FieldServer FS-8700-101 User Manual

-

A Sierra Monitor Company

Driver Manual

(Supplement to the FieldServer Instruction Manual)

FS-8700-101

Setra Digital Pressure Gage Model 370

APPLICABILITY & EFFECTIVITY

Effective for all systems manufactured after May 1, 2001

Driver Version: 1.00
Document Revision: 7

FS-8700-101 Setra Model 370 Digital Pressure Gage Manual Table of Contents

TABLE OF CONTENTS

1. SETRA MODEL 370 DIGITAL PRESSURE GAGE DESCRIPTION.................................3

2. DRIVER SCOPE OF SUPPLY...........................................................................................4

2.1. Supplied by FieldServer Technologies for this driver ...................................................4

2.2. Provided by the Supplier of 3rd Party Equipment.......................................................... 4

2.2.1. Required 3rd Party Hardware.....................................................................................4

2.2.2. Required 3rd Party Configuration...............................................................................4

3. HARDWARE CONNECTIONS ..........................................................................................5

3.1. Hardware Connection Tips / Hints................................................................................6

4. CONFIGURING THE FIELDSERVER AS A SETRA MODEL 370 DIGITAL PRESSURE

GAGE CLIENT .............................................................................................................................7

4.1. Data Arrays/Descriptors ...............................................................................................7

4.2. Client Side Connection Descriptors.............................................................................. 8

4.3. Client Side Node Descriptors .......................................................................................8

4.4. Client Side Map Descriptors .........................................................................................9

4.4.1. FieldServer Related Map Descriptor Parameters......................................................9

4.4.2. Driver Related Map Descriptor Parameters ..............................................................9

4.4.3. Timing Parameters....................................................................................................9

4.4.4. Map Descriptor Example #1 – Read Pressure........................................................10

4.4.5. Map Descriptor Example #2 – Read Status............................................................11

4.4.6. Map Descriptor Example #3 - Verify........................................................................12

5. CONFIGURING THE FIELDSERVER AS A SETRA MODEL 370 DIGITAL PRESSURE

GAGE SERVER..........................................................................................................................13

5.1. Server Side Connection Descriptors...........................................................................13

5.2. Server Side Node Descriptors ....................................................................................14

5.3. Server Side Map Descriptors...................................................................................... 15

5.3.1. FieldServer Specific Map Descriptor Parameters ...................................................15

5.3.2. Driver Specific Map Descriptor Parameters............................................................15

5.3.3. Server Map Descriptor Example. ............................................................................16

APPENDIX A. ADVANCED TOPICS ......................................................................................17

Appendix A.1. How Data Gets Stored ..................................................................................17

Appendix A.1.1. Pressure Data.........................................................................................17

Appendix A.1.2. Status Data.............................................................................................17

Appendix A.2. Gage Pressure Units ..................................................................................... 18

Appendix A.3. Driver Limitations & Exclusions ..................................................................... 18

APPENDIX B. TROUBLESHOOTING TIPS............................................................................19

Appendix B.1. Connection Tips & Hints................................................................................19

APPENDIX C. DRIVER ERROR MESSAGES........................................................................20

Appendix C.1. Exposing Driver Diagnostic Statistics............................................................21

Appendix C.2. Standard Driver Stats....................................................................................22

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com

Tel: [phone] Fax: [phone] Toll_Free: 888-509-1970 email: [e-mail]

FS-8700-101_Setra Model 370 Digital Pressure Gage Manual Page 3 of 23

1. Setra Model 370 Digital Pressure Gage Description

The ‘Setra Model 370 Digital Pressure Gage’ driver allows the FieldServer to transfer data to
and from devices over either RS-232 or RS-485 using the ‘Setra Model 370 Digital Pressure
Gage’ protocol. The FieldServer can emulate either a Server or Client.

The driver implements a subset of the commands and responses that an actual Setra Model
370 Digital Pressure Gage is capable of. Thus the driver permits the transfer of current pressure
information, Gage status information and the processing of Gage verification information.

The driver is capable of providing active Client and passive Server support. An active Client
polls for data and processes responses, it is not capable of processing unsolicited messages
from the remote device. A passive Server can respond to polls but is not capable of sending
unsolicited messages reporting change of state or other information.

When configured as a Client it is important the digital Gage is configured correctly and that it is
left in an operational mode where it can respond easily to the commands sent to it. If a user,
were to operate the Gage from its front panel and leave it in a configuration state, awaiting input
from a user, then the Gage would be incapable of responding to commands from the
FieldServer. The driver cannot write to the digital Gage. Thus alarm set points and other
configuration tasks cannot be performed using a FieldServer.

Max Nodes Supported

FieldServer
Mode

Client 1

Nodes Comments

This is a nodeless protocol. Only one Server per FieldServer
port.

Server 1 This is a nodeless protocol. Only one Client per FieldServer port.

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com

Tel: [phone] Fax: [phone] Toll_Free: 888-509-1970 email: [e-mail]

FS-8700-101_Setra Model 370 Digital Pressure Gage Manual Page 4 of 23

2. Driver Scope of Supply

2.1. Supplied by FieldServer Technologies for this driver

FieldServer Technologies
PART #

Description

FS-8917-01 Connector, 25 pin male: Connects to DCE, RTS/CTS loop
FS-8700-101 Driver Manual.

2.2. Provided by the Supplier of 3rd Party Equipment

2.2.1. Required 3rd Party Hardware

Part # Description

M370 SETRA DIGITAL PRESSURE GAGE

2.2.2. Required 3rd Party Configuration

The M370 Gage must be configured using the operator’s manual and the front panel
push buttons so that its serial port settings match the FieldServer settings.

The following notes have been extracted from the operator’s manual.

The Setra Digital Pressure Gage is capable of interfacing with a wide variety of computers or
other devices through the RS-232 serial communications port. Devices which are connected this
way must be set up to communicate at the same rate of speed. To change the baud rate of the
gage (the rate at which the gage sends information out through the port) so it agrees with that of
the device connected to it, use the following procedure.

1. Press CONV until the gage is displaying pressure units (make sure it is not displaying in "ft" or

"meters").

2. Press the "-" key.

3. Enter "5555". This is the baud rate access code.

4. Press SETUP. The display will read "CAL br".

5. Enter the baud rate. Choose either 300, 600, 1200, 1800, 2400, 3600, 4800or 9600.

6. Press SETUP.

The baud rate is factory set to 2400. If you change the baud rate and wish the gage to retain the
new rate after power is removed and restored, repeat steps 2-6 a second time.

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com

Tel: [phone] Fax: [phone] Toll_Free: 888-509-1970 email: [e-mail]

FS-8700-101_Setra Model 370 Digital Pressure Gage Manual Page 5 of 23

3. Hardware Connections

The FieldServer is connected to the rear side of the Model 370 Digital Pressure Gage as shown
in the following connection drawing.

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com

Tel: [phone] Fax: [phone] Toll_Free: 888-509-1970 email: [e-mail]

FS-8700-101_Setra Model 370 Digital Pressure Gage Manual Page 6 of 23

3.1. Hardware Connection Tips / Hints

The following notes are extracted from the Setra 370 Operator Manual.

The Setra Digital Pressure Gage implements the majority of the RS-232 communications standard,
but does not provide handshaking lines (such as busy, DSR, or DTR). The four lines which must be
connected are diagrammed below, along with the pin layout of the female connector on the back of
the gage.
13 7 3 2 1
O O O O O O O O O O O O O
O O O O O O O O O O O O
25 14

Pin Desc.

1 Protective ground
2 Input to gage (RXD)
3 Output from gage (TXD)
7 Signal ground

The Model 370 serial interface is a DCE (Data Communications Equipment) type, with a standard
female DB25S pin connector. This means that it receives data on pin 2 and sends data on pin 3. This
is in contrast to DTE (Data Transmission Equipment) which receives data on pin 3 and sends data on
pin 2. The RS-232 standard describes communications between DTE and DCE devices.

Since many computers have serial ports configured as DTE, the Model 370 conveniently plugs
directly into the standard serial port on most computers, using a standard RS-232 "straight-through"
cable available from SETRA, or from any computer hardware vendor. Some devices, including some
printers and computers, will be equipped with DCE interfaces like that in the Model 370. To connect
the Model 370 to these devices, a "null modem" cable is required. This is simply a cable which
connects pin 2 and 3 of the Model 370 to pin 3 and 2 of the other device respectively by crossing
them in the cable. This kind of cable is also available from SETRA, or from any computer hardware
vendor.
The maximum recommended cable length is 15 meters.

The RS-232 data format used by the Model 370 is:
8 bits, 1 start bit, 1 stop bit, no parity.

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com

Tel: [phone] Fax: [phone] Toll_Free: 888-509-1970 email: [e-mail]

FS-8700-101_Setra Model 370 Digital Pressure Gage Manual Page 7 of 23

4. Configuring the FieldServer as a Setra Model 370 Digital Pressure Gage
Client

For a detailed discussion on FieldServer configuration, please refer to the FieldServer
Configuration Manual. The information that follows describes how to expand upon the factory
defaults provided in the configuration files included with the FieldServer (See “.csv” sample files
provided with the FieldServer).

This section documents and describes the parameters necessary for configuring the FieldServer
to communicate with a Setra Model 370 Digital Pressure Gage.

4.1. Data Arrays/Descriptors

The configuration file tells the FieldServer about its interfaces, and the routing of data
required. In order to enable the FieldServer for Setra Model 370 Digital Pressure Gage
communications, the driver independent FieldServer buffers need to be declared in the
“Data Arrays” section, the destination device addresses need to be declared in the “Client
Side Nodes” section, and the data required from the Servers needs to be mapped in the
“Client Side Map Descriptors” section. Details on how to do this can be found below.

Note that in the tables, * indicates an optional parameter, with the bold legal value being the
default.

Section Title

Data_Arrays

Column Title Function Legal Values

Data_Array_Name Provide name for Data Array

Provide data format. Each Data Array can
only take on one format.
For this driver, FieldServer recommends

Data_Array_Format

Data_Array_Length

Example

// Data Arrays
Data_Arrays
Data_Array_Name, Data_Format, Data_Array_Length,
DA_PRESSURE, FLOAT, 200
DA_STATUS, FLOAT, 200
DA_DI_01, Bit, 200

DA_DO_01, Bit, 200

the use of a FLOAT Data Array. This is
because the pressure and status settings
are reported as real signed numbers with
some significant digits after the decimal
point.
Number of Data Objects. Must be larger
than the data storage area required by the
Map Descriptors for the data being placed
in this array.

Up to 15 alphanumeric
characters

Float, Bit, UInt16,
SInt16, Packed_Bit,
Byte, Packed_Byte,
Swapped_Byte

1-10,000

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com

Tel: [phone] Fax: [phone] Toll_Free: 888-509-1970 email: [e-mail]