A press station machine control circuit and method

Abstract

The application relates to the technical field of pressurizing station unit control, and discloses a pressurizing station unit control circuit and method, which comprises a chip KZ-400, a constant-speed unit M06, a variable-frequency unit M07, a constant-speed unit M08 and a variable-frequency unit M09; and the M13 terminal of the KZ-400 is electrically connected with the constant-speed unit M06, the variable-frequency unit M07, the constant-speed unit M08 and the variable-frequency unit M09 respectively. The application solves the problems that the existing technology cannot realize the combined operation of multiple variable-frequency units and power-frequency units.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pressurizing station unit control, in particular to a pressurizing station unit control circuit and method. BACKGROUND

[0002] At present, although the basic functions of integrated constant pressure controllers on the market are more and more perfect, whether it is a two-loop or a five-loop controller, most of them have only one 0-10V frequency output terminal, which cannot realize the rotation of the frequency converter and cannot meet the control requirements of two or more frequency converter units. Taking KZ-400 integrated controller as an example for analysis.

[0003] In practical application, it is found that the M07 and M09 units of a certain pressurizing station are respectively controlled by independent frequency converters, as shown in the figure, according to the connection method in the KZ-400 general use control circuit, the controller has only one pair of frequency output terminals, which cannot switch control of two frequency converters, and the M07 and M09 frequency converter units can only have one connected to automatic control, resulting in that one of the frequency converter units cannot be used, causing great waste of equipment resources, which is unreasonable. Figure 2 SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the present application provides a pressurizing station unit control circuit and method, which solves the problem that the prior art cannot realize the joint operation of multiple frequency converter units and power frequency units.

[0005] The technical scheme adopted by the present application to solve the above problems is:

[0006] A pressurizing station unit control circuit, comprising a chip KZ-400, a constant speed unit M06, a frequency conversion unit M07, a constant speed unit M08, and a frequency conversion unit M09, wherein the M13 terminal of the KZ-400 is electrically connected with the constant speed unit M06, the frequency conversion unit M07, the constant speed unit M08, and the frequency conversion unit M09, respectively.

[0007] ​As a preferred technical scheme, the Y4 terminal of the KZ-400 is electrically connected with the live wire, the Y5 terminal of the KZ-400, the contact of the KA9, the coil of the KA8 and the zero line are sequentially electrically connected, the Y6 terminal of the KZ-400 and the Y8 terminal of the KZ-400 are electrically connected, the Y7 terminal of the KZ-400, the contact of the KA8, the coil of the KA9 and the zero line are sequentially electrically connected, the Y8 terminal of the KZ-400, the coil of the KA10 and the zero line are sequentially electrically connected, the Y13 terminal of the KZ-400, the coil of the KA11 and the zero line are sequentially electrically connected, the M13 terminal of the KZ-400, the contact of the KA8, the variable frequency unit M07 and the M12 terminal of the KZ-400 are sequentially electrically connected, the M13 terminal of the KZ-400, the contact of the KA9, the variable frequency unit M09 and the M12 terminal of the KZ-400 are sequentially electrically connected.

[0008] As a preferred technical scheme, the variable frequency unit M07 comprises a frequency converter ACS510, an intermediate relay KA1, an intermediate relay KA2, a change-over switch SA1, a start button SBS1 and a stop button SBT1, the live wire, the SA1, the SBS1, the SBT1, the contact of the KA2, the coil of the KA1 and the zero line are sequentially electrically connected, the SBS1 and the contact of the KA1 are connected in parallel, the SA1, the contact of the KA8 and the node between the SBT1 and the contact of the KA2 are sequentially electrically connected, the +24V terminal of the ACS510, the contact of the KA1 and the DI1 terminal of the ACS510 are electrically connected, the DCOM terminal of the ACS510 and the GND terminal of the ACS510 are electrically connected, the R03B terminal of the ACS510 is electrically connected with the live wire, the R03C terminal of the ACS510, the coil of the KA2 and the zero line are sequentially electrically connected, the AI1 terminal of the ACS510 and the contact of the KA8 are electrically connected, the AGND terminal of the ACS510 and the M12 terminal of the KZ-400 are electrically connected.

[0009] As a preferred technical scheme, the power frequency unit M08 includes a soft starter PSS, an intermediate relay KA3, an intermediate relay KA4, an intermediate relay KA5, a change-over switch SA2, a start button SBS2, a stop button SBT2, a coil KM, a live wire, the contacts of SA2, SBS2, SBT2 and K5, the coil of KA3, a zero wire are sequentially electrically connected, the contacts of SBS2 and KA3 are in parallel, the nodes between the contacts of SA2, KA10, SBT2 and KA5 are sequentially electrically connected, the live wire, the contacts of KA4, KM and the zero wire are sequentially electrically connected, the +24V terminal of PSS, the contacts of KA3 and the DI1 terminal of PSS are electrically connected, the DI1 terminal of PSS and the DCOM of PSS are electrically connected, the BYPASS terminal of PSS and the live wire are electrically connected, the FA1 terminal of PSS and the live wire are electrically connected, the BYPASS terminal of PSS, the coil of KA4 and the zero wire are sequentially electrically connected, the FA2 terminal of PSS, the coil of KA5 and the zero wire are sequentially electrically connected.

[0010] As a preferred technical scheme, the variable frequency unit M09 includes a variable frequency converter ACS510, an intermediate relay KA6, an intermediate relay KA7, a change-over switch SA3, a start button SBS3, a stop button SBT3, a live wire, the contacts of SA3, SBS3, SBT3 and KA7, the coil of KA6 and a zero wire are sequentially electrically connected, the contacts of SBS3 and KA6 are in parallel, the nodes between the contacts of SA3, KA9, SBT3 and KA7 are sequentially electrically connected, the +24V terminal of ACS510, the contacts of KA6 and the DI1 terminal of ACS510 are electrically connected, the DCOM terminal of ACS510 and the GND terminal of ACS510 are electrically connected, the R03B terminal of ACS510 and the live wire are electrically connected, the R03C terminal of ACS510, the coil of KA7 and the zero wire are sequentially electrically connected, the AI1 terminal of ACS510 and the contacts of KA9 are electrically connected, the AGND terminal of ACS510 and the M12 terminal of KZ-400 are electrically connected.

[0011] As a preferred technical scheme, the variable frequency unit M06 includes a change-over switch SA4, a thermal relay FR, an AC contactor KM4, a live wire, SA4, FR, the coil of KM4 and a zero wire are sequentially electrically connected, the nodes between SA4, the coil of KA11 and SA4 and FR are sequentially electrically connected.

[0012] A kind of pressurizing station unit control method, using the pressurizing station unit control circuit of described, by SA1 control selection manual, automatic mode: 1) manual mode time: if press SBS1, KA1 coil is connected, KA1 contact is closed, M07 frequency converter obtains start signal, realizes start self-keeping;If press SBT1, KA1 coil is lost, KA1 contact is disconnected, M07 frequency converter stops;2) automatic mode time: if KA8 contact is closed, control KA1 coil is connected, KA1 contact is closed, M07 frequency converter obtains start signal, simultaneously, KA8 contact is closed, the voltage of M13 terminal of KZ-400 is exported to M07 frequency converter and carries out frequency given, at this time, M07 frequency converter obtains frequency modulation signal, realizes M07 unit automatic operation;If KA8 contact is disconnected, KA1 coil is lost, KA1 contact is disconnected, M07 frequency converter stops.

[0013] A kind of pressurizing station unit control method, using the pressurizing station unit control circuit of described, by SA2 control selection manual, automatic mode: 1) manual mode time: if press SBS2, KA3 coil is connected, KA3 contact is closed, M08 soft starter enters start program, after completion KA4 coil is connected, KA4 contact is closed, KM coil is connected, realizes M08 power frequency unit operation;If press SBT2, KA3 coil is lost, KA2 contact is disconnected, M08 soft starter stops, KA4 coil is lost, KA4 contact is disconnected, KM coil is lost, M08 power frequency unit stops;2) automatic mode time: if KA10 contact is closed, control KA3 coil is connected, KA3 contact is closed, M08 soft starter enters start program, after completion KA4 coil is connected, KA4 contact is closed, KM coil is connected, realizes M08 power frequency unit automatic operation;If KA10 contact is disconnected, KA3 coil is lost, KA3 contact is disconnected, M08 soft starter stops, KA4 coil is lost, KA4 contact is disconnected, KM coil is lost, M08 power frequency unit stops.

[0014] A kind of pressurizing station unit control method, using the pressurizing station unit control circuit of described, by SA3 control selection manual, automatic mode: 1) manual mode time: if press SBS3, KA6 coil is connected, KA6 contact is closed, M09 frequency converter obtains start signal, realizes start self-keeping;If press SBT3, KA6 coil is lost, KA6 contact is disconnected, M09 frequency converter stops;2) automatic mode time: if KA9 contact is closed, control KA6 coil is connected, KA6 contact is closed, M09 frequency converter obtains start signal, simultaneously, KA9 contact is closed, the voltage of M13 terminal of KZ-400 is exported to M09 frequency converter frequency given, at this time, M09 frequency converter obtains frequency modulation signal, realizes M09 unit automatic operation;If KA9 contact is disconnected, KA6 coil is lost, KA6 contact is disconnected, M09 frequency converter stops.

[0015] A kind of pressurized station unit control method, using the pressurized station unit control circuit of described selection manual, automatic mode by SA4 control: 1) manual mode time: if KM4 coil is connected, realize M06 unit start-up;If KM4 coil is lost, M06 unit stops;2) automatic mode time: if KA11 contact is closed, KM4 coil is connected, realize M06 unit start-up;If KA11 contact is disconnected, KM4 coil is lost, M06 unit stops.

[0016] Compared with prior art, the present application has the following beneficial effects:

[0017] (1) The present application realizes the joint operation of multiple sets of frequency conversion unit and power frequency unit by expanding the control circuit of use method, expands the application range of integrated constant voltage controller, and provides a solution for such controller for more complex system of multiple units;

[0018] (2) The present application effectively makes up for the limitation that integrated constant voltage controller cannot alternate and switch control frequency converter, can stably and reliably realize the switching operation of multiple sets of frequency conversion unit and the joint operation of power frequency unit, changes the current manual switching and operation of frequency conversion unit, ensures the full-automatic operation of water supply unit, and realizes unmanned. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is KZ-400 terminal diagram;

[0020] Figure 2 It is the schematic diagram of prior art KZ-400 general use control circuit;

[0021] Figure 3 It is KZ-400 expansion use control circuit;

[0022] Figure 4 It is M07 unit control principle diagram;

[0023] Figure 5 It is M08 unit control principle diagram;

[0024] Figure 6 It is M09 unit control principle diagram;

[0025] Figure 7 It is M06 unit control principle diagram. DETAILED DESCRIPTION

[0026] The present application will be further described in detail below in combination with embodiments and drawings, but the embodiments of the present application are not limited thereto.

[0027] Example 1

[0028] As Figures 1 to 7As shown, to meet the needs of some pressurized station low pressure area water supply start-up, to promote the construction of unmanned, to realize the low area unit automation operation.

[0029] Basic configuration: a total of 4 units, respectively, 11kW constant speed unit M06, 75kW variable frequency unit M07, 75kW constant speed unit M08, 75kW variable frequency unit M09, the outlet valve is a silent check valve.

[0030] From the KZ-400 terminal diagram and wiring diagram, only one 0-10V frequency output terminal in the system controls a frequency converter, and through the switching contactor during operation, the "variable frequency + power frequency" operation mode is realized. Through frequency judgment and timing logic, the timing switching unit is realized. When the frequency reaches the upper limit and the feedback pressure does not reach the set value, after a delay, the variable frequency unit is switched to power frequency operation, the frequency converter starts the next unit, realizing the increase of the unit; similarly, when the frequency drops to the lower limit and the feedback pressure is still higher than the set value, after a delay, the power frequency unit is turned off, and the frequency converter automatically adjusts to maintain pressure operation.

[0031] M07 unit control principle:

[0032] The manual and automatic modes are selected by the changeover switch (SA1).

[0033] Manual mode: press the start button (SBS1), the middle relay (KA1) coil is connected, the auxiliary contact (KA1) is closed, the M07 frequency converter gets the start signal, realizes the start self-holding, and the manual frequency adjustment is performed through the frequency converter operation panel; press the stop button (SBT1), the middle relay (KA1) coil loses power, the auxiliary contact (KA1) is opened, and the M07 frequency converter is stopped.

[0034] Automatic mode: controlled by the auxiliary contact of the middle relay (KA8) introduced into the KZ-400 expansion control circuit, the auxiliary contact (KA8) is closed, the middle relay (KA1) coil is connected, the auxiliary contact (KA1) is closed, the M07 frequency converter gets the start signal, at the same time, the auxiliary contact (KA8) is closed, the 0-10V frequency output of KZ-400 is output to the frequency given of M07 frequency converter, at this time, the M07 frequency converter gets the frequency modulation signal, realizes the automatic operation of M07 unit. The middle relay (KA8) is disconnected, the auxiliary contact (KA8) is disconnected, the middle relay (KA1) coil loses power, the auxiliary contact (KA1) is disconnected, and the M07 frequency converter is stopped.

[0035] M08 unit control principle:

[0036] The manual and automatic modes are selected by the changeover switch (SA2).

[0037] Manual mode: press the start button (SBS2), the middle relay (KA3) coil is connected, the auxiliary contact (KA3) is closed, M08 soft starter enters the start program, after completion, KA4 coil is connected, KA4 contact is closed, KM coil is connected, M08 frequency unit operation is realized; if press SBT2, KA3 coil is lost, KA2 contact is disconnected, M08 soft starter stops, KA4 coil is lost, KA4 contact is disconnected, KM coil is lost, M08 frequency unit stops;

[0038] Automatic mode: by leading to KZ-400 expansion method control circuit middle relay (KA10) auxiliary contact control, auxiliary contact (KA10) is closed, control middle relay (KA3) coil is connected, auxiliary contact (KA3) is closed, M08 soft starter enters the start program, after completion, KA4 coil is connected, KA4 contact is closed, KM coil is connected, M08 frequency unit automatic operation is realized; if KA10 contact is disconnected, KA3 coil is lost, KA3 contact is disconnected, M08 soft starter stops, KA4 coil is lost, KA4 contact is disconnected, KM coil is lost, M08 frequency unit stops.

[0039] M09 unit control principle:

[0040] Manual, automatic mode is selected by switch (SA3).

[0041] Manual mode: press the start button (SBS3), the middle relay (KA6) coil is connected, the auxiliary contact (KA6) is closed, M09 frequency converter gets start signal, realizes start self-holding, manual frequency adjustment is carried out through frequency converter operation panel; press the stop button (SBT3), the middle relay (KA6) coil is lost, the auxiliary contact (KA6) is disconnected, M09 frequency converter stops.

[0042] Automatic mode: by leading to KZ-400 expansion method control circuit middle relay (KA9) auxiliary contact control, auxiliary contact (KA9) is closed, control middle relay (KA6) coil is connected, auxiliary contact (KA6) is closed, M09 frequency converter gets start signal, at the same time, auxiliary contact (KA9) is closed, KZ-400 0-10V frequency end output to M09 frequency converter frequency given, at this time, M09 frequency converter gets frequency modulation signal, realizes M09 unit automatic operation. Middle relay (KA9) is disconnected, auxiliary contact (KA9) is disconnected, middle relay (KA6) coil is lost, auxiliary contact (KA6) is disconnected, M09 frequency converter stops.

[0043] M06 unit control principle:

[0044] Manual, automatic mode is selected by switch (SA4).

[0045] Manual mode: switch the switch (SA4) to manual position, the coil of the AC contactor (KM4) is connected, and the M06 unit is started; switch the switch (SA4) to stop position, the coil of the AC contactor (KM4) is disconnected, and the M06 unit is stopped.

[0046] Automatic mode: switch the switch (SA4) to automatic position, the auxiliary contact of the relay (KA11) is controlled by the KZ-400 expansion control circuit, the auxiliary contact (KA11) is closed, the coil of the AC contactor (KM4) is connected, and the M06 unit is started; the auxiliary contact (KA11) is opened, the coil of the AC contactor (KM4) is disconnected, and the M06 unit is stopped.

[0047] Expansion control circuit:

[0048] The coils of the intermediate relays (KA8, KA9, KA10, KA11) are controlled by the KZ-400 output, and their auxiliary contacts are connected to the automatic signal of the M07, M08, M09, M06 unit control circuit. When the system is running automatically, switch the switches (SA1, SA2, SA3, SA4) to the automatic position, the 1# frequency port of the KZ-400 outputs, the coil of the intermediate relay (KA8) is connected, the auxiliary contact (KA8) is closed, the coil of the intermediate relay (KA1) is connected, the auxiliary contact (KA1) is closed, and the M07 frequency converter receives the start signal. At the same time, the auxiliary contact (KA8) is closed, the 0-10V frequency port of the KZ-400 outputs to the frequency setting of the M07 frequency converter, the M07 frequency converter receives the frequency modulation signal, and the M07 unit runs automatically.

[0049] When the KZ-400 determines that the system needs to add a unit, the 1# frequency port of the KZ-400 is disconnected, the intermediate relay (KA8) is disconnected, the auxiliary contact (KA8) is disconnected, the coil of the intermediate relay (KA1) is disconnected, the auxiliary contact (KA1) is disconnected, and the M07 frequency converter is stopped. Then, the 1# power port of the KZ-400 outputs, the coil of the intermediate relay (KA10) is connected, the auxiliary contact (KA10) is closed, the coil of the intermediate relay (KA3) is connected, the auxiliary contact (KA3) is closed, the M08 soft starter receives the start signal, and the M08 unit runs automatically. At the same time, the 2# frequency port of the KZ-400 outputs, the coil of the intermediate relay (KA9) is connected, the auxiliary contact (KA9) is closed, the coil of the intermediate relay (KA6) is connected, the auxiliary contact (KA6) is closed, the M09 frequency converter receives the start signal, the auxiliary contact (KA9) is closed, the 0-10V frequency port of the KZ-400 outputs to the frequency setting of the M09 frequency converter, the M09 frequency converter receives the frequency modulation signal, and the M09 unit runs automatically. At this time, the system realizes the M08 unit running at power frequency and the M09 unit running at variable frequency.

[0050] When the KZ-400 judging system needs to sleep, the power frequency and frequency conversion port of the KZ-400 stops outputting, the M07, M08 and M09 units stop, the auxiliary pump port outputs, the intermediate relay (KA11) coil is connected, the auxiliary contact (KA11) is closed, the AC contactor (KM4) coil is connected, the main contact (KM4) is closed, and the M06 unit is operated.

[0051] The KZ-400 controller frequency conversion starting signal is changed to control two interlocked intermediate relays, and the switching of the frequency output loop of the controller is realized. When the M07 unit is operated, the 0-10V frequency given signal is only transmitted to the frequency given terminal of the M07 frequency converter, and the M09 frequency converter has no signal input. When the system timing switches the unit, the M09 unit obtains the starting signal, the frequency given is switched, and the purpose of operating the two frequency converters is achieved.

[0052] The power frequency loop is connected to the M08 unit (soft start) starting signal, the two frequency converters and one power frequency are used in the system, and the M06 unit is connected to the auxiliary pump loop for control, and the pressure maintaining operation during the low peak period when the frequency converter sleeps is realized.

[0053] The integrated constant voltage controller integrates a touch screen, digital I / O, analog I / O, control logic, built-in packaging program and PID control algorithm, and has a high degree of completion of the operation interface.

[0054] Compared with the programmable controller PLC, the device cost is low (the PLC hardware and software cost is about 8-10 times of the controller), the technical difficulty is low, the maintenance is simple, the debugging time is short, and personnel only need electrical basic knowledge to realize operation.

[0055] In summary, the two frequency converters and the two power frequencies are connected to the system for use in the application, the limitation that the KZ-400 controller cannot alternately control the two frequency converter units is effectively compensated, and the use efficiency of the equipment is fully utilized.

[0056] As described above, the application can be better realized.

[0057] All the features disclosed by all the examples in the specification, or all the steps of the methods or processes disclosed by the specification, can be combined and / or extended in any manner, and / or replaced by other technical features disclosed in the specification, except for mutually exclusive features and / or steps, in any possible way.

[0058] The above is only a preferred embodiment of the application, and does not limit the application in any form. According to the technical essence of the application, any simple modification, equivalent replacement and improvement of the above embodiment within the spirit and principle of the application are still within the protection scope of the technical scheme of the application.

Claims

1. A press station machine group control circuit, characterized by, The processor KZ-400, the constant speed unit M06, the frequency conversion unit M07, the constant speed unit M08, the frequency conversion unit M09 are included, and the M13 terminal of the KZ-400 is electrically connected with the constant speed unit M06, the frequency conversion unit M07, the constant speed unit M08 and the frequency conversion unit M09 respectively; The intermediate relay KA8, the intermediate relay KA9, the intermediate relay KA10 and the intermediate relay KA11 are further included, the Y4 terminal of the KZ-400 is electrically connected with the live wire, the Y5 terminal of the KZ-400, the contact of the KA9, the coil of the KA8 and the zero line are electrically connected in sequence, the Y6 terminal of the KZ-400 and the Y8 terminal of the KZ-400 are electrically connected, the Y7 terminal of the KZ-400, the contact of the KA8, the coil of the KA9 and the zero line are electrically connected in sequence, the Y8 terminal of the KZ-400, the coil of the KA10 and the zero line are electrically connected in sequence, the Y13 terminal of the KZ-400, the coil of the KA11 and the zero line are electrically connected in sequence, the M13 terminal of the KZ-400, the contact of the KA8, the frequency conversion unit M07, the M12 terminal of the KZ-400 are electrically connected in sequence, the M13 terminal of the KZ-400, the contact of the KA9, the frequency conversion unit M09, the M12 terminal of the KZ-400 are electrically connected in sequence.

2. A press station group control circuit according to claim 1, wherein, The frequency conversion unit M07 includes the frequency converter ACS510, the intermediate relay KA1, the intermediate relay KA2, the change-over switch SA1, the start button SBS1, the stop button SBT1, the live wire, the SA1, the SBS1, the SBT1, the contact of the KA2, the coil of the KA1 and the zero line are electrically connected in sequence, the SBS1 and the contact of the KA1 are connected in parallel, the node between the SA1, the contact of the KA8 and the SBT1 and the contact of the KA2 are electrically connected in sequence, the +24V terminal of the ACS510, the contact of the KA1 and the DI1 terminal of the ACS510 are electrically connected, the DCOM terminal of the ACS510 and the GND terminal of the ACS510 are electrically connected, the R03B terminal of the ACS510 is electrically connected with the live wire, the R03C terminal of the ACS510, the coil of the KA2 and the zero line are electrically connected in sequence, the AI1 terminal of the ACS510 and the contact of the KA8 are electrically connected, the AGND terminal of the ACS510 and the M12 terminal of the KZ-400 are electrically connected.

3. A press station group control circuit according to claim 1, wherein, The constant speed unit M08 includes a soft starter PSS, an intermediate relay KA3, an intermediate relay KA4, an intermediate relay KA5, a change-over switch SA2, a start button SBS2, a stop button SBT2, a coil KM, a live wire, contacts of SA2, SBS2, SBT2, KA5, a coil of KA3, a zero wire are sequentially electrically connected, contacts of SBS2, KA3 are in parallel, a node between contacts of SA2, KA10, SBT2 and contacts of KA5 are sequentially electrically connected, a live wire, contacts of KA4, KM, a zero wire are sequentially electrically connected, a +24V terminal of PSS, contacts of KA3, a DI1 terminal of PSS are electrically connected, a DI1 terminal of PSS, a DCOM of PSS are electrically connected, a BYPASS terminal of PSS and a live wire are electrically connected, a FA1 terminal of PSS and a live wire are electrically connected, a BYPASS terminal of PSS, a coil of KA4, a zero wire are sequentially electrically connected, a FA2 terminal of PSS, a coil of KA5, a zero wire are sequentially electrically connected.

4. A press station group control circuit according to claim 1, wherein, The variable frequency unit M09 includes a frequency converter ACS510, an intermediate relay KA6, an intermediate relay KA7, a change-over switch SA3, a start button SBS3, a stop button SBT3, a live wire, contacts of SA3, SBS3, SBT3, KA7, a coil of KA6, a zero wire are sequentially electrically connected, contacts of SBS3, KA6 are in parallel, a node between contacts of SA3, KA9, SBT3 and contacts of KA7 are sequentially electrically connected, a +24V terminal of ACS510, contacts of KA6, a DI1 terminal of ACS510 are electrically connected, a DCOM terminal of ACS510, a GND terminal of ACS510 are electrically connected, a R03B terminal of ACS510 and a live wire are electrically connected, a R03C terminal of ACS510, a coil of KA7, a zero wire are sequentially electrically connected, a AI1 terminal of ACS510, contacts of KA9 are electrically connected, a AGND terminal of ACS510, a M12 terminal of KZ-400 are electrically connected.

5. A press station group control circuit according to claim 1, wherein, The constant speed unit M06 includes a change-over switch SA4, a thermal relay FR, an AC contactor KM4, a live wire, a coil of SA4, FR, KM4, a zero wire are sequentially electrically connected, a node between SA4, a coil of KA11, SA4 and FR are sequentially electrically connected.

6. A press station machine group control method characterized by, The control circuit of the pressurizing station unit is controlled by SA1 to select manual or automatic mode: 1) in manual mode, if SBS1 is pressed, KA1 coil is connected, KA1 contact is closed, M07 frequency converter gets start signal to realize self-holding start; if SBT1 is pressed, KA1 coil loses power, KA1 contact is opened, and M07 frequency converter stops; 2) in automatic mode, if KA8 contact is closed, KA1 coil is connected, KA1 contact is closed, M07 frequency converter gets start signal, at the same time, KA8 contact is closed, M13 terminal output voltage of KZ-400 is output to M07 frequency converter to give frequency, at this time, M07 frequency converter gets frequency modulation signal to realize automatic operation of M07 unit; if KA8 contact is opened, KA1 coil loses power, KA1 contact is opened, and M07 frequency converter stops.

7. A press station machine group control method characterized by, The control circuit of the pressurizing station unit is controlled by SA2 to select manual or automatic mode: 1) in manual mode, if SBS2 is pressed, KA3 coil is connected, KA3 contact is closed, M08 soft starter enters start program, after completion, KA4 coil is connected, KA4 contact is closed, and KM coil is connected to realize operation of M08 power frequency unit; if SBT2 is pressed, KA3 coil loses power, KA2 contact is opened, M08 soft starter stops, KA4 coil loses power, KA4 contact is opened, and KM coil loses power to stop M08 power frequency unit; 2) in automatic mode, if KA10 contact is closed, KA3 coil is connected, KA3 contact is closed, M08 soft starter enters start program, after completion, KA4 coil is connected, KA4 contact is closed, and KM coil is connected to realize automatic operation of M08 power frequency unit; if KA10 contact is opened, KA3 coil loses power, KA3 contact is opened, M08 soft starter stops, KA4 coil loses power, KA4 contact is opened, and KM coil loses power to stop M08 power frequency unit.

8. A press station machine group control method characterized by, The control circuit of the pressurizing station unit is controlled by SA3 to select manual or automatic mode: 1) in manual mode, if SBS3 is pressed, KA6 coil is connected, KA6 contact is closed, M09 frequency converter gets start signal to realize self-holding start; if SBT3 is pressed, KA6 coil loses power, KA6 contact is opened, and M09 frequency converter stops; 2) in automatic mode, if KA9 contact is closed, KA6 coil is connected, KA6 contact is closed, M09 frequency converter gets start signal, at the same time, KA9 contact is closed, M13 terminal output voltage of KZ-400 is output to M09 frequency converter to give frequency, at this time, M09 frequency converter gets frequency modulation signal to realize automatic operation of M09 unit; if KA9 contact is opened, KA6 coil loses power, KA6 contact is opened, and M09 frequency converter stops.

9. A press station machine group control method characterized by, The control circuit of the press station unit is controlled by SA4 to select manual or automatic mode: 1) in manual mode, if the KM4 coil is connected, M06 unit is started; if the KM4 coil is disconnected, M06 unit is stopped; 2) in automatic mode, if the KA11 contact is closed and the KM4 coil is connected, M06 unit is started; if the KA11 contact is disconnected and the KM4 coil is disconnected, M06 unit is stopped.

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