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PLC, control power configuration
Selection of PLC
This system is based on the design of Mitsubishi FX3U series PLC. For different cascade numbers, select PLC models and expansion modules according to Table 1 and Table 2:
Table 1: Standard Features
No. of cascades | Recommend PLC | Expansion module |
4~6 | FX3U-64MR/ES-A | FX2N-2DA *1 FX3U-485-BD *1 |
7~8 | FX3U-80MR/ES-A | |
9~13 | FX3U-128MR/ES-A |
Table 2: Extended Features
No. of cascades | Recommend PLC | Expansion module |
4 | FX3U-64MR/ES-A | FX2N-2DA *1 FX3U-485-BD *1 |
5~6 | FX3U-80MR/ES-A | |
7~12 | FX3U-128MR/ES-A |
3.2 PLC terminal configuration overview
3.2.1 In order to make the system have strong configurability to facilitate customers and reduce system cost as much as possible, the functions of all PLC terminals have been predefined and cannot be changed. So be sure to wire according to the wiring diagram and use the correct normally open/normally closed contacts to avoid logic and action errors.
3.2.2 Please use DC24V driven indicator lights, intermediate relays, alarms and other external devices.
3.2.3 All input terminals of PLC are valid when they are connected to 0V terminal. Means that all input switches are considered active when closed.
3.3 PLC terminal configuration and wiring of standard function version
Terminal No. | Function | Illustrate |
0V | public | Common terminal of PLC input signal |
X0 | count pulse | Pulse signal input terminal of external measuring device, the maximum pulse frequency is 20K |
X1 | The whole machine is running | Connect to the running switch of the whole machine, when the terminal is valid, the whole machine runs |
X2 | normal parking | Connect the stop switch, when the terminal is valid, the whole machine decelerates to stop |
X3 | emergency pull over | Connect the emergency stop switch, when the terminal is valid, the whole machine will stop in an emergency |
X4 | Inverter fault | Connect to the fault relay terminals of each inverter. When the terminals are valid, the whole machine will stop in an emergency. |
X5 | fault reset | Connect the fault reset button, when the terminal is valid, the system resets the fault |
X6 | disconnection fault | When the disconnection detection switch is connected, when the terminal is valid, the system stops and enters the fault state. |
X7 | shield signal | Connect the protective cover switch. When the terminal is valid, the system will execute emergency stop or low-speed operation according to the setting. |
X10 | Meter reset/fast | Access meter reset and quick stop buttons. If this terminal is valid during operation, it will execute quick stop; |
X11 | fast stop | After parking, if this terminal is valid, the meter/weight data will be reset to zero. |
3.3.1 PLC input terminal:
X0~X7 and X10~X11 of PLC input terminals are fixedly configured as common signals, as shown in the following table:
Other input terminals of PLC, used for jogging and front and rear connection signals, are arranged according to the following rules:
X12~X14 are used for the first unit, X15~X17, X20 are used for the second unit, X21~X24 are used for the third unit, X25~X27, X30 are used for the fourth unit, and so on.
Note: the last connection has only three input terminals, and there is no “machine front connection” terminal.
For the specific functions of each terminal in each connection, please refer to the description in Section 2.5.6.4.
3.3.2 PLC output terminalsPLC output terminals Y0~Y7 are fixedly configured as common signals, as shown in the following table:
Terminal No. | Function | Illustrate |
Y0 | Running lights | When the system is running, this terminal is turned on and is used to connect the 24V signal lamp |
Y1 | Fault indicator | When the system fails, this terminal is turned on and is used to connect the 24V signal lamp |
Y2-Y5 | - | Vacant without function |
Y6 | inverted signal | Connect to the terminal defined as No. 2 function (F/R) of each inverter |
Y7 | fault reset signal | Connect to the terminal defined as No. 10 function (RST) of each inverter |
The other output terminals of PLC are led by the rewinding couplet, starting from Y10, every 3 is a group, and they are arranged in order.
Y10~Y12 are used for rewinding, Y13~Y15 are used for the first, Y16~Y17, Y20 are used for the second, Y21~Y23 are used for the third, Y24~Y26 are used for the fourth, and so on analogy.
In each group, each terminal is defined as:
The first one is used to control the 24V intermediate relay, and control the operation of the inverter, the operation of the motor fan, and the action of the brake through the contacts of this relay, such as Y10, Y13, Y16
The second one is used for coasting to stop, connected to the FRS terminal of the corresponding inverter, such as Y11, Y14, Y17
The third one is used for constant speed control, and is connected to the terminal defined as function No. 28 (speed given switching) of the corresponding inverter, such as Y12, Y15, Y20.
3.3.3 The partial wiring of PLC terminals is shown in Figure 3, which shows the arrangement of PLC input and output terminals.
Please note that the input terminal wiring in this diagram is drawn according to the "mode 1" in 2.5.6.18 for the jog and cascade switches. For other jog cascade switch configurations, refer to the instructions in Section 2.5.6.18.
Starting from the second unit, each unit is arranged consecutively, and the wiring sequence of each unit is the same as that of the second unit.