Garnet SEELEVEL 828 Manuel utilisateur

Printed in Canada

www.garnetinstruments.com

MODEL 828 MANUAL

Serial Interface

Page 2 828 Manual

Table of Contents

CHAPTER 1 - OVERVIEW.............................................................................................3

CHAPTER 2 - DESCRIPTION.......................................................................................4

CHAPTER 3 - INSTALLATION GUIDE.......................................................................7

CHAPTER 4 - SERIAL COMMANDS.........................................................................8

CHAPTER 5 - TROUBLESHOOTING GUIDE......................................................... 19

CHAPTER 6 - SERVICE AND WARRANTY INFORMATION............................ 20

MAIL IN WARRANTY ................................................................................................. 21

GARNET

SEELEVELTM

Serial Interface

MODEL 828

828 Manual_v7.2 - 04-Sep-2018

Page 3

828 Manual

CHAPTER 1 - OVERVIEW

Congratulations on purchasing the Garnet Instruments Model

828 SEELEVEL™ Serial Interface. The Model 828 is designed to

interface up to six 808P2/810PS2 displays or one 806B display to

a standard RS232 serial connection for data acquisition. This can

be connected to a remote computer, PLC or cellular modem and

an external printer can be attached to a second serial port to print

receipts for historical PTO events. There is a Power Take Off (PTO)

sense line to determine when transmitted data is required. This

prevents false readings from being transmitted while the truck is

moving.

Page 4 828 Manual

CHAPTER 2 - DESCRIPTION

The 828 has a 4x16 LCD display to congure the setup options,

verify connections, help with troubleshooting, and to display

the levels of the SEELEVEL™ gauges. The number of levels displayed

corresponds to the number of compartments congured.

Historical PTO events are saved to memory. These events log the

time and volume when a PTO is turned on and when the PTO is

turned off. The PTO events can be retrieved from memory through

the serial connection, or time stamped receipts can be printed

using a portable printer.

Many of the 828 keypad buttons require a ve digit numeric

password authentication before they can be used. The default

password is “11111”. Entering the last three characters ‘111’

correctly provides Level 1 Access which enables the CLOCK button.

Entering all ve digits correctly provides Level 2 Access allowing all

functions. The PRINT, LIGHT, VERSION, and DATALOG buttons are

always available. Access to Level 1 and 2 expires after 10 minutes.

The password can be changed using the Set Password Key serial

command. If in Geotab New (mode 2) the password “99991”

will provide access to the MENU button functionality to change

the mode back to ASCII (mode 0) so the Set Password Key serial

command could be used to reset the password.

Description of Keypad Buttons:

ENTER button: This button is used to store setup changes into

programmer memory.

ESC button: This is used to exit various menus.

button: This button is used to navigate through setup menus.

button: This button is used to navigate through setup menus.

button: This button is used to navigate through setup menus.

button: This button is used to navigate through setup menus.

PRINT button: Select a tank and historical PTO event to print and

send its level out the printer serial port .

LIGHT button: This turns the display backlight on and off.

SHIFT button: This button is used to select the button functions

printed in red. SHIFT must be held down while pressing the other

button.

Page 5

828 Manual

SET CLOCK+SHIFT button: Set the on board real time clock.

Use the up and down buttons to change the highlighted time/

date, and the sideways buttons to select which item to set. Use

the ENTER button to save the time and date shown, and exit the

menu. To exit the menu without saving, use the ESC button.

SET PTO POLARITY+SHIFT button: Select whether the PTO is

active when high or low polarity is present on the PTO wire. Use

the up and down buttons to change the selection. Use the ENTER

button to save the value shown, and exit the menu. To exit the

menu without saving, use the ESC button.

SET PTO PULLUP+SHIFT button: Select whether the PTO pull-up

is on or off. Use the up and down buttons to change the selection.

Use the ENTER button to save the value shown, and exit the menu.

To exit the menu without saving, use the ESC button.

SET PTO DELAY+SHIFT button: Sets the delay after the PTO is

engaged or disengaged before a serial data transmit is done. Use

the up and down buttons to change the value shown. Use the

sideways buttons to select the engage or disengage delay. Use

the ENTER button to save the value shown, “st” will be shown for a

couple of seconds to verify that the value has been stored. Once

the new values have been stored, use the ESC button to exit the

menu. Any changes made after pressing the ENTER button will

not be stored.

VERSION+SHIFT button: Shows the hardware and software

version of the 828.

SET NO. TANKS+SHIFT button: Set the number of compartments

to be monitored and displayed on the LCD screen for updates. This

should match the number of SEELEVEL™ gauges. Use the up and

down buttons to change the value shown. Use the ENTER button

to save the value shown, and exit the menu. To exit the menu

without saving, use the ESC button. Currently, 806 gauges can

only monitor compartment one. The 806 gauge must be viewing

compartment one to work.

SET TX INTERVAL+SHIFT button: Sets the interval between

automatic serial data transmissions of the levels shown on the

display. This can be from 1 to 99,999 seconds. Use the up and

down buttons to change the highlighted digit. Use the sideways

buttons to select a different digit. Use the ENTER button to save

the value shown, and exit the menu. To exit the menu without

saving, use the ESC button.

Page 6 828 Manual

SET TX IN OPTIONS+SHIFT button: Sets the transmit interval

options. The 828 can be congured to send or not send interval

updates during the time that the PTO is disengaged. Updates are

always sent during the time that the PTO is engaged. Use the up

and down buttons to change the selection. Use the ENTER button

to save the value shown, and exit the menu. To exit the menu

without saving, use the ESC button.

MENU button: Sets the 828 Mode and Gauge type. Use the up

button to set the 828 to 806 gauge viewing compartment one.

Use the down button to set the 828 to use 808 and 810 gauges.

Use the right and left buttons to select ASCII (mode 0), Geotab Old

(mode 1), or Geotab New (mode 2) serial transmit modes. Use ESC

button to exit.

In mode 0, which is the default, ASCII characters are sent out when

PTO changes occur, interval updates are sent, and compartment

data has been scanned.

In mode 1, Geotab’s RS232 Extended Data Message Format GO2/

GO3/GO4 is used when PTO changes occur and interval updates

are sent.

In mode 2, Geotab’s Third Party Data (Message Type 0x80) protocol

is used when PTO changes occur and interval updates are sent.

DATA LOG button: Send all the historical PTO events out the

serial port.

DATA LOG+ SHIFT button: Clear all historical PTO events from

memory.

Note that if one of the set menus is entered and there has been

no button pressed for one minute, the menu will automatically exit

without saving. This way the system cannot be accidentally left in

one of the set menus where it will not respond to serial data.

Page 7

828 Manual

CHAPTER 3 - INSTALLATION GUIDE

1. The 828 is not weatherproof. The connectors on the ends of

the 828 need to be clear of obstructions. Ensure that the unit

is mounted in an appropriate location.

2. The 828 needs to be supplied with +12VDC from the truck

through a 1 amp fuse along with a good chassis ground.

3. One signal wire needs to be fed from the truck’s PTO to the

PTO INPUT on the 828. This wire needs to either have an active

high or active low signal.

4. The six remote inputs allow a single 828 to communicate with

up to six different SEELEVEL gauges. Connect the remote outputs

from the SEELEVEL 806B, 806Bi, 808P2 or 810PS2 systems to

the REMOTE wire inputs on the 828. NOTE: The ground used

for the 828 has to be the same ground connection used for

the 806B, 808P2 or 810PS2.

5. Connect the serial data port to the serial device using a

standard 9 pin serial cable.

6. The serial port settings for both serial ports are 9600 baud, no

parity, 8 data bits, 1 stop bit ASCII communications.

Printer Tx

RS232Rx

RS232Tx

+12 VDC

Ground

PTO

Remote 1

Remote 2

Remote 3

Remote 4

Remote 5

Remote 6

Printer

Serial Port Serial Data

Port

Page 8 828 Manual

CHAPTER 4 - SERIAL COMMANDS

The following section describes the dened 828 serial commands.

The serial data requests are ASCII data strings. Throughout

this section <CR> represents a single carriage return character

(hexadecimal 0x0D). In this section Red text represents serial

data being received by the 828. Blue text represents serial data

being transmitted from the 828. Either uppercase or lowercase

characters can be used, the response will be in the case that is

used to make the request.

Set Password Key

‘k=11111’ sets the ve digit numeric password key.

k=11111<CR>

k,11111<CR>

Request Password Key

‘k’ requests the the ve digit numeric password key.

k<CR>

k,11111<CR>

Set Gauge Type (808/810 or 806)

Set the type of gauge connected to the 828. ‘g=0’ for 808 or 810,

‘g=1’ for 806.

808 or 810 806

g=0<CR> g=1<CR>

g,0<CR> g,1<CR>

Request Gauge Type (808/810 or 806)

‘g’ requests the type of gauge connected to the 828.

808 or 810 806

g<CR> g<CR>

g,0<CR> g,1<CR>

Currently, 806 gauges can only monitor compartment one. The

806 gauge must be viewing compartment one to work.

Page 9

828 Manual

Mode conguration

The 828 can be set up to operate in three modes of operation.

‘m=0’ sets mode 0, ‘m=1’ sets mode 1, and ‘m=2’ sets mode 2.

IMPORTANT NOTE: The 828 only accepts serial commands when

in mode 0 or 1. If the 828 is set to mode 2 via a serial command,

it can only be set back to mode 0 or 1 via the front keypad MENU

button.

m=0<CR> m=1<CR> m=2<CR>

m,0<CR> m,1<CR> m,2<CR>

In mode 0, which is the default, ASCII characters are sent out when

PTO changes occur, interval updates are sent, and compartment

data has been scanned.

In mode 1, Geotab’s RS232 Extended Data Message Format GO2/

GO3/GO4 is used when PTO changes occur and interval updates

are sent.

In mode 2, Geotab’s Third Party Data (Message Type 0x80) protocol

is used when PTO changes occur and interval updates are sent.

Request Mode

‘m’ requests the mode from the 828.

Mode 0 Mode 1

m<CR> m<CR>

m,0<CR> m,1<CR>

Page 10 828 Manual

PTO change (Mode 0)

During normal operations, a change of PTO status causes the 828

to send out a comma separated list of values corresponding to the

PTO status followed by the number of channels being monitored.

The transmit is done after a programmable delay.

p,E,11.16,79.00, 0.00, 0.00, 0.00, 0.00<CR>

The next example shows the PTO disengaged and only two

channels being monitored.

p,D,11.16,79.00<CR>

The next example shows the PTO engaged and all six compartments

having invalid data.

p,E,NOSIG,NOSIG,NOSIG,NOSIG,NOSIG,NOSIG<CR>

The level reading will always be ve characters including the

decimal place. If no decimal place is present a space character will

pad the least signicant byte. NOSIG shows no valid level data.

ERROR shows level data error.

PTO change (Mode 1)

During normal operations, a change of PTO status causes the 828

to send out a message compatible with Geotab’s “RS232 External

Data Message Format GO2/GO3/GO4”.

Byte Value Description

0STX 0x02

1 Message Type 1 0x01

2 Body Length (x) 1-27

3 to 2+x Data x byes of data, max of 30 bytes

3+x to

4+x

Checksum 2 byte checksum (big endian) of

bytes 0 to 2+x with 0x01 added

to each byte before summing

5+x ETX 0x03

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