example, an electric motor as a load, and is supplied with a drive signal from the control device 3 to convert the DC power into a predetermined AC power and supply the load to the load. The control device 3 is provided with a random access memory (RAM) 3a as a temporary storage unit. The control device 3 is connected to a nonvolatile memory 4 that stores data even after the power is turned off. The RAM 3a and the nonvolatile memory 4 function as storage means.

  As the nonvolatile memory, in addition to a semiconductor memory such as a flash memory, a hard disk device or a device that records on a recording medium can also be used. Moreover, it can also be set as the structure which provides either RAM3a or the non-volatile memory 4 as a memory | storage means. It is only necessary to provide a storage means that can store the monitor data and that stores the stored information even after the power supply is stopped.

  The nonvolatile memory 4 stores a program for driving and controlling the load in advance, and when the power is turned on, the program is read out and temporarily stored in the RAM 3a to execute the control operation. As shown in FIG. 2, the RAM 3a includes a region M1 for storing a program, a region M2 for storing control parameters, regions M3 to Mn for storing trace data, and an unused region Ms as storage regions.

  Specifically, for example, addresses are assigned as follows in correspondence with the storage areas of the RAM 3a. The address is indicated by a 4-digit hexadecimal number, and the hexadecimal number is indicated by “0x”.

M1 main unit program use area 0x0000 to 0x10XW address M2 control parameter storage area 0x10XX to 0xE033 address M3 trace data use area 1 0xE034 to 0xE133 address
...
Mn Trace data use area X 0xE434 to 0xE533 addresses Ms Unused area 0xE534 to 0xFFFF addresses These address assignments can be changed and set as appropriate.

Connected to the control device 3 is an input unit 5 having switches and keys for performing operation input by the user. The input unit 5 functions as parameter setting means, and can perform various setting inputs and switching operations using switches. A display unit 6 is connected to the control device 3 as display means for displaying the state of the inverter device 1 and the set value. The display unit 6 uses, for example, a 7-segment display of 4-digit LEDs. For the display unit 6, various types such as a liquid crystal display can be used.
The control device 3 is connected to a communication unit 7 and input / output terminals 8 and 9 for exchanging information with an external device. The inverter device 1 can be driven and controlled by an external device via the communication unit 7 or the input / output terminals 8 and 9 and monitor data can be acquired.

Next, various control parameters set for the inverter device 1 will be described.
The inverter device 1 is configured so that a plurality of control parameters can be set in order to monitor and record the operating or stopped state and the operation content during the operation of the load. The setting can be made by the user through the display of the display unit 6 and the input unit 5. For example, the number of control parameters that can be monitored can be set to four from xx1 to xx4 (or six from xx6). Note that the control parameter number and the monitor number are represented by a three-digit hexadecimal number, and “0x” indicating the hexadecimal number is omitted.

  As shown in FIG. 3, the acquisition target monitor is set to “0” as a setting value for not setting monitor data acquisition, and the acquisition target monitor items that can be set are, for example, “1” to “12”. Twelve items are set. When any of the control parameter numbers (xx1 to xx4) is designated from the setting value “1” to “11”, “output frequency”, “output current”,..., “Inverter status”, etc. The acquisition target monitor can be set. When the acquisition target monitor is set, as shown in FIG. 3, the sampling time is typically set by default. The user can change and set the sampling time separately.

  Further, for the setting value “12” as the acquisition target monitor, an acquisition target monitor that is not shown in the acquisition target monitors “1” to “11” can be set. In this case, when the set value “12” is designated, the monitor data and the control parameter value described in the address separately designated in the corresponding control parameter number xxn (any one of xx1 to xx4) are acquired. Set to

  The control device 3 stores the acquisition target monitor data designated by the control parameter numbers xx1 to xx4 in the corresponding areas of the trace data use areas M3 to M6 of the RAM 3a shown in FIG.

  FIG. 5 shows an example in which the setting values of the acquisition target monitor are set for the control parameters such as numbers xx1 and xx2. In this example, 0xE034 to 0xE133 corresponding to the trace data use area M3 is designated as the control parameter number xx1 as the address space in which the data is stored. In addition, the setting number of the acquisition target monitor before the protection operation is set to “1”, that is, “output frequency”, and the setting number after the protection operation is set to “2”, that is, “output current”.

  In addition, as the control parameter number xx2, 0xE134 to 0xE233 corresponding to the trace data use area M4 is designated as an address space in which data is stored. In addition, the setting number of the acquisition target monitor before the protection operation is set to “2”, that is, “output current”, and the setting number after the protection operation is set to “10”, that is, “inverter overload ratio”. In this case, the control parameter related to the protection operation is set as the setting after the protection operation.

  The protection operation includes a “trip operation” in which an abnormality occurs in the operation of the inverter device 1 and the control device 3 stops the operation, and an “alarm operation” informing that the trip operation is performed if this state continues before the trip operation is reached. There is. During the alarm operation, the inverter device 1 is still in operation, and the control device 3 may cancel the alarm operation if an abnormal state is avoided before reaching the “trip operation”.

  FIG. 6 shows association data for performing processing related to the case where the protection operation occurs. When a trip operation occurs as a protection operation, the relationship between the protection operation factor and display, the alarm operation factor and display, related monitor data, and related parameters are shown. For example, in the case of an overcurrent protection trip operation, the display is displayed as “OC”, and in the case of an alarm operation, the display is displayed as “C”. Further, “output current” and “output frequency” are associated as related monitor data, and “acceleration time (ACC)” is associated as related parameters.

  Similarly, in the case of an overload protection trip operation, the display is displayed as “OL”, and in the case of an alarm operation, the display is displayed as “L”. Further, as the related monitor data, “output current”, “inverter overload ratio”, and “inverter status” are associated. As related parameters, “acceleration time (ACC)” is associated with “output current”, and “acceleration time” and “DC braking time” are associated with “inverter overload rate” and “inverter status”. It is done.

In the case of an overtorque trip operation, the display is displayed as “OT”, and in the case of an alarm operation, the display is displayed as “T”. Further, “torque” is associated with the related monitor data, and “torque limit amount” is associated with the related parameter.
As the display operation of the display unit 6 in the above-described protection operation, the display is turned on during the trip operation, and the display is blinked during the alarm operation to urge the user to perform the protection operation.

  FIG. 7 shows parameters for setting the sampling time. Although FIG. 3 shows that the sampling time for the setting of each acquisition countermeasure monitor is set by default as a standard, it is a setting parameter when the user separately sets instead of the default setting. By setting this parameter, data is sampled at the set sampling time instead of the default sampling time.

  Next, the basic action during the protective operation of the inverter device 1 will be described with reference to FIG. In this embodiment, for normal drive control of the inverter device 1, the load is operated in accordance with conditions set for operation control as a control parameter. In the state where the inverter circuit unit 2 drives and controls the load, the control device 3 acquires the monitor data at the sampling time set corresponding to the acquisition target monitor item set as the control parameter described above, The data is sequentially stored in the corresponding addresses in the trace data use areas M3 to Mn in the RAM 3a.

  The control device 3 executes a trip operation or an alarm operation as a protective operation when any abnormality occurs while the inverter device 1 is being driven and controlled. There are a case where the trip operation is directly executed according to the cause of the abnormality, and a case where the trip operation is executed with the alarm operation being executed first and then continuing for a certain period of time.

The flowchart shown in FIG. 10 shows the contents of a program executed by the control device 3 at a predetermined cycle, and particularly shows the contents of control when a protection operation is performed. The control device 3 executes the program of FIG. 10 at a predetermined cycle, and terminates the program as it is when the protection operation is not executed.
When the trip operation or the alarm operation is performed (YES in S11), the control device 3 displays the cause of the trip operation or the alarm operation on the display unit 6 (S12). Further, the control device 3 stores a factor of the protection operation in the nonvolatile memory 4 when the trip operation is performed as the protection operation and the operation of the inverter circuit unit 2 is stopped.

  Thereafter, the control device 3 determines whether or not there is a monitor setting at the time of the protection operation (S13), and when the setting by the user has already been made and monitoring is possible (YES in S13). Exit the program. In addition, when the monitor setting by the user is not made (NO in S13), the control device 3 acquires monitor data related to a trip or an alarm where the control parameters xx1 to xxX can be set. Set up.

For example, as shown in FIG. 5, the items set as acquisition targets of the user's monitor data are set as “output frequency” of “1” as control parameter xx1 and “output current” of “2” as xx2. If so, change the settings as follows: When the overload protection operation occurs as the protection operation, the control device 3 sets the “output current” of “2” as the control parameter xx1 and the “inverter overload ratio” of “10” as xx2 after the protection operation. change.
As a result, when the protection operation occurs repeatedly due to the same cause, the related monitor data is acquired, so the factor analysis becomes easy and the user can save labor for estimating the factor, improving the usability. Can be planned.

When the above operation is performed, an alarm operation is also targeted as the protection operation, and thus a protection operation in which the alarm operation is executed may be executed prior to the trip operation. In this case, the control device 3 automatically performs the change setting so as to obtain the monitor data related to the target protection operation for the setting of the control parameter after the protection operation during the alarm operation as the protection operation. Do.
Thus, if an alarm operation occurs before the protective operation is performed on the inverter device 1, the alarm recorded in the trace data use area 17 of FIG. It is possible to automatically set related monitor data.
As a result, when the protective operation is finally performed on the inverter device, as in the embodiment of the first aspect, the effort that has been estimated and set by the user is reduced.

(Second Embodiment)
Next, an embodiment of the processing operation when the same protection operation occurs continuously will be described with reference to FIG. In the first embodiment, when the protection operation occurs, the monitor data related to the protection operation is set to be acquired. In this embodiment, the processing when the same protection operation occurs thereafter is performed. Show.

  That is, the control device 3 periodically determines whether or not the same protection operation has occurred with respect to the protection operation that occurred last time by executing the processing program of FIG. When executing the processing program, the control device 3 determines whether or not the same trip or a trip after the occurrence of an alarm has occurred continuously (S21). This is because, for example, when the trip operation is continuously generated as the protective operation and the operation of the inverter device 1 is stopped, or after the alarm operation is generated in the inverter device 1, the trip operation is finally generated as the protective operation. This corresponds to the case where the inverter device 1 is stopped.

In this case (YES in S21), the control device 3 reads out the control parameter for performing adjustment so that the same protection operation does not work again in the next operation from the monitor data stored in the trace data use area of the RAM 3. It displays on the display part 6 (S23-S25).
Specifically, for example, as shown in the first embodiment, when the overload protection is generated in the inverter device 1, as shown in FIG. Monitor data is acquired for “inverter overload rate” and “inverter status” and recorded in the corresponding trace data use area of the RAM 3.

When overload protection occurs again in the inverter device 1, the control device 3 determines that the protective operation has been performed on the inverter when the inverter overload rate reaches a constant value (YES in S 21). At this time, the control device 3 acquires the monitor data stored in the RAM 3 from the previous protection operation occurrence time (S22), and determines whether or not the cause of the protection operation can be estimated from this (S23).
In this determination, for example, when “DC braking” is ON as the content of the “inverter status” at this time, the control device 3 can determine that an overload protection operation has occurred due to DC braking (S23). YES) Subsequently, the control device 3 displays the control parameter for adjusting the DC braking time alternately with the display indicating the content of the protection operation on the display unit 5 (S24).

Further, if “acceleration status” is ON in the “inverter status”, the control device 3 can determine that the protection operation is activated due to “acceleration” when overload protection occurs (YES in S23). ). Subsequently, the control device 3 displays the control parameter for adjusting the acceleration time alternately with the display indicating the content of the protection operation on the display unit 5 (S24).
If the relationship with the related control parameter is not clarified from the acquired monitor data (NO in S23), the control device 3 cannot estimate the cause of the protective operation on the display unit 5. Is displayed on the display unit 6 (S25).

  As a result, after the protection operation is executed, the monitor data related to the protection operation factor can be automatically acquired, and the factor analysis can be easily performed based on the monitor data. It is possible to reduce time and effort to conduct analysis and investigate control parameters so that the cause does not occur.

  In the above case, when the display unit 6 is configured to use a liquid crystal display or the like, the display content can be increased. Therefore, the control device 3 sets the control parameters related to the protection operation together with the protection operation factor. You may display simultaneously.

  In the above description, the “inverter overload rate” and “inverter status” are set to be stored as trace data when the first overload protection occurs, and the trace data is used when the second overload protection occurs. The cause is determined, but when the first overload protection occurs, either "inverter overload rate" or "inverter status" is already stored in the trace data, and the cause can be determined from the stored data In this case, related parameters may be displayed. For example, if “Inverter status” is saved and the setting under acceleration is set to “ON” in “Inverter status”, when overload protection occurs, it is judged that the protection operation has been activated based on acceleration and displayed. The control parameter for adjusting the acceleration time may be displayed alternately with the display indicating the content of the protection operation on the unit 6.

(Third embodiment)
In this embodiment, in the configuration described above, by setting an arbitrary control parameter number in the acquisition target data of the data trace function in order to acquire monitor data, monitor data other than the acquisition control monitor shown in FIG. The control parameter data can be acquired.

For example, when the parameter number that determines where the operation command of the inverter device 1 is valid is 010, “12” is set in the control parameter xx1 shown in FIG. The case where 010 is set to the indicated control parameter will be described. Thereby, when the set value of the control parameter in FIG. 3 becomes “12”, the control parameter in FIG. 4 becomes valid. The operation command to the inverter device 1 includes the input unit 5, the communication unit 7, or the input terminal 8 of the inverter shown in FIG. 1, and the operation command can be switched during the operation. When the control operation is performed on the inverter device 1 by acquiring the monitor data of the control parameter by the data trace function, the control device 3 confirms the monitor data, thereby the input unit 5 and the communication unit 7. It is possible to determine whether the protective operation has been performed while any of the input terminals 8 is in operation.
Thus, after the protection operation is executed, the user can recognize at which command the protection operation has been performed without separately investigating, which is excellent in usability.

(Fourth embodiment)
Next, with reference to FIG. 12, the operation when the cause of the monitor setting in the first embodiment can be estimated better will be described. In this embodiment, when a trip operation or an alarm operation occurs as a protection operation, it is possible to change the sampling time of the currently set data trace monitor to a condition suitable for estimating the cause of the protection operation. It is what you do.

  As shown in FIG. 3, the sampling time for performing the data trace of the monitor to be acquired is preset by default according to another control parameter. Therefore, if the user does not set it separately, the sampling time is set in advance. An appropriate sampling time is set for each acquisition target monitor. In this case, as shown in FIG. 4, for example, the acquisition target monitor 1 (400) has a sampling time determined by the sampling time (402) of the acquisition target monitor 1. Therefore, by default, when “output frequency” of “1” is set in the acquisition target monitor 1 (400), the sampling time (402) of the acquisition target monitor 1 is “1” according to FIG. “10 ms” is set.

  On the other hand, as shown in FIG. 7, the sampling time desired by the user can be set corresponding to the acquisition target monitor. In this case, a parameter setting value corresponding to the sampling time to be set is set.

  The control device 3 executes the flowchart of the program shown in FIG. 12 at a predetermined cycle. Here, the flow is shown by way of example in the case where an alarm operation has occurred as the protection operation, but the same processing can be performed for the trip operation corresponding to the next and subsequent protection operations.

  When starting the program, the control device 3 determines whether an alarm operation has occurred (S31), and ends the program if no alarm operation has occurred. Further, when an alarm operation has occurred (YES in S31), the control device 3 causes the display unit 6 to display the cause of the alarm operation (S32). Thereafter, the control device 3 determines whether or not there is a monitor setting at the time of the protection operation (S33), and when the setting by the user has already been made and monitoring is possible (YES in S33). Exit the program. Further, when the monitor setting by the user is not made (NO in S33), the control device 3 acquires the monitor data related to the trip or the alarm where the control parameters xx1 to xxX can be set. Set up. Subsequently, the control device 3 applies the time with the shortest sampling time to all the monitor data settings for the monitor data settings set in the control parameters xx1 to xxX (S34).

  When the above program is executed, for example, when the setting value of the control parameter for performing data tracing is set to “3”, that is, data is acquired every second, when an alarm operation occurs as a protective operation, The control device 3 performs setting as follows. That is, the control parameters xx1 to xxX in FIG. 3 are switched to related parameters set in advance corresponding to the protection operation, and the monitor sampling time set in the control parameters xx1 to xxX in FIG. Set to the shortest sampling time. In this case, the sampling time is set to 5 ms, which is the shortest from the moment when the alarm operation occurs, and data is acquired at the sampling time. Thereafter, the control device 3 acquires data at intervals of 5 ms until the alarm operation is canceled or a trip operation is finally generated as a protection operation.

  Thus, after the protection operation is executed, the monitor data related to the protection operation factor can be automatically set to be acquired at the sampling time set to the shortest value. As a result, it is possible to easily perform the factor analysis of the protection operation, and it is possible to reduce the labor of the user performing the factor analysis and investigating the control parameter so that the factor does not occur.

  In the above description, after the protection operation is executed, the monitor data related to the protection operation factor is automatically set to be acquired at the sampling time set to the shortest value. However, it is also effective to provide a function for changing and setting as follows. That is, for the sampling time for each acquisition target monitor that has been set, the default value shown in FIG. 3, that is, the sampling required for all acquisition target monitors, after the protection operation is executed, regardless of the setting state. It is a function that automatically changes and sets the time. Thereby, even when the sampling time is arbitrarily set by the user, it is possible to secure data necessary for analyzing the cause by the data trace after the protection operation.

(Fifth embodiment)
In this embodiment, in the configuration described above, a monitor related to various applications installed in the inverter device 1 can be automatically set as a control parameter at the same time when the application is set. is there.

  This is, for example, as shown in FIG. When an electric motor is targeted as a load, operation control by the inverter device 1 may be performed by applying an application provided in advance. Applications include those that implement a function that operates at “light load high speed”, those that implement a function that controls “brake sequence”, and those that implement a function that controls “torque limit”.

  As specific automatic setting of the related acquisition target monitor, “output frequency”, “command frequency”, “torque” are targeted in “light load high speed” application, and “driving frequency”, “braking sequence”, “Command frequency” is the target, and “torque limit” is an example of “torque”.

  As a result, when the user applies an application, the relevant acquisition target monitor can be set automatically, so that data trace can be set easily and reliably, and factor analysis is easy even during protection operation. Can be implemented.

(Sixth embodiment)
Next, referring to FIG. 13, in each of the above-described embodiments, when a related control parameter that is automatically set when a protection operation occurs is set, when there is a vacant control parameter or there is no control parameter An example in which different settings can be made for each of the above.

  In this embodiment, when there is a vacancy (unset) in the set values of the control parameters xx1 to xxX, when a trip operation or an alarm operation occurs as a protection operation, the control parameters with vacancy are shown in FIG. It is possible to set a monitor related to the trip operation and alarm. Further, when there is no vacancy in the setting values of the control parameters xx1 to xxX, it is possible to set a monitor related to the trip operation or the alarm operation in order from the lowest setting value of the control parameter. . In this case, if there is no vacancy in the set values of the control parameters xx1 to xxX, it is possible to change the monitor settings from the predetermined table in ascending order of priority. In addition, about the setting method of the change of these control parameters, it can also decide for every inverter apparatus beforehand, and it can also be comprised so that it can set which setting method is employ | adopted by the user.

  The control device 3 executes the flowchart of the program shown in FIG. 13 at a predetermined cycle. When starting the program, the control device 3 determines whether a trip operation or an alarm operation has occurred as a protection operation (S41), and ends the program if no protection operation has occurred.

  Further, when an alarm action has occurred (YES in S41), the control device 3 displays the cause of the alarm action on the display unit 6 (S42). Thereafter, the control device 3 determines whether or not there is a monitor setting at the time of the protection operation (S43), and when the setting by the user has already been made and monitoring is possible (YES in S43). Exit the program. When the monitor setting by the user has not been made (NO in S43), the control device 3 determines whether there is a space that can be set in the control parameters xx1 to xxX (S44).

  When there is a vacant space that can be set in the control parameters xx1 to xxX (YES in S44), the control device 3 performs setting so as to acquire monitor data related to a trip or an alarm where possible (S45). . On the other hand, when there is no empty control parameter xx1 to xxX (NO in S44), the control device 3 has already set the monitor data related to the trip or the alarm according to the priority table shown in FIG. The control parameters are changed and set in descending order of priority (S46).

  As a result, when there is a vacant control parameter when setting the acquisition target monitor related to the protection operation, it can be set without affecting the monitor to be acquired that has been set in advance by the user. . In addition, if there is no free space, the minimum setting change can be performed.

  As a specific example of the above, for example, there are six control parameters xx1 to xx6 shown in FIG. 3, and “2” (“output current”) and “3” (“frequency command value” are respectively included in xx1 to xx4. )), “4” (“input voltage”), “5” (“output voltage”) are set, and the remaining xx5 and xx6 are both set to “0” (not set) I will explain it.

  In this setting state, when a trip operation or alarm operation of “overload protection” occurs as the protection operation, the control device 3 changes control parameters related to overload protection set after the protection operation shown in FIG. Set. In this case, among the control parameters related to overload protection, “2” corresponding to “output current” has already been set in the control parameter xx1, so the control device 3 does not set the remaining free control parameters that have not been set. “10” (“inverter overload rate”) and “11” (“inverter status”) are set in xx5 and xx6, respectively.

  On the other hand, for example, when the control parameters can be set for four parameters xx1 to xx4, “2” (“output current”), “3” (“frequency command value”), “ When “4” (“input voltage”) and “5” (“output voltage”) are set, the setting operation is performed as follows.

  In this setting state, when a trip operation or alarm operation of “overload protection” occurs as the protection operation, the control device 3 similarly performs control related to overload protection set after the protection operation shown in FIG. Change and set parameters. In this case, among the control parameters related to overload protection, since “2” corresponding to “output current” has already been set in the control parameter xx1, the control device 3 uses the lower two control parameters (xx3). , Xx4) are rewritten and set from the set monitor settings to “10” (“inverter overload rate”) and “11” (“inverter status”), respectively.

  Further, when the data trace monitor is set for all the control parameters as described above, the setting can be changed as follows. That is, when overload protection or an alarm occurs, “2” that has already been set is a control parameter that is set after the protection operation, and is left as it is. For the remaining settings “1” (“output frequency”), “3” (“frequency command value”), and 4 (“input voltage”), two are “10” (“inverter overload ratio”). ), “11” (“inverter status”).

At this time, which control parameter is to be replaced is carried out according to the priority table shown in FIG. The control device 3 leaves “1” (“output frequency”) with the highest priority from the priority table of the related monitor for overload protection shown in FIG. Are replaced with “10” and “11”.
Thereby, it is possible to set the related control parameters after the protection operation while leaving the control parameter conditions set by the user as effective as possible.

(Eighth embodiment)
Next, with reference to FIG. 14, in each of the above-described embodiments, an example relating to storage of trace data when an alarm operation occurs as a protection operation and then the alarm operation is canceled before reaching the trip operation will be described.

  As described above, for example, when an “overload alarm” operation occurs as a protective operation in the inverter device 1, the control parameter is set so as to acquire related monitor data for the overload alarm. However, after this, the state of the overload alarm operation may be canceled before reaching the overload protection operation. In this case, since the normal operation state has been restored, the related monitor data acquired thereafter is stored in the data trace use area of the RAM 3a, and the old data may be lost over time.

  In this embodiment, assuming such a case, if the alarm operation is canceled before the trip operation after the alarm operation once occurs, the RAM 3a storing the monitor data up to that time is stored. Do not update the data stored in the trace data usage area. As a result, even if a trip operation does not occur as a protection operation, data stored in the trace data use area of the RAM 3a is not updated, thereby reducing the trouble of analyzing the cause of the generated alarm. Is made possible.

  Specifically, the control device 3 executes the program flowchart shown in FIG. 14 at a predetermined cycle. When starting the program, the control device 3 determines whether or not an alarm operation has occurred (S31) as shown in the fourth embodiment. If an alarm operation has occurred (YES in S31), In the same manner as described above, the control parameter rewriting process for the alarm operation is executed (S32 to S35).

  After that, when the trip operation as the protection operation is activated, monitor data for estimating the cause is acquired, but the alarm operation may be canceled without the trip operation. At such timing, the control device 3 executes the program shown in FIG. 14, so that NO is determined in step S31 and an alarm action has occurred until the previous cycle. Process. The control device 3 stops the data update process to the trace data use area of the RAM 3a acquired and stored at the time of the alarm operation (S52), and the monitor data acquired continuously is stored in the RAM 3a. The trace data use area is changed and newly stored (S53).

  As a result, the monitor data acquired during the alarm operation can be left in the trace data use area of the RAM 3a, and can be used to estimate the cause of the alarm operation. .

(Ninth embodiment)
In this embodiment, in the above-described configuration, when a trip operation is performed as a protection operation on the inverter device 1, a monitor related to the protection operation of FIG. 6 is already set in the control parameters xx1 to xxX of FIG. As a process, related control parameters can be displayed.

  For example, when an overload protection trip operation occurs as a protection operation in the inverter device 1, a monitor related to the protection operation of FIG. 6 is set in the control parameter of FIG. 3 as shown in the second embodiment. Thereafter, the set monitor data is acquired and stored in the trace data use area of the RAM 3a. However, if a monitor related to the protective operation has already been set before the protective operation occurs, YES is determined in step S23 shown in the second embodiment, and the cause of the trip operation is displayed on the display unit 6. Control parameters that can avoid tripping can be displayed.

  As a result, even if the protection operation works, even if the same protection operation does not work continuously, if the related monitor is set in advance, the effort to investigate the control parameter is reduced so that the cause does not occur It becomes possible.

(10th Embodiment)
This embodiment is a processing operation when the inverter device 1 is set as “0” (no setting) as a setting value of the control parameters xx1-xxX in FIG. When the setting of setting to is enabled, it is possible to set the monitor related to the protection operation shown in FIG. 5 in the control parameters xx1 to XXX by leaving the state where the monitor is not set. It is.

  As a result, even if the monitor data is not recorded, the control device 3 automatically sets the related monitor in FIG. 6 when a trip operation is performed as a protective operation or an alarm operation occurs. Is done. Thereby, when the same trip operation works continuously, or when the trip operation finally works after the alarm operation, the trouble of factor analysis can be reduced.

(Other embodiments)
The following modifications other than those described in the above embodiment can be made.
In each of the above embodiments, the example of the inverter device 1 that executes the trip operation and the alarm operation as the protective operation has been described. However, the present invention can also be applied to a control device for an inverter device that does not execute the alarm operation as the protective operation.

Each embodiment can adopt a combined embodiment of those that can be combined.
The storage means can adopt various configurations other than the combination of the RAM 3 a and the nonvolatile memory 5. Any device can be used as long as it can acquire and store data during operation of the inverter device 1 and can store data when a trip operation occurs. For example, as long as the rewriting operation of the nonvolatile memory is fast, a configuration in which no RAM is used can be employed. It can also be recorded on a medium such as a hard disk device, CDROM, or DVD.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and equivalents thereof.

  In the drawings, 1 is an inverter device, 2 is an inverter circuit section, 3 is a control device (control means), 3a is a RAM (storage means), 4 is a nonvolatile memory, 5 is an input section (parameter setting means), and 6 is a display. Part (display means).

Claims (13)

In the control device of the inverter device that drives and controls the inverter device with the control content set by the control parameter,
Display means capable of displaying the control parameters set for the previous listening inverter device,
Parameter setting means for setting the control parameter or changing the set control parameter;
Storage means for storing the state of the control parameter;
Control means for storing monitor data obtained by monitoring the operating state of the inverter device or load in the storage means;
The control means includes
When a protective operation is executed in the operation control of the inverter device and the operation is stopped, the factor of the protective operation is displayed on the display unit and stored in the storage unit,
Set the monitor data related to the protection operation as a setting value corresponding to the monitor to be acquired in the control parameter to determine the data trace function acquisition target of the control parameters,
When the same protection operation is executed again after the protection operation is executed, a control parameter that needs to be adjusted in order to avoid the protection operation being executed during the subsequent operation is displayed on the display means. A control device for an inverter device. In the control apparatus of the inverter apparatus according to claim 1 ,
Before executing the protection operation, provided with warning means for generating a warning signal indicating that the protection operation works on the inverter device if the current situation continues,
When the warning means generates the warning signal, the control means corresponds to the monitor to be acquired as a control parameter for determining the data trace function acquisition target for the monitor data related to the generation factor of the protection operation. A control device for an inverter device, wherein the control device is set as a set value. In the control apparatus of the inverter apparatus according to claim 2 ,
The control means is a control parameter that needs to be adjusted in order to avoid performing the protection operation during the subsequent operation when the protection operation is executed after the warning signal is output by the warning means. Is displayed on the display means. In the control apparatus of the inverter apparatus as described in any one of Claim 1 to 3 ,
The parameter setting means is provided so as to be able to set the control parameter for obtaining arbitrary data,
The control means corresponds to the set control parameter when the control parameter for acquiring arbitrary data other than the acquisition target data predetermined in the parameter setting means is set. A control device for an inverter device, characterized by acquiring data. In the control apparatus of the inverter apparatus as described in any one of Claim 1 to 4 ,
The control means is configured to be able to change and set a sampling link time of the monitor data set at that time when the protection operation is executed or when the protection operation is reached. A control device for an inverter device. In the control apparatus of the inverter apparatus as described in any one of Claim 1 to 5,
Before the control parameter for obtaining a liver Nitadeta is previously stored for each control program for driving and controlling the load,
The control device for an inverter device, wherein the parameter setting means changes the setting of the control parameter for acquiring the monitor data for each control program for the load. In the control apparatus of the inverter apparatus as described in any one of Claim 1 to 6,
Said parameter setting means, configurable number only provided to be set as the control parameter, if already number of control parameters is set smaller than the settable number count, the protection operation or when the protection operation A control device for an inverter device, characterized in that the control parameter is set by adding a new control parameter that is set before reaching the point. In the control apparatus of the inverter apparatus as described in any one of Claim 1 to 6 ,
The parameter setting means is configured to set the control parameter set at the time of the protection operation or before reaching the protection operation by rewriting the control parameter that has already been set. Inverter control device. In the control apparatus of the inverter apparatus according to claim 8 ,
The parameter setting means performs a rewrite setting for a control parameter that is set at the time of the protection operation or before reaching the protection operation, among the control parameters that have already been set with a low priority. It is comprised as follows. The control apparatus of the inverter apparatus characterized by the above-mentioned. In the control apparatus of the inverter apparatus as described in any one of Claim 1 to 9 ,
The control means stops the storage update processing of the monitor data for the storage area that has been stored and updated when the state that has been reached after the occurrence of the protection operation is canceled after the state has been released Control device for the device. In the control apparatus of the inverter apparatus according to claim 10 ,
The control means performs a storage update process for a storage area different from the storage area of the monitor data that has been stored and updated when the state that has reached the protection operation occurs and the state is canceled. A control device for an inverter device. In the control apparatus of the inverter apparatus as described in any one of Claim 1 to 11 ,
In order to avoid the same protection operation from being executed during the subsequent operation when the protection operation is executed and the monitor data of the factor related to the protection operation has already been acquired. A control device for an inverter device, wherein the control parameter for which change setting is recommended is displayed on the display means. In the control apparatus of the inverter apparatus as described in any one of Claim 1 to 12 ,
The control means validates the setting that determines the data trace function acquisition target in the control parameters when the protection operation is executed or when the protection operation is reached. A control device for an inverter device, wherein the monitor data related to the protection operation is set as a set value corresponding to a monitor to be acquired in the control parameter.

Images