PR Elecronics 4801 Guide

4801
Modbus gateway
Installation and
connection guide
No. 4801V100 - UK

(1349)
PR electronics A/S tilbyder et bredt program af analoge og digitale
signalbehandlingsmoduler til industriel automation. Programmet
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PR electronics A/S oers a wide range of analogue and digital
signal conditioning devices for industrial automation. The product
range includes Isolators, Displays, I.S. Interfaces, Temperature
Transmitters, and Universal Devices. You can trust our products in
the most extreme environments with electrical noise, vibrations and
temperature fluctuations, and all products comply with the most
exacting international standards. »Signals the Best« is the epitome
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PR electronics A/S ore une large gamme de produits pour le
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4801V100-UK 1
4801 MODBUS GATEWAY
INSTALLATION AND
CONNECTION GUIDE
CONTENTS
Setting up the 4801 gateway ......................................................................... 2
Change from point to point communication
to LAN communication................................................................................... 8
Change LAN communication setup
back to point to point communication..................................................... 12
4801 gateway specifications........................................................................... 17
Modbus basics......................................................................................................... 19

2 4801V100-UK
Setting up the
4801 gateway

4801V100-UK 3
Setting up the 4801 gateway
A PC or MAC Computer must be used to setup the 4801 gateway.
If you are not able to maintain an internet connection -
while connected to the 4801 gateway - then you have to download a
certificate for your user ID.
A user ID can easily be created by entering www.pps.prelectronics.com
- the only requirement for doing this is to be on the internet.
Web browser requirements for your PC or MAC:
Internet Explore 9 or newer version
Firefox 22 or newer version.
Please note: Firefox must be used as web brow-
ser if you are using a PC running Windows XP.
Typical PPS setup:
LAN1
or

4 4801V100-UK
Setting up the 4801 gateway
Enter - www.pps.prelectronics.com
Download and install the plugin -
this by selecting: ”Download Plugin for this Browser”
When you have - downloaded the certificate to your Com-
puter, you will be directed to the ”Discovery” view page.
Press this link - to download a plugin certificate for
o-line use, which means setting up the 4801 gateway
without any internet connection.

4801V100-UK 5
24 VDC supply
Setting up the 4801 gateway
Save pre://self/discover - on your favorite list for easy future access.
Please make sure - that your Computer IP settings are set to dynamic.
Connect the 4801 gateway LAN2 (general configuration port)
- directly to your Computer by using a standard Ethernet cable.
It may take some minutes - before the connection is established.
LAN2

6 4801V100-UK
Setting up the 4801 gateway
Select the 4801 gateway - from the local device list.
The 4801 gateway seriel number is a part of the device name.
Log in with your user ID - if you do not yet have a user ID, you
have to create one by going to www.pps.prelectronics.com.
Press “Refresh” - to update the list with local found devices.

4801V100-UK 7
Setting up the 4801 gateway
It is now possible - to configure the LAN1 and LAN2
ports of the 4801 gateway, and also possible to change
the settings on the Modbus RTU serial ports (P1 and P2).
Port 1 & 2 - Modbus RTU communications
LAN1 - Ethernet for PPS application
LAN2 - TCP/IP Ethernet

8 4801V100-UK
Change from
point to point
communication to
LAN communication

4801V100-UK 9
Change from point to point communication
to LAN communication
Enter the ”Discovery” view page - to get here please refer to
the ”Setting up the 4801 gateway” guide found at page 2.
Press “Refresh” - to update the list with available local devices.
Select the 4801 gateway, ”device s/n”-config.pps.prelectronics.com,
from the devices list.

10 4801V100-UK
Change from point to point communication
to LAN communication
Give the 4801 gateway - an available IP address on your local
network. Press “Apply” to acknowledge.
An example:
A Computer on the local network has the following setup:
IP: 192.168.1.126 and Subnet Mask: 255.255.255.0.
Configure the 4801 gateway as the following:
IP: 192.168.1.X - where X is a number between 1 and 255.
(Make sure the number isn’t used by another device).
Subnet Mask: 255.255.255.0

4801V100-UK 11
Press “Yes” - to confirm and use the new settings.
The 4801 gateway will now reboot.
Connect the LAN2 port - on the 4801 gateway - to the
local network, by using a standard Ethernet cable.
You can now - use TCP/IP communication from any device,
connected to the local network.
Please note - it is now only possible to access the
configuration via your local network.
Change from point to point communication
to LAN communication

12 4801V100-UK
Change LAN
communication setup
back to
point to point
communication

4801V100-UK 13
There are two ways to do this...
Select the 4801 gateway - from the available local devices list.
Method 1 (recommended):
Connect to “pre://self/discover” - in your browser, by using a
Computer connected to the local network.
Press “Refresh” - to update the list with local devices.
Change LAN communication setup
back to point to point communication
Please note:
If no devices appears in the local network list,
please check the Firewall settings for your network.

14 4801V100-UK
Change the IP settings - of the 4801 gateway -
back to default settings, which are:
IP: 169.254.0.10 and Subnet mask: 255.255.0.0
Press “apply” - to accept the changes.
Change LAN communication setup
back to point to point communication

4801V100-UK 15
The 4801 gateway - will now reboot.
Connect the LAN2 port - on the 4801 gateway - to the
Computer using an Ethernet cable. You can now use TCP/IP
communication from Computer directly through LAN2.
Please note - It is now only possible to communicate with
the 4801 gateway via TCP/IP by using a direct wired con-
nection to the LAN2 port.
Press “Yes” - to confirm and use the settings.
Change LAN communication setup
back to point to point communication

16 4801V100-UK
Press and activate - the reset button for 10 seconds;
this will restore the settings to default, and clear the
created user list.
After the reset - the 4801 gateway will have the follo-
wing (default) settings:
IP: 169.254.0.10 and Subnet Mask: 255.255.0.0.
Connect the LAN2 port - on the 4801 gateway - to the
Computer using an Ethernet cable. You can now use TCP/
IP communication from Computer directly through LAN2.
Please note - It is now only possible to communicate
with the 4801 gateway via TCP/IP by using a direct
wired connection to the LAN2 port.
Method 2:
(Only use this method if you can’t find the IP address of the gateway)
Change LAN communication setup
back to point to point communication

4801V100-UK 17
4801 gateway
specifications

18 4801V100-UK
TYPE 4801................................................................. Modbus Gateway
Applications................................................................ PPS application communications
gateway and Modbus RTU to
Ethernet Modbus TCP/IP gateway.
Specifications:
Supply voltage.......................................................... 12...48 VDC - 4.5 W - max. 340 mA
Operating temperature.......................................... -10...+60 °C
LAN1, RJ45................................................................. PPS communication port
”device s/n”.pps.prelectronics.com
- IP: Dynamic
LAN2, RJ45................................................................. Modbus TCP/IP - IP: 169.254.0.10 -
Subnet mask: 255.255.0.0
Port 1 and 2, DB9 male......................................... Modbus RTU over RS - 485
(default baud rate: 57.6k bps)
Upto 32 PR 4511 devices can be
connected directly to each Port.
Accessories................................................................. 2 pcs. of SUB-D9 to RJ45 cables are
included (200 mm) - for conneting
the 4511 devices to the Modbus
RTU P1 and P2 ports.
4801 gateway specifications