vanEssen Diver-MOD-AS339 User manual

PRODUCT MANUAL
Diver-MOD – AS339
M-11118002E
Nijverheidsstraat 30,
6987 EM Giesbeek, The Netherlands
T+31 313 880 200
[e-mail]
Iwww.eijkelkamp.com

© July 2017 Van Essen Instruments. All rights reserved.
Contact details:
Copyright © 2017 by Van Essen Instruments B.V. All rights reserved. This document contains
proprietary information which is protected by copyright. No part of this document may be
photocopied, reproduced, or translated to another language without the prior written consent of
Van Essen Instruments B.V.
Van Essen Instruments B.V. makes no warranty of any kindwith regard to this material, including,
but not limited to, its fitness for a particular application. Van Essen Instruments B.V. will not be liable
for errors contained herein or for incidental or consequential damages in connection with the
furnishing, performance, or use of this material. In no event shall Van Essen Instruments B.V. be
liable for any claim for direct, incidental, or consequential damages arising out of, or in connection
with, the sale, manufacture, delivery, or use of any product. Van Essen Instruments and the Van
Essen Instruments logo, Diver are trademarks or registered trademarks Van Essen Instruments B.V.
The presence of the Waste Electrical and Electronic Equipment (WEEE) marking on the product
indicates that the device is not to be disposed via the municipal waste collection system of any
member state of the European Union.For products under the requirement of WEEE directive
(2012/19/EU), please contact your distributor or local Van Essen InstrumentsB.V. office for the
proper decontamination information and take back program, which will facilitate the proper
collection, treatment, recovery, recycling, and safe disposal of the device.
Nijverheidsstraat 30,
6987 EM Giesbeek, The Netherlands
T+31 313 880 200
[e-mail]
Iwww.eijkelkamp.com

© July 2017 Van Essen Instruments. All rights reserved.
CE COMPLIANCE STATEMENT (EUROPE)
We hereby declare that the device(s) described below are in conformity with the directives listed. In
the event of unauthorized modification of any devices listed below, this declaration becomes
invalid.
Type: Diver interface
Product Model: Diver-MOD (AS399)
Relevant EC Directives and Harmonized Standards:
1999/5/EC R&TTE Directive for Radio and Telecommunications Terminal Equipment in accordance
to annex III to which this directive conform to the followingstandards:
Low Voltage Directive per EN60950-1 (2006)+A11 (2011) for Product Safety testing
standard for "Information Technology Equipment"
EMC Directive EN 301 489-1 V1.8.1 / EN 301 489-17 V1.3.2 Electromagnetic emission and
immunity for "Information Technology Equipment"
2004/108/EC Electromagnetic Compatibility directive, as amended by EN61326-1:2013
The product(s) to which this declaration relates is in conformity with the essential protection
requirements of 2004/108/EC Electromagnetic Compatibility directive. The products are in
conformity with the followingstandards and/or other normative documents:
EMC: Harmonized Standards: EN 61326-1:2013 Lab Equipment, EMC
IEC61000-6-3:2007 Emission standard for residential, commercial and light-industrial
environments
IEC61000-4-2:2009 Electrostatic discharge immunity test
IEC61000-4-3:2006 Radiated, radio-frequency, electromagnetic field immunity test
IEC61000-4-4:2012 Electrical fast transient/burst immunity test
IEC61000-4-5:2006 Surge immunity test
IEC61000-4-6: 2014 Immunity to conducted disturbances, induced by radio-frequency fields
IEC61000-4-11:2004 Voltage dips, short interruptions and voltage variations immunity tests
I hereby declare that the equipment named above has been designed to comply with the relevant
sections of the above referenced specifications. The items comply with all applicable Essential
Requirements of the Directives.

© July 2017 Van Essen Instruments. All rights reserved.
Contents
1 Introduction.............................................................................................................................................1
1.1 Features..........................................................................................................................................1
1.2 System Overview...........................................................................................................................2
2 Getting Started........................................................................................................................................2
2.1 Supported Equipment..................................................................................................................2
2.2 Installation.....................................................................................................................................3
2.3 Configuration.................................................................................................................................3
2.4 Transmission Mode.......................................................................................................................5
2.5 Operation.......................................................................................................................................5
3 Modbus Registers ....................................................................................................................................5
3.1 Reg. 30002, 30012: Firmware Version and Serial Number Diver-MOD.....................................5
3.2 Reg. 30220: Real-time Barometric Data from Diver-MOD.........................................................6
3.3 Reg. 40001: Change Slave Address of Diver-MOD ......................................................................6
3.4 Reg. 40002: Change Baudrate of the RS485 port .......................................................................6
3.5 Reg. 40003: Change Parity of the RS485 port.............................................................................7
3.6 Reg. 00001: Update Real-Time Data from Diver.........................................................................7
3.7 Reg. 00002: Get Diver Data ...........................................................................................................8
3.8 Reg. 00003: Update General Diver Information .........................................................................8
3.9 Reg. 00004: Force to accept new connected Diver ....................................................................8
3.10 Reg. 00011: Start/Stop Logging of Diver.....................................................................................9
3.11 Reg. 30241: Number of Records Recorded by Diver ..................................................................9
3.12 Reg. 30242: Maximum Number of Records for Diver.................................................................9
3.13 Reg. 30243: Remaining Battery Capacity Diver..........................................................................9
4 Reading Diver Data................................................................................................................................10
4.1 Header Information ....................................................................................................................10
4.2 Time Series Data..........................................................................................................................11
5 Appendix A – Specifications.................................................................................................................15
5.1 Casing...........................................................................................................................................15
5.2 Connections.................................................................................................................................15
5.3 Power Consumption...................................................................................................................15
5.4 Modbus.........................................................................................................................................15
5.5 Pressure........................................................................................................................................16
5.6 Temperature................................................................................................................................16
5.7 Environmental.............................................................................................................................16
6 Appendix B - Diver-MOD Register Map................................................................................................17
6.1 Coils – Status Registers...............................................................................................................17
6.2 Read Only Registers ....................................................................................................................17
6.3 Reading Diver Memory................................................................................................................18
7 Appendix C – Pressure Conversion Table ...........................................................................................22
8 Appendix D – Diver Equipment............................................................................................................23
8.1 Communication Cable................................................................................................................23
8.2 TD-Diver........................................................................................................................................23

© July 2017 Van Essen Instruments. All rights reserved.
8.3 Baro-Diver....................................................................................................................................24
8.4 Cera-Diver.....................................................................................................................................24
8.5 Micro-Diver...................................................................................................................................25
8.6 CTD-Diver .....................................................................................................................................25
8.7 Mini-Diver.....................................................................................................................................26
8.8 Baro-Diver....................................................................................................................................26

© July 2017 Van Essen Instruments. All rights reserved.
1
1 Introduction
The Diver-MOD is a Modbus interface for Divers and can be used to connect Divers to a RS485
network using the Modbus/RTU protocol. The Diver-MOD features a barometric sensor, which can be
used to convert the Diver pressure in to a water level.
The Diver-MOD is shown in Figure 1. The Diver-MOD casinghas an M12 connector (left) and a cable
gland (right) and an air vent with a Gore-Tex® membrane. The M12 connector on the left is
connected to a Diver communication cable (part no. AS2xxx) that on its turn is connected to a Diver
(DI5xx, DI6xx, DI7xx, DI8xx, DI27x).
Figure 1 top view of the Diver-MOD (part no AS339).
The cable gland on the right side of the casing is used to connect the Diver-MOD to the Modbus
interface through a 4-conductor cable. This cable is used for power supply and data transfer.
The air vent ensures that the pressure inside the casing is equal to the outside air pressure. The
built-in barometric pressure sensor allows to convert Diver pressure data into water level data.
1.1 Features
The Diver-MOD™ features:
Real-time Diver pressure, temperature and conductivity* data.
Real-time barometric pressure and temperature data.
Reading the Diver memory.
Programming of the Diver sample interval, setting the Diver clock, etc.
Starting/stopping of the Diver.
(* CTD-Diver DI27x only)
The Diver-MOD contains a barometric sensor, but has no built-in datalogger to store the barometric
data. Compensated pressure is not available as this can be done by the back-end software.
This manual outlines all the features and operating principles of the Diver-MOD. The next chapter
gives an overview of the supported equipment, installation procedures and configuration.

© July 2017 Van Essen Instruments. All rights reserved.
2
1.2 System Overview
A typical Modbus configuration is depicted in Figure 2. In the schematic two Diver-MODs are
connected to a PC/PLC. This connection includes both data communication and power. The
maximum Modbus cable length depends on the baud rate,the cable (gauge, capacitance or
characteristic impedance), the number of loads on the daisy chain, and the network configuration
(2-wire or 4-wire). For a maximum baud rateof 9600 and AWG26 or wider gauge, the maximum
length is 1000 meters.
Figure 2 example Modbus network with PC/PLC and2 Diver-MODs.
Each Diver-MOD is connected to a Diver through a Diver communication cable. The maximum length
of the Diver communication cable is 500 meters.
Each Diver-MOD must be programmed with a unique address (0 to 247). Messages sent to the
address 0 will be accepted by all Diver-MODs. The Diver-MOD acts as a slave for the PLC/PC that
requests the data from each Diver-MOD.
Up to 8 Diver-MODs can be used per Modbus network. TheDiver-MOD is powered by the Modbus
network. Each Diver-MOD is equipped with a 120  (1/4 W) termination resistor that can be used by
applying the termination jumper.
The Diver-MOD is in accordance with the Modbus Application Protocol Specification V1.1b3 and
enables to interface Divers in a RS485 network using the Modbus/RTU protocol. The Modbus TCP/IP
is not supported.
2 Getting Started
2.1 Supported Equipment
The Diver-MOD can be connected to a Diver via a Diver Cable AS2xxx using the M12 connector. The
following Divers can be used with the Diver-MOD:
TD and Baro-Diver (model DI8xx),
Mini and Baro-Diver (model DI5xx),
Micro-Diver (model DI6xx),
Cera-Diver (model DI7xx), and
CTD-Diver (model DI27x).
Detailed information about supported equipment can be found in Appendix D.

© July 2017 Van Essen Instruments. All rights reserved.
3
2.2 Installation
Connect the Diver-MOD to a Diver through a Diver communication cable (AS2xxx). Connect the Diver
communication cable to the Diver-MOD by attaching it to the M12 connector.
Connect the PC or PLC to the Diver-MOD using a 4-conductor cable. The 4-conductors are for
5 to 12-volt power supply
ground
RS485-A
RS485B
Feed the Modbus communication and power supply cable into the enclosure through the cable
gland and connect the wires as depicted in Figure 3. The cable gland provides an IP67 sealing for
Modbus cables with a diameter from 3.5 to 7 mm.
Figure 3 Diver-MOD connection to Modbus/RTU (cable colorsmay vary).
The Diver-MOD must be externally powered with +5VDC or +12VDC (4.75 Volt to 13.5 Volt). During
communication the peak current is 50 mA and the effective current is 20 mA. The stand-by current of
the Diver-MOD is 2 mA.
If the Diver-MOD is the last device in the RS485 network, the A and B line should be terminated with a
120  termination resistor. This can be done by placing jumper JP1, see Figure 3.
There is one signal indicator (LED) which will light up briefly when the Diver-MOD is powered on. In
addition, the LED will blink when there is activity on the RS485 communication line. When the Diver-
MOD is in standby, the LED will be off.
2.3 Configuration
Diver-MOD is designed to communicate on a Modbus network using RTU (Remote Terminal Unit)
mode. The ASCII (American Standard Code for InformationInterchange) mode is not supported by
the Diver-MOD.
The default serial settings are 9,600 bps, no parity and 1 stop bit. If the serial settings are changed by
Modbus function codes, the changes take place after repowering.
The default Diver-MOD address is 1. If the slave address is changed by Modbus function codes, the
change takes place immediately.

© July 2017 Van Essen Instruments. All rights reserved.
4
The master issues a Modbus request to the slaves in two modes:
In unicast mode, the master addresses an individual slave. After receiving and processing
the request, the slave returns a message (a 'reply') to the master. In that mode, a Modbus
transaction consists of 2 messages: a request from the master, and a reply from the slave.
Each slave must have a unique address (from 1 to 247) so that it can be addressed
independently from other nodes.
In broadcast mode, the master can send a request to all slaves. No response is returned to
broadcast requests sent by the master. The broadcast requests are necessarily writing
commands. All devices must accept the broadcast for writing function. The address 0 is
reserved to identify a broadcast exchange.
The Modbus RTU frame format for the Diver-MOD is shown in Figure 4. The client that initiates a
Modbus transaction builds the Modbus Protocol Data Unit (PDU) represented by the green blocks in
Figure 4, and then adds the address and error check(CRC) to build the appropriate communication
PDU.
A master addresses a slave by placing the slave address in the address field of the message. When
the slave returns its response, it places its own address in the response address field to let the
master know which slave is responding.
The function code indicates to the server what kind of action to perform. The function code can be
followed by a data field that contains request and response parameters.
All Diver-MOD commands contain checksum information (CRC), to enable detection of transmission
errors. Error checking field is the result of a "Redundancy Checking" calculation that is performed on
the message contents. The Diver-MOD uses the RTU calculation method for the CRC.
Details about the different fields of the Modbus frame for the Diver-MOD can be found in Table 1. The
Diver-MOD interface supports the function codes listed in Table 2.
Figure 4 Modbus message frame for the Diver-MOD on a serial line.
Table 1 Diver-MOD frame format.
Name Length (bits) Function
Start 28 At least 3½ characters times of silence (mark condition)
Address 8 Slave address
Function 8 Indicates the function code; e.g., read coils/inputs
Data N × 8 Data + length will be filled depending on the message type
CRC 16 Checksum
End 28 At least 3½ character times of silence between frames

© July 2017 Van Essen Instruments. All rights reserved.
5
Table 2 Diver-MOD function codes.
Function name Function code Function type
Read Coils 0x01 (decimal 1) Internal Bits or Physical Coils
Write Single Coil 0x05 (decimal 5) Internal Bits or Physical Coils
Read Input Registers 0x04 (decimal 4) Physical Input Registers
Read Holding Registers 0x03 (decimal 3) Internal Registers or Physical Output Registers
Write Single Register 0x06 (decimal 6) Internal Registers or Physical Output Registers
Write Multiple Registers 0x10 (decimal 16) Internal Registers or Physical Output Registers
2.4 Transmission Mode
The format for each byte (11 bits) for the Diver-MOD is:
Coding System: 8–bit binary
Bits per Byte: 1 start bit
8 data bits, least significant bit sent first
1 bit for parity completion
1 stop bit
2.5 Operation
The Diver-MOD acts as an interface between the Diver anda Modbus network, i.e. it converts the
Modbus commands to Diver commands and vice-versa. There is no direct communication between
the Modbus supervisory computer and the Diver. The Diver-MOD acts as a buffer between the
supervisory computer and the Diver. For example, to get a real-time value from the Diver, first a
command must be sent from the supervisory computer to the Diver-MOD. Then the Diver-MOD will
retrieve the real-time values from the Diver and store them in its internal memory. Finally, the
supervisory computer can send a command to the Diver-MOD to retrieve the real-time values.
3 Modbus Registers
All the supported Modbus registers of the Diver-MOD are listed in Appendix B. A more detailed
description of themost important registers is given below. Refer to Table 2 for the definition of the
function code.
All registers in this document are 1-based.This means the actual packets sent to the Diver-MOD
must have a data address 1 less than what the register number is in this document.
3.1 Reg. 30002, 30012: Firmware Version and Serial Number Diver-MOD
The firmware version and serial number of the Diver-MOD are stored in register 30001 and 30011