MTS Systems Level Plus STI Bedienungsanleitung

lSensors Division

Level Plus®

Tank Gauging Systems

Side Tank Indicator (STI)

Installation & Operation Manual

0796 550436 Revision A

GENERAL INFORMATION

MTS PHONE NUMBERS

To place orders: 800-457-6620

Application questions: 800-457-6620

Service: 800-457-6620

Fax: 800-943-1145

SHIPPING ADDRESS

MTS Systems Corporation

Sensors Division

3001 Sheldon Drive

Cary, North Carolina 27513

HOURS

Monday - Friday

7:30 a.m. to 5:30 p.m. EST/EDT

Section TABLE OF CONTENTS Page

1.0 INTRODUCTION 1

1.1 Specifications 3

2.0 INSTALLATION 4

2.1 Mounting The Enclosure 5

2.2 Cable Requirements 7

2.3 Recommended Cable Types 17

2.4 How To Select Cables 21

2.5 Field Wiring Installation 30

2.6 Power Supply Requirements 34

2.7 Switch Settings 35

2.7.1 Default Setting 35

2.7.2 DIP Switch #1 36

2.7.3 DIP Switch #2 (Stand-Alone Mode — Commands/# of Gauges) 38

2.7.4 DIP Switch #2 (Network Mode — Address) 40

2.7.5 Push Button Switch #3 41

2.8 Initial Power Up 41

2.9 Display Contrast Adjustment 43

3.0 OPERATION 44

3.1 Stand-alone Mode 44

3.2 Network Mode 47

3.3 General Network Mode Protocol Information 49

3.4 Network Mode Timing Considerations 55

3.5 Command Protocol 60

3.6 LCD Display and Optional Back Light 82

3.7 Programming The STI 83

3.7.1 Programming Control Code and Mode Switch 84

3.7.2 Programming Alarm Set Points 86

3.7.3 Programming Custom Command Table 86

3.8 Error Codes 87

4.0 TROUBLESHOOTING AND MAINTENANCE 89

4.1 Cable Isolation and Connectivity Tests 91

4.2 Current Tests 91

4.3 Using Built-in Diagnostics 93

4.4 Replacing Printed Circuit Boards 95

4.5 Upgrading Firmware 96

APPENDIX A - References 97

1.0 INTRODUCTION

The Side Tank Indicator (STI) is part of the MTS Level Plus®product

line. It it offers a liquid crystal display (LCD) to indicate tank condi-

tions, an EIA-485 serial interface and a NEMA 4 type enclosure. The

LCD consists of sixteen seven-segment characters and thirty-one special

icons that indicate various tank conditions. The STI is compatible with

other MTS Level Plus digital EIA-485 devices including:

• Direct Digital Access (DDA) tank gauges

• Level Plus Tank Gauge Monitor

• Level Plus System80 (LPS80)

• HT-100 Hand Held Terminal

The STI has two modes of operation.

1. Network Mode: In this mode, the STI represents one slave device on

the multi-drop network controlled by a host device such as the Level

Plus Tank Gauge Monitor or LPS80.

2. Stand-Alone Mode: In this mode the STI assumes the role of host and

it is in control of the network. A single STI module can interrogate up

to eight DDA tank gauges and display level and temperature data

received from them.

The STI electronics include three printed circuit boards: the base board,

the microprocessor board, and the display board. The standard STI

housing is a NEMA 7 type enclosure. The cover has heat-treated glass,

wrenching lugs and a neoprene gasket seal. The base board mounts to

the bottom of the enclosure with four screws. The microprocessor and

display PCBs form an “electronics module” (hereafter referred to as the

module), which plugs into the base board mounted at the bottom of

the enclosure. No screws or spacers are required to attach the module

to the base board. The module is contained in a plastic shroud, and

can be easily be removed so that field wiring can be installed. Field

wiring is made to the P1 and P2 terminal blocks which are located on

the base board, under the module.

The STI display and the DDA gauge when combined with a Level Plus

Monitor (or with a PC that is running LPS80™ software) can be config-

ured for various applications. This manual covers only the STI display.

When necessary, you may need to consult manuals for the other

devices when designing your tank gauging system.

Other manuals:

• Level PlusTank GaugeMonitor Installationand OperationManual (P/N550421)

• DDA Tank Gauge Installation and Operation Manual (P/N 550164)

• Hand-Held Terminal (HT100) Operation Manual (P/N 550424)

• LPS80 Installation and Operation Manual (P/N 550429)

1.1 Specifications

Environmental:

Operating Temperature: Electronics: -40 to 176°F (-40 to 80°C)

LCD: 14 to 158°F (-10 to 70°C)

Storage Temperature -40 to 185°F

(-40 to 85°C)

Humidity: 0% to 100% R.H.*

Vibration: TBD

Shock: TBD

Mechanical:

Enclosure: NEMA 4 (outdoor)*

Mounting: Supported by rigid conduit or by cus-

tomer provided bracket

Entry Points: (2) - 3/4” NPT

Electrical:

Input Voltage: 24 to 26 Vdc

Sleep Mode Current: 1.5 mA maximum

Operating Current: 15 mA maximum

Back Light Current: 50 mA maximum (optional)

Display: Custom Liquid Crystal Display

Display Precision: ±0.01” (decimal mode)

±1/16” (fractional mode)

Display Contrast: User adjustable

Serial Interface: EIA-485

8 - Bit ASCII MTS Protocol

Communications:

Baud Rate: 4800

Parity: Even

Data Bits: 8

Stop Bits: 1

Safety Approvals (pending):

• Factory Mutual Research Corporation (FMRC) intrinsic safety approval

for Class I, II, III, Division 1, Groups C, D, E, F, and G hazardous areas.

• FMRC dust ignition-proof for Class II and III, Division 1, Groups E, F,

and G hazardous areas.

• FMRC approval for outdoor NEMA 4 locations*.

* With proper installation and conduit seals

2.0 INSTALLATION

STI installation has three phases: (1) mounting the enclosure,

(2) wiring, (3) and setup. Each phase of installation will be discussed in

detail. Guidelines will be presented for each phase. Before proceeding

with the installation, identify the mode that you want the STI to operate

in (i.e., Stand-alone or Network). If the STI is going to be operated in a

hazardous environment, the system must be installed according to MTS

drawing #650591. Special precautions are necessary when installing and

operating the STI in an intrinsically safe environment. Throughout this

manual, the appropriate instructions are dependent upon the mode of

operation selected. Special instructions or recommendations are given

when intrinsic safety is required. Pay special attention to the setup

phase. In the setup phase, the user must set switch configurations

defined by the mode of operation selected.

Figure 2.1 STI Enclosure Dimensions

lLEVEL PLUS

SIDE TANK INDICATOR

Prod. Type

Model No.

Serial No.

Mfg. Date

Side Tank Indicator

5.00 in.

(127 mm)

2.25 in.

(57.15 mm)

5.00 in.

(127 mm)

4.25 in dia.

(107.95 mm)

3.75 in.

(95.25 mm)

1.00 in. (25.4 mm)

3/4 NPT

(2 places)

CAUTION:

Always verify that the power is OFF

before installing or removing the

Microprocessor / Display “module”. Use

caution when handling this assembly.

Use static sensitive device handling pro-

cedures. Do not allow contaminants to

enter the assembly when it is removed

from the housing. Place the module in a

safe, clean environment until installed.

2.1 Mounting The Enclosure

Mount the STI on a flat, vertical surface. Choose a surface that

is free from obstructions that would make viewing the display

or removing the cover difficult. Also, take into account the

location of the sun or other light sources and how it might

affect the ability to view the LCD display clearly (without

glare). The STI enclosure should have plenty of clearance for

protective conduits. The STI base board can be removed and

rotated 90 degrees to allow the enclosure to be mounted in a

vertical or horizontal position. Conduits should also be sealed

and routed in a fashion to keep liquids from entering the

enclosure. See figure 2.2.

Figure 2.2 Mounting Orientation

lLEVEL PLUS

SIDE TANK INDICATOR

Seal unused entry

Cable Gland or

Chico Seal Here

Vertical mounting orientation

(thisviewshownwith electronicmodule removed)

One of four screws.

Remove all four screws

to rotate baseboard

Cable Gland or

Chico Seal Here

Horizontal mounting orientation

Before mounting, consult the National Electrical Code (NEC)

and local electrical codes as necessary in reference to mount-

ing NEMA 4 style enclosures. The enclosure is supported by

protective conduit on one or two sides (3/4” NPT fittings). If

the conduit is going to be connected on one side only, the

other entry point on the opposite side must have a protective

seal installed. Support the conduit as close as possible to the

enclosure. If conduits are going to connect to both sides of the

enclosure, then both conduits should be supported close to the

STI unit.

Remove the cover from the enclosure by rotating it counter

clockwise. Remove the electronics module from the enclosure

by putting your thumb and index finger on the outer groove of

the plastic shroud and pulling the module toward you. It is not

necessary to remove any of the screws from the front bezel to

remove the electronics module. Place the module in a safe

place where it will be protected from dirt and other contami-

nants. It is recommended that the module be placed into the

box that the STI was received in until it is needed. The base

board should remain mounted in the enclosure. See MTS draw-

ing 650597 in section 2.5 for wiring termination information.

Be careful when working with the enclosure to avoid damage

to the base board inside the enclosure. After the enclosure has

been mounted and the wiring completed, be sure to remove all

metal shavings and/or wire strands that may cause damage to

the STI electronics (use of a vacuum is recommended).

Reinstall the electronics module, then replace the enclosure

cover and tighten for proper seal.

CAUTION:

Chico seals or cable glands are recom-

mended to keep moisture that may be

present in the wiring conduits from

entering the STI enclosure.

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