RS485 communication line production, connection operation instructions

485 communication uses two lines, one of which is defined as positive and one of which is defined as negative. The 485 communication line is made according to the following relationship:

Data + Connect Data +

Data - Connect Data -

The interface of the conversion card is marked with DATA+, DATA-, and the interface of the implement 485 and the conversion card interface can be connected according to the above corresponding relationship.

Faced with crystal head copper, starting from the left, 1 foot is positive, 2 feet are negative

When using multiple devices, it is necessary to use 485 network networking. The bus uses one of the five types of shielded wires, and the device is connected to the bus according to the 485 wiring method. Note: The tools in the network cannot be duplicated, otherwise they will not be able to communicate.

Enter the device management interface through 'Device Management'. After entering, right click on Add in the device list on the left to add hardware. There are several points to note when adding devices:

1. The equipment type must be selected according to the equipment model. The 380 series card issuer selects the attendance machine, and the K6 series equipment selects the S600.

2. The machine number must be corresponding and there is no repetition. The factory default machine number is 1. Only the device can be changed to change the hardware machine number through the 'Change Machine Number' in the device management. The physical number of the same port cannot be connected normally.

3. COM port must be selected correctly (most desktop PC COM 1 can be viewed in the hardware management of the computer system)

4. The baud rate must correspond to the hardware. The factory default value is 9600. It can only be modified by 'Modify Baud Rate' after connecting the device.

Press the F1 to view the machine number, and the 380 device to check the machine number and baud rate by #+7. The default machine number of the access control is 1.

If you forget the changed access control number, you can enter the interface and enter the serial number in 'Change machine number' to modify the forgotten machine number.

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