Offshore 5801 User manual

V
BENNETT® TRIM TAB ADAPTOR
WITH NMEA2000®, CAN BUS
AND RS485 RTU MODBUS INTERFACES
PART NUMBERS: 5801
USER MANUAL
Revision 1.0.1

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1 Introduction ...................................................... 2
1.1 Firmware Revision ........................................... 2
1.2 Product Features ............................................. 2
2 Installation ........................................................ 3
2.1 Unpacking the box............................................ 3
2.2 Mounting the unit ............................................ 3
2.3 Connecting the Deutsch Plug ............................ 4
2.4 Unit Switch Settings ......................................... 5
3 Calibration......................................................... 6
4 Maintenance ...................................................... 7
5 Technical Specication ........................................ 8
6 Technical Support .............................................. 10
7 Warranty .......................................................... 11

INTRODUCTION
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The Offshore Dynamics 5801 Bennett Trim Tab Adaptor is designed to measure the inductive
sensors in Bennett Trim Tabs and relay their position over multiple interfaces.
The Trim Tab Adaptor is water resistant to IP65. It is designed to be mounted case up in a
protected location. It is essential that it is installed and set up correctly according to this
manual. Please read and follow the installation and setup instructions carefully to achieve the
best results.
1.1 FIRMWARE REVISION
The information in this manual corresponds to rmware revision 1.1.4
1.2 PRODUCT FEATURES
The Offshore Dynamics 5801 Bennett Trim Tab Adaptor has the following features:
•Convert up to three inductive sensors inside
Bennett Trim Tabs to a percentage position
message for display.
•Switch settable CAN bus output to either
NMEA2000® or a xed source address.
•RS485 RTU Modbus output suitable for use
by a PLC based system.
•Green/Red LEDs conrming receipt and
transmission of valid or invalid RS485 modbus
messages.
•One button calibration.
•Connection by waterproof Deutsch Connector
and NMEA2000® plug.
•IP68 protected.

INSTALLATION
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101.6
121.5
134.7
74.9
41
2 x 7.4
118.7
35.9
33.7
20.7
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2.1 UNPACKING THE BOX
You will nd the following items in the 5801 shipping box:
1 x 5801 Bennett Trim Tab Adaptor
1 x 5801 User Manual (This document)
3 x 5801-R Trim Tab Remote
2.2 MOUNTING THE UNIT
The unit should be mounted to a at surface using 2 mounting screws. The unit dimensions and
mounting holes locations are shown in the following drawing:

Calibrate
STBD Modbus
PORT CENT
GND P1 P2 GND C1 C2
GND S1 S2 GND A B
NMEA2000®/
Fixed address
Power input
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2.3 CONNECTING THE DEUTSCH PLUG
The unit is connected to the sensors and the communications interfaces via the 12 way Deutsch
plug according to the following connection table:
Pin Number Connection
1 Modbus B
2 Modbus A
3 Modbus Ground
4Starboard S2
5Starboard S1
6Starboard GND
7Port GND
8Port P1
9Port P2
10 Central GND
11 Central C1
12 Central C2

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2.4 UNIT SWITCH SETTINGS
During initial installation, the unit needs to be opened and switches set to match the units
interface connection.
If the unit is to be used with a xed source address style CAN bus interface, then the xed
address mode switch needs to be set to the ON position and the xed source address set in
the Hi and Lo order rotary switches. If the unit is to be used as an NMEA2000® sensor then the
Device Instance should be set in the two small rotary switches. These would normally both be
set to “0”
Modbus
It is possible to select Modbus baud rate and parity using SW1 ; please refer to the table 1
below. Note: Modbus is only available in NMEA2000®mode.
The 5801 MODBUS frame consists of 8 data bits, 1 parity bit, and 1 stop bit. Please refer to
Modbus specication for further information.
Modbus Commands
The 5801 Trim Tab Adaptor identies as slave 48 (0x30) and supports one command (0x3) [Read
Holding Registers].
Any request for registers not implemented will result in error code (0x2) [Illegal Address] to be
returned.
Any request for a command that is not implemented will result in error code (0x1) [Illegal
Instruction] to be returned.
Please refer to table 2 for memory locations.
Recommended Usage
We recommend that the device is polled at a maximum of once per second. Ideally this request
should handle all 3 registers; however, the ability to poll individual registers is implemented as
per MODBUS specication.
SW1 Baud Rate Parity
09600 Even
19600 Odd
219200 Even
319200 Odd
438400 Even
538400 Odd
6-F 9600 Even
Memory
Location Address H Address L Data H Data L
40000 00 00 00 Port Tab Pos
40001 00 01 00 Stbd Tab Pos
40002 00 02 00 Cent Tab Pos

CALIBRATION
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Please note that during the calibration procedure the unit will not attempt to transmit any
positional messages.
The unit is calibrated as follows:
•Power up the device.
•Press the calibrate button so that the white calibration LED illuminates.
•Actuate each sender between it’s highest and lowest positions so the 5801
can learn where these limits are.
•Press the calibrate button again so the calibrate LED turns off.
•The unit will now transmit standard messages including the position
of each sensor between its limits.

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MAINTENANCE
●Clean the unit with a soft cloth.
●Do not use chemical cleaners as they may remove paint or markings or may
corrode the enclosure or seals.
●Ensure that the unit is secure using the mounting holes on the device and
cannot be moved relative to the mounting surface.
●Check the security of the cables connected to the NMEA2000® connector,
tighten if necessary.

5TECHNICAL SPECIFICATION
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Offshore Dynamics are constantly improving their products. Specications are subject to
change without notice. Offshore Dynamics products are designed to be accurate and reliable,
however, they should only be used as aids to navigation and not as a replacement for traditional
navigation aids and techniques.
Specications
NMEA2000® Parameter Group Numbers (PGNs)
Modbus RS885 RTU Memory Locations
Parameter Comment
Accuracy ±2%
No. of Inductive sensors Up to 3
Type PGN No PGN Name
Monitor PGN130576 Trim Tab Status
Protocol PGN126464 Tx/Rx PGN List
PGN126996 Product Information
PGN059392 ISO Acknowledge
PGN059904 ISO Request
PGN060928 ISO Address Claim
PGN126208 Command/Request Group
Memory Location Name Size and Range
0x4000 Port Tab Position UINT16 0 - 100 decimal
0x4002 Stbd Tab Position UINT 16 0 – 100 decimal
0x4004 Central Tab Position UINT16 0 – 100 decimal