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ANPR

5.3.3 RS485 SERIAL PORT

It is possible to send messages to the RS485 serial port. The messages must be enabled in the Events / Actions

settings table. Tags are used to define the content of the message sent. See chapter 5.2.6.4.

Below the RS485 serial port configuration is shown:

Enable: It allows enabling or disabling communication through the serial port.

Baud rate: Serial port communication speed. Default 9600.

Parity: Serial port parity checking. Default NONE.

Data Bit: Serial port number of data bits. Default 8.

Stop Bit: Serial port number of stop bits. Default 1.

Message: Message protocol format. Default RAW format. This format syntax can fully be

specified using the web interface. See chapter 5.2.6.4.

Using the PROTOCOLLED format involves a message header, footer and acknowledge

packets. See packet formats below.

Wait ACK: It allows enabling/disabling the confirmation signal sent by the external unit upon

data receiving. Only when in protocolled mode.

Timeout ms: It allows specifying the time (in milliseconds) of waiting for an answer from the

external unit (only when in protocolled mode).

Retry Number: It allows specifying the number of times to resend unacknowledged messages to the

external receiving unit (only when in protocolled mode).

Protocolled data packet format:

Value Length (in bytes) Description

0x89ABCDEF 4 Open message code.

<ID> 4 Message ID number. Start at 1, incremented upon every message.

<LEN> 4 Data size in bytes.

<DATA> <LEN> Packet data. As specified in chapter 5.2.6.4.

<XOR> 1 Checksum. Xor of all previous bytes.

0x12345678 4 Close message code.

Protocolled acknowledge packet format:

Value Length (in bytes) Description

0xA5 1 Open message code.

<ID> 4 Message ID number. Must be the same as the ID of the received message.

0x5E 1 Close message code.

5.3.4 FIRMWARE

It is possible to update the ANPR firmware. The firmware update requires one file only, where operating system,

application and configuration files are integrated. The firmware file is distributed as a .bin-file.

Two possible update options are available:

7. Upgrade firmware keeping current settings.

8. Upgrade firmware with default settings (network settings will remain unchanged).

Nedap ANPR User Manual

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