User`s manual

Appendix CIP Report Protocol

There are several ways to configure the IP address of the NPort device server. One of them is

DHCP Client. When you set up the device server to use DHCP Client for IP address configuration,

it will automatically send a DHCP request over the network to find the DHCP server. The DHCP

server will then send an available IP address to the NPort with an expiration time. The NPort will

use this IP address until the expiration time has been reached. When the expiration time has been

reached, the process will repeat, and NPort will send another DHCP request to the DHCP server.

Therefore, an NPort may end up using more than one IP address while it is connected to the

network.

The NPort has a built-in IP address report function that will send its IP data to a specific IP address

and port number when it is configured with a dynamic IP address. In the web console, the IP report

parameters may be configured under Network Settings. Enter the IP address and the port number

of the PC that is to receive this information, as well as the reporting interval

To interpret the IP address report, the destination PC needs to have NPort Administrator installed

with the IP Address Report function activated. You may also use develop your own application to

receive the IP address report by referring to the IP report protocol described here. An example

program is provided on the MOXA website at

www.moxa.com.

IP Address Report Structure

The first 4 bytes of the module’s IP address report are the characters “MOXA”. The rest of the

report is composed of 9 items, with each item preceded by a 2-byte header indicating the item ID

and item length.

Header

(Item ID)

Header

(Item Length)

Item

(none) (none) “MOXA” (text string)

1 (varies) server name (text string)

2 2 hardware ID (little endian, see table below)

3 6

MAC address (00-90-E8-01-02-03 would be sent in sequence as

0x00, 0x90, 0xE8, 0x01, 0x02, 0x03)

4 4 serial number (little endian DWORD)

5 4 IP address

6 4 netmask

7 4 default gateway

8 4

firmware version (little endian DWORD, Version 4.3.1would be

0x04030100)

9 4 AP ID (little endian DWORD, see table below)