MCGS touch screen and G120 frequency converter communication device

Abstract

An MCGS touch screen and G120 frequency converter communication device comprises an MCGS touch screen (1), a G120 frequency converter (2) and an analog quantity speed regulation manual control device (3), and is characterized in that the MCGS touch screen (1) comprises a network port; the MCGS touch screen (1) and the G120 frequency converter (2) are connected to a P1 or P2 network port of the frequency converter control unit through an MGCS network port network cable, and the analog quantity speed regulation manual control device (3) and the G120 frequency converter (2) are connected to the frequency converter control unit through hard wires. The MCGS touch screen and the G120 frequency converter communication device do not perform data transfer through a PLC, but directly communicate with the frequency converter, so that the cost is saved; equipment operation stability is very high, and even if the touch screen (1) breaks down, forward and reverse rotation control and stepless speed regulation of the frequency converter can still be achieved by switching the frequency converter to a manual analog quantity speed regulation mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical automation control technical field relates to MCGS touch -sensitive screen and G120 frequency changer's communication device. BACKGROUND

[0002] Generally, to realize the communication between HMI device and G120 series frequency changer such as CU240E-2 PN, a PLC supporting PROFINET IO communication is needed.If only simple control and monitoring are needed for G120 CU240E-2 PN, the PLC in the above only functions as data relay, in this case, the touch screen directly communicates with G120 CU240E-2 PN, which not only realizes the monitoring function, but also saves a PLC.

[0003] Adopting MCGS touch screen and Siemens G120 CU240E-2 PN frequency changer direct communication control, automatic shutdown can be realized in the case of communication interruption between touch screen and frequency changer, and manual switching of frequency changer to analog speed control mode can be realized in the case of touch screen failure, which not only saves equipment cost, but also improves equipment reliability and does not affect on-site production. UTILITY MODEL CONTENTS

[0004] The utility model discloses to the deficiency of prior art, provide a kind of communication device of MCGS touch screen and G120 frequency changer, especially CU240E-2PN, without passing through PLC and doing data relay, equipment operation stability is high, even if touch screen has failed, still can realize the positive and negative rotation control and stepless speed regulation of frequency changer by the way of switching frequency changer to manual analog speed regulation.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] MCGS touch screen and G120 frequency changer communication device, including MCGS touch screen, G120 frequency changer and analog speed regulation manual control device, MCGS touch screen includes web interface, the touch screen of supporting script programming function, MCGS touch screen and G120 frequency changer are connected to the P1 or P2 web interface of frequency changer control unit through MGCS web interface network cable between them, analog speed regulation manual control device and G120 frequency changer are connected to the control unit terminal of frequency changer through hard wire.

[0007] Further, the analog quantity speed regulation manual control device is composed of a forward rotation starting switch, a reverse rotation starting switch, a mode conversion switch and a rotary potentiometer.

[0008] Further, the G120 frequency converter adopts a Siemens G120 CU240E-2 PN frequency converter.

[0009] Compared with the prior art, the MCGS touch screen and the G120 frequency converter communication device do not pass through a PLC for data conversion, directly communicate with the touch screen and the frequency converter, and the PLC part is removed to save the cost; the equipment running stability is very high, even if the touch screen fails, the frequency converter can still be switched to the manual analog quantity speed regulation mode to realize the forward and reverse rotation control and the stepless speed regulation of the frequency converter. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a system hardware connection structure diagram.

[0011] Figures 2 to 4 It is a touch screen configuration diagram.

[0012] Figure 5 It is a G120 frequency converter parameter setting diagram.

[0013] Figure 6 It is a system running effect diagram.

[0014] Among them, 1-MCGS touch screen; 2-G120 frequency converter; 3-analog quantity speed regulation manual control device. DETAILED DESCRIPTION

[0015] The following will be combined with the embodiment of the accompanying drawings.

[0016] Figures 1 to 6The MCGS touch screen communicates with the G120 CU240E-2 PN device, including the MCGS touch screen 1, the G120 frequency converter 2 of the CU240E-2 PN of Siemens, and the analog quantity speed regulation manual control device 3. The MCGS touch screen 1 includes a touch screen with a network port and a script writing function. The MCGS touch screen 1 and the G120 frequency converter 2 of the CU240E-2 PN are connected to the P1 or P2 network port of the frequency converter control unit through the MGCS network port network cable. The analog quantity speed regulation manual control device 3 and the G120 frequency converter 2 of the CU240E-2 PN are connected to the control unit of the G120 CU240E-2 PN frequency converter through a hard wire. The MCGS touch screen 1 and the G120 frequency converter 2 adopt the Siemens free message mode, control the start, stop and frequency setting of the frequency converter through the non-periodic communication mode, and read the current, voltage and motor temperature, actual speed of the frequency converter in real time. The communication interruption automatic shutdown implementation mode of the G120 frequency converter 2 CU240E-2 PN and the MCGS touch screen 1 is realized by writing a script program in the MCGS touch screen 1 and using the free function block timer function in the G120 frequency converter 2 of the CU240E-2 PN.

[0017] The analog quantity speed regulation manual control device 3 is composed of three switches (one forward rotation start switch, one reverse rotation start switch, and one mode conversion switch) and one potentiometer. The touch screen touch control mode and the manual analog quantity control mode are realized by the mode conversion switch. The potentiometer gives the manual speed setting of the G120 CU240E-2 PN frequency converter 2.

[0018] The following variable is configured in the MCGS touch screen 1, the start value of the G120 frequency converter 2 of the CU240E-2 PN, the address DB2900:DF000 corresponds to the frequency converter P2900[0] parameter, which is used to start / stop the G120 CU240E-2 PN frequency converter 2. When the frequency converter is started, the value 100 is written, and when it is stopped, the value 0 is written.

[0019] The address DB2901:DF000 corresponds to the frequency converter P2900[1] parameter, which reads the state of the communication connection between the frequency converter and the touch screen. The address DB1015:DF000 corresponds to the frequency converter P1015[0] parameter, which reads the given speed value of the frequency converter. The address DB21:DF000 reads the actual speed output by the frequency converter.

[0020] The address DB25:DF000 is used to read the actual output voltage of the frequency converter.

[0021] The address DB27:DF000 monitors the actual output current of the frequency converter.

[0022] DB35: DF000 is used to display the real-time temperature of the motor.

[0023] DB52: 000.2 is the third bit of the frequency converter configuration word, used to indicate the operation of the frequency converter. DB52: 000.3 is the fourth bit of the frequency converter status word, used to display whether the frequency converter has a fault such as Figure 2 .

[0024] A script program is inserted in the touch screen, such as Figure 3 , to prevent the touch screen and the frequency converter from automatically restarting and not stopping after communication interruption or recovery. The script program is as follows:

[0025] count value = count value + 1

[0026] if count value < 28 Then

[0027] frequency converter heartbeat = 100

[0028] else frequency converter heartbeat = 0

[0029] endif

[0030] if count value = 30 Then

[0031] count value = 0

[0032] Endif

[0033] Clicking the start or stop button in MCGS touch screen 1 and modifying the frequency setting value of G120 CU240E-2 PN frequency converter 2 executes Figure 4 a script to control the writing of the start or stop state of G120 CU240E-2 PN frequency converter 2 and convert the frequency setting value into speed. The script program is as follows:

[0034] G120 CU240E-2 PN frequency converter 2 speed setting = speed conversion * 30

[0035] if start = 1 then

[0036] G120 CU240E-2 PN frequency converter 2 start value = 100

[0037] endif

[0038] if stop = 1 then

[0039] G120 CU240E-2 PN frequency converter 2 start value = 0

[0040] endif

[0041] if stop = 1 then

[0042] G120 CU240E-2 PN inverter 2 heartbeat = 0

[0043] endif

[0044] if local switch = 1 then

[0045] G120 CU240E-2 PN inverter 2 start value = 0

[0046] speed conversion = 0

[0047] endif

[0048] G120 CU240E-2 PN inverter 2 set parameters such as Figure 5 , command data group selection parameters P810 and P811 are interconnected parameters r20160 (corresponding to r2095.0 delay 5s output) and r722.5 respectively.

[0049] r2095.0 within 5 seconds if you can't break, timer time after reaching P810 = 1, touch screen through the script program periodically control inverter parameters P2901 = 100 or P2901 = 0, when P810 = 1 command data group selection is CDS1, (no set action, inverter stop running), when P811 = 1 command data group selection is CDS2 or CDS3 (set two groups of action command is the same, inverter manual analog speed regulation operation).

[0050] start command parameters P840 set, P840[0]=r2094.0 command data group 1 - communication control, P840[1]= command data group 2 - no function setting, P840[2]=r3333.0 through internal BICO interconnection inverter DI0 terminal r722.0 command data group 3 - forward, P840[3]=r3333.0 through internal BICO interconnection inverter DI0 terminal r722.0 command data group 4 - forward, P1113[2]=r3333.1 through internal BICO interconnection inverter DI1 terminal r722.1 command data group 3 - reverse, P1113[3]=r3333.1 through internal BICO interconnection inverter DI1 terminal r722.1 command data group 4 - reverse.

[0051] P1070[0]=P1015[0]=750 r / min, P1070[1]=0, P1070[2]=r755[0] analog terminal A0, P1070[3]=r755[0] analog terminal A0, other parameters P2099[0]=P2900[0], P2099[1]=P2901[0], P2900[0]=100, P2901[0]=100.

Claims

1. A communication device of MCGS touch screen and G120 frequency converter, comprising MCGS touch screen (1), G120 frequency converter (2) and analog quantity speed regulation manual control device (3), characterized in that: The MCGS touch screen (1) includes a network port; the MCGS touch screen (1) is connected to the P1 or P2 network port of the frequency converter control unit through the MGCS network port network line between the MCGS touch screen (1) and the G120 frequency converter (2), and the analog quantity speed regulation manual control device (3) and the G120 frequency converter (2) are connected to the control unit terminal of the frequency converter through a hard wire; the analog quantity speed regulation manual control device (3) is composed of a forward rotation starting switch, a reverse rotation starting switch, a mode conversion switch and a rotary potentiometer; the G120 frequency converter (2) adopts a Siemens G120 CU240E-2 PN frequency converter.

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