APG RST-5003 User manual

APG
R
Doc #9004240
Rev A1, 05/2016
RST-5003 Control Module
User Manual
Web Enabled Series

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Table of Contents
Introduction ................................................................................................................ iii
Warranty and Warranty Restrictions.................................................................... iv
Chapter 1: Specications and Options..................................................................... 1
Dimensions ........................................................................................................................................1
Specications ................................................................................................................................... 2
Model Number Congurator.......................................................................................................... 3
System Wiring Diagrams ............................................................................................................3-5
Chapter 2: Installation and Removal Procedures and Notes..............................6
Tools Needed..................................................................................................................................... 6
Connection Notes............................................................................................................................. 6
Electrical Installation ..................................................................................................................... 6
Software Setup ............................................................................................................................ 7-11
Removal Instructions ....................................................................................................................11
Chapter 3: Programming with Modbus TCP/IP...................................................12
Modbus Polling via Ethernet with Modbus TCP/IP...........................................................12-13
RST-5003 Generic Modbus Register List................................................................................... 13
Modbus Programming of Individual Sensors.......................................................................... 14
Chapter 4: RST-5003 Embedded Web Server........................................................14
Accessing the RST-5003 Embedded Web Server .................................................................... 14
Navigating the RST-5003 Embedded Web Server ..............................................................14-15
4-20 mA Sensor Input Conguration Submenus.............................................................. 16-29
Modbus Sensor Conguration Registers............................................................................ 30-32
RST-5003 Utility Menus ......................................................................................................... 33-36
Chapter 5: Maintenance ...........................................................................................37
General Care.................................................................................................................................... 37
Repair and Returns........................................................................................................................ 37

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Introduction
Thank you for purchasing an RST-5003 Web Enabled Control Module from APG. We appreciate your
business! Please take a few minutes to familiarize yourself with your RST-5003 and this manual.
The RST-5003 Web Enabled Control Module oers a wide degree of integrated, exible, remote and local
control and monitoring for your system. The RST-5003 can control up to 10 APG Modbus sensors--any
combination of level, pressure, magnetostrictive and ultrasonic--along with one 4-20 mA sensor, and two
input or output relay terminals. All readings are available for control and monitoring via TCP/IP for local
or remote network access. The RST-5003 also had exible power options: it can use either POE or an
independent 12-28 VDC power source.
Reading your label
Every APG controller comes with a label that includes the controller’s model number, part number, and
serial number. The RST-5003 label also indicates the default IP address, subnet mask, and mac address.
Please ensure that the model number on your label matches your order.

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Warranty and Warranty Restrictions
This product is covered by APG’s waranty to be free from defects in material and workmanship under
normal use and service of the product for 24 months. For a full explanation of our Warranty, please visit
https://www.apgsensors.com/about-us/terms-conditions. Contact Technical Support to recieve a Return
Material Authorization before shipping your product back.
Scan the QR code below to read the full explanation of our Warranty on your tablet or smartphone.

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Chapter 1: Specications and Options
• Dimensions
2
4
V
BG
N
D
A
7/8” 4”
4 1/2”

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Communications
Digital Output Ethernet TCP/IP Modbus
Ethernet TCP/IP to internal web page
Ethernet TCP/IP to APG-provided website
0-2 Isolated Solid State Relays
Inputs RS-485 Modbus
4-20 mA
0-2 Discrete Switches
Electrical
Operational Supply Voltage (at sensor) 48 VDC via POE (requires injector or switch)
12-28 VDC
Current Draw 40 mA @ 48 VDC
Power Rating 2.0 W Max
Issolated SSRs 120V, 120 mA Max
Accuracy
Resolution 12 bit
Environmental
Operating Temperature -40 to 60°C (-40 to 140°F)
Materials of Construction
Housing Polyamide
Mounting
33 mm Din-Rail
Compatible APG Modbus Senors
Ultrasonic MNU
Magnetostrictive MPX-E1, MPX-R1
Pressure PT-400-L5, PT-400-L31, PT-500-L5, PT-500-L31
Controllers DCR-1006A, MND
• Specications

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• Model Number Congurator
Model Number: RST - _____
A
A. Model
□ 5003 2 relay outputs
□5013 1 relay output, 1 switch input
□5113 2 switch inputs
External 12-28 VDC Source Wiring
• System Wiring Diagrams
To Network
Connection
Input for supply
voltage when
using a non-POE
power source
To 12-28 VDC
Power Source
2
4
V
4
2
0
G
N
D
G
N
D
RST-5003

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POE (Power over Ethernet) Wiring
POWER
LAN + DC LAN
To Network Connection
To AC
power POE
Power
Injector
Provides 24 VDC
to supply a 4-20 mA
device when the RST
is powered via POE.
2
4
V
4
2
0
G
N
D
G
N
D
RST-5003
NOTE: A POE-enabled
Ethernet switch eliminates
the need for a POE Power
Injector.
2
4
V
B
G
N
D
A
(Ethernet Port)
270 Ω
terminating
resistor at
last sensor
Sensor 3
V+
A
B
GND
Trunk Line
Sensor 1
V+
A
B
GND
Sensor 2
V+
A
B
GND
Use shielded cable
Sensor Line Drops
Equivalent 270 Ω
terminating resistor
internal to RST-5003
Note: Terminating resistor size recommended
based on input resistance of RST-5003. Length
of cable and overall impedence of network may
necessitate a dierent size resistor.
Modbus Sensor Daisy-chain Wiring

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System Overview - RST-5003 with Modbus and 4-20 mA sensors and Internet Connection
Network / Internet Connection
Computer
on
Local
Network
Computer
on
Internet
MNU Ultrasonic Sensors MP Magnetostrictive Float Level Sensors
4-20 mA Input
(2) Solid State Relays
Modbus
Input
Connection
to
Internet
Server Hosting
Website and
Logged Data
4-20 mA Type Level Sensor
RST-5003

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Chapter 2: Installation and Removal Procedures and Notes
• Connection Notes
• Up to 10 Modbus sensors can be connected to the RST-5003 in any combination.
• Only one 4-20 mA sensor can be connected to the RST-5003.
• You do not need any tools to install your RST-5003. Please consult each sensor’s user manual for any
sensor installation notes and instructions.
• Tools Needed
• Connect any 4-20 mA sensor, relays, or switched inputs rst.
• Connect RST to Ethernet/network.
• Connect independant 12-28 VDC supply if not using POE.
• Connect and set up one Modbus sensor at a time.
• Electrical Installation
NOTE: For any APG sensor user manual, please visit http://apgsensors.com/support.
IMPORTANT: Each Modbus sensor must be connected to the network individually and
assigned a unique Sensor Number before the next sensor can be added.
IMPORTANT: Multiple Modbus sensors added to the network simultaneously are all
assigned the same Modbus address/sensor number: 1. Sensors MUST be added to the
network individually.

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Initial setup of the RST-5003 and individual Modbus sensors is done via an embedded web server. The page
can be accessed by using either the serial number or local IP address of the RST-5003 and a web browser
(Internet Explorer, Chrome, Firefox, etc).
• Software Setup
The easier way to access the embedded web server is to type rst_xxx into a web browser on a computer
connected to the same local network as the RST-5003. xxx represents the numeric portion of the RST-5003’s
serial number. See Figures 2.1 and 2.2.
Accessing RST-5003 Embedded Web Server
NOTE: If your web browser performs a web search for “rst_xxx” istead of loading the
page, type “http://rst_xxx”.
Figure 2.1
Figure 2.2
Some networks will block this direct access to the RST-5003. If this is the case, you will need to use the IP ad-
dress of your RST-5003 to access the embedded web server. The IP address can be obtained two ways: ask
your local network administrator, or logon to your APG-provided website, www.levelandow.com.
NOTE: Port 6700 must be open on your local network for the RST-5003 to connect.

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Figure 2.3
From the list of sensors at this site, select the sensor with the serial number that corresponds to the new
RST-5003. (See Figure 2.4.)
Figure 2.4
After logging on to your APG-provided website, a list of sites will be displayed on your screen (see Figure
2.3). Select the site where the new RST-5003 is installed.

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Figure 2.5
On the Sensor Information screen you will see
the IP Address of the newly installed RST-5003.
(See Figure 2.5.)
Type the RST’s IP address into your browser’s
address bar (See Figure 2.6).
Figure 2.6
Logging on to the RST-5003 Embedded Web Server
The RST’s embedded webpage should now be open, showing the Main Display page (See Figure 2.7). This
page lists the sensors attached to the RST-5003 and displays each sensor’s current reading. A 4-20 mA sen-
sor will have “Analog Input” as its Sensor Number. The congured sensor number for each Modbus sensor
will show as its Sensor Number. Every new Modbus sensor defaults to sensor number 1.
IMPORTANT: Multiple Modbus sensors added to the network simultaneously are all
assigned the same sensor number: 1. Sensors must be added to the network individually.
Figure 2.7
NOTE: For further information on using your APG-provided remote website, please
visit www.apgsensors.com/support for a user manual, or contact us at 1-888-525-7300.

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Click on Home to bring up the Menu page (See Figure 2.8). The rst menu link clicked during each session
will prompt a User Name and Password login for the RST-5003 (See Figure 2.9). The default User Name is
admin, and the default Password is password.
Figure 2.8 Figure 2.9
Assigning Modbus Senor Numbers
Click on RS-485 Network Settings to bring up the RS485 Settings page. (See Figure 2.10.) See section RS-485
Network Settings for a full descrition of each parameter in this menu (Page 36).
Figure 2.10
NOTE: See the Security Setting Menu (Page 35) to change this user name and pass-
word.

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IMPORTANT: None of parameters in the RS485 Settings menu automatically update.
Each one must be manually congured.
• Disconnect power to the RST-5003 rst.
• Disconnect network connection.
• Disconnect any sensors, relays, and switched inputs.
• Remove the RST-5003 and store it in a dry place, at a temperature between -40° F and 180° F.
• Removal Instructions
NOTE: If you control the power to each Modbus sensor seperately, powering up a new
sensor after assigning a Modbus address to the previous sensor will allow you to assign
an address to the new sensor without leaving the RS845 Settings Menu.
Change Numb of Sensors On Line to relfect the total number of Modbus sensors you will be connecting. Click
Change to send the new value to the RST-5003.
With Sensor Number to View set to 1 (for the latest sensor added to the Modbus network), set New Sensor
Number to the highest available number. Click Change to send the new value to the RST-5003.
Repeat this process for each Modbus sensor as it is added to the network.

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Chapter 3: Programming with Modbus TCP/IP
Using the RST-5003’s IP address, and port number 502, readings can be polled from the RST-5003 for any
attached sensors via RS-485 Modbus commands. Up to 14 32-bit Input Registers, beginning with register
298, can be polled with a single command. Below is a sample Modbus command illustrating the necessary
syntax.
Example:
00 01 : Transaction Identier
00 00 : Protocol Identier
00 06 : Message Length (6 bytes to follow)
0B : The Reporting Unit Identier [i.e., Sensor Number] (0B hex = 11)
04 : The Function Code (04 = read Input Registers)
01 2E : The Data Address of the rst register requested. (12E hex + 1 = 303)
00 02 : The total number of registers requested. (read 2 registers, i.e. 303 to 304)
Byte order (hex values)
00 01 00 00 00 06 0B 04 01 2E 00 02
Notes:
• Reporting Unit indicates the sensor reading being polled from the RST-5003, in hex. 01 - 0A are for Mod-
bus sensors 1 - 10 attached to the RST-5003. 0B reads the interpreted values from the 4-20 mA sensor
attached to the RST-5003. Unused registers (i.e., those not associated to an attached sensor) will return
zeros when polled.
• Function Code 04 reads the Input Registers. No other functionality (e.g., polling from or writing to
Holding Registers) is supported via Modbus TCP/IP with the RST-5003. Complete control functionality is
available through the embedded web server and through your APG-provided website (www.leveland-
ow.com).
• Data Address of registers, decimal to “hex minus 1” conversion:
Decimal Address Hex minus 1 Decimal Address Hex minus 1
299 12A 306 131
300 12B 307 132
301 12C 308 133
302 12D 309 134
303 12E 310 135
304 12F 311 136
305 130 312 137
• Modbus Polling via Ethernet with Modbus TCP/IP

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• Total number of registers requested, up to 14, given in hex:
# of Registers Hex equivalent # of Registers Hex equivalent
01 01 08 08
02 02 09 09
03 03 10 0A
04 04 11 0B
05 05 12 0C
06 06 13 0D
07 07 14 0E
• RST-5003 Generic Modbus Register List
Input Registers (0x04)
Register Returned Data
30299 Sensor Type
30300 Distance/Level 1, Top (in mm, unsigned)
30301 Distance/Level 2, Bottom (in mm, unsigned)
30302 Sensor Temperature Reading (in 0C, signed)
30303-30304 Calculated 1 (raw)
30305-30306 Calculated 2 (raw)
30307 (upper bits) Version
30307 (lower bits) Signal Strength
30308 Battery Voltage
30309 (upper bits) Sensor Trip 1 Alarm
30309 (lower bits) Sensor Trip 1 Status
30310 (upper bits) Sensor Trip 2 Alarm
30310 (lower bits) Sensor Trip 2 Status
30311 (upper bits) Sensor Trip 3 Alarm
30311 (lower bits) Sensor Trip 3 Status
30312 (upper bits) Sensor Trip 4 Alarm
30312 (lower bits) Sensor Trip 4 Status
This is the list of generic Input Registers for polling the RST-5003 and any connected sensors. Actual regis-
ters used vary by sensor. Please see the user manual for each sensor for a full and accurate list of registers.
NOTE: For more information about Modbus RTU, please visit www.modbus.org.

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The RST-5003 does NOT support full Modbus programming of attached sensors. Full control and congu-
ration of individual sensors is supported through the RST-5003’s embedded web server and through the
APG-provided webpage, www.levelandow.com.
• Modbus Programming of Individual Sensors
NOTE: For any APG sensor user manual, please visit http://apgsensors.com/support.
Chapter 4: RST-5003 Embedded Web Server
See the Software Setup section of chapter 2 (pages 7 - 9) for instructions for accessing and signing into the
RST-5003 embedded web server.
• Accessing the RST-5003 Embedded Web Server
The RST-5003 embedded web server has two primary screens--the Main Display Page (Figure 4.1) and Menu
Page (Figure 4.2)--and a screen for each of 9 submenus. The submenus can be understood in three groups:
• 4-20 mA Sensor Input Conguration Submenus
Application Parameters
Analog Parameters
• Modbus Sensor Conguration Registers
RS-485 Modbus Input Reg
RS-485 Modbus Holding 1
RS-485 Modbus Holding 2
• RST-5003 Utility Menus
Network
Security
Labels
RS-485 Network Settings
The Menu Page also has a link back to the Main Display Page.
• Navigating the RST-5003 Embedded Web Server

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Figure 4.1
Figure 4.2

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• 4-20 mA Sensor Input Conguration Submenus
Analog Application Settings
Figure 4.3
The Application Parameters menu congures the application-specic parameters applied to the calculated
reading from the 4-20 mA sensor.
PARAMETER RANGE
Units 1 - feet
2 - inches
3 - meters
Units is used to select the units of measurement for distance or level applications. The units will also
determine the resolution of Calculated Units, 4ma Value, 20ma Value, Window, Current Reading (See Figure
4.5), and all of the Application Parameters (See Figure 4.3). The resolution is: feet 0.01, inches 0.1, and
meters 0.001.