FieldServer Computer Drive FS 8700 115 User Manual

-
A Sierra Monitor Company  
Driver Manual  
(Supplement to the FieldServer Instruction Manual)  
FS-8700-115 General Purpose ASCII  
APPLICABILITY & EFFECTIVITY  
Effective for all systems manufactured after May 1, 2001  
Driver Version:  
1.00  
Document Revision: 4  
 
FS-8705-06 GPA (General Purpose ASCII) Manual  
Page 3 of 15  
1.  
GPA (General Purpose ASCII) Driver Description  
The serial GPA (General Purpose ASCII) Driver allows the FieldServer to accept data from  
remote devices which produce an ASCII byte stream. A typical example of such a device is an  
electronic scale producing an output similar to the one below.  
:weight 0.57 Kg Tare 44.3 Kg 1 2 3 4 -5 -6.7  
The driver waits passively for messages. When a message is received the driver converts each  
space delimited string of characters/numbers into a number. The numbers so formed are stored  
in consecutive elements of a Data Array. Referring to the example above, the driver will store  
the value .57 in the 1st element of the Data Array (DA), the value 44.3 in the next element, the  
value 1 in the next, the value 2 in the next etc.  
The driver can process negative numbers.  
This driver has significant limitations:  
Only one data stream per connection - if two different streams of string data are sent to the  
same port, the data from the one will overwrite data from the other.  
The driver can only process numbers that are presented in a simple numeric form.  
Hexadecimal, Exponent-mantissa and other complex forms cannot be processed.  
Max Nodes Supported  
FieldServer Mode  
Client  
Server  
Nodes  
1
Comments  
Only 1 node per port.  
The driver cannot serve data  
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com  
Tel: (408) 262-2299 Fax: (408) 262-9042 Toll_Free: 888-509-1970 email: [email protected]  
 
FS-8705-06 GPA (General Purpose ASCII) Manual  
Page 4 of 15  
2.  
Driver Scope of Supply  
2.1. Supplied by FieldServer Technologies for this driver  
FieldServer Technologies  
PART #  
Description  
FS-8915-10  
FS-8915-10  
FS-8917-02  
FS-8917-01  
UTP cable (7 foot) for Ethernet connection  
UTP cable (7 foot) for RS-232 use  
RJ45 to DB9F connector adapter  
RJ45 to DB25M connection adapter  
Driver Manual.  
FS-8705-96  
2.2.  
2.2.1.  
Provided by the Supplier of 3rd Party Equipment  
Required 3rd Party Hardware  
Part #  
Description  
None  
2.2.2.  
Required 3rd Party Configuration  
Consult your vendor documentation. It is not possible to provide direction here as this  
driver can be connected to a huge range of devices.  
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com  
Tel: (408) 262-2299 Fax: (408) 262-9042 Toll_Free: 888-509-1970 email: [email protected]  
 
FS-8705-06 GPA (General Purpose ASCII) Manual  
Page 5 of 15  
3.  
Hardware Connections  
The FieldServer is connected to the vendor device as shown in connection drawing.  
Configure the ASCII Passive Client according to manufacturer’s instructions  
Ethernet Network  
Connection via std networking  
interfaces such as hubs, switches,  
routers.  
Use 8917-02 or a 3 wire cable  
where you connect the remote  
device Xmit to RJ45-01, the remote  
Receive to RJ45-08 and, the gound  
wire to RJ45-04.  
ASCII Data  
Source  
Eg. Scale  
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com  
Tel: (408) 262-2299 Fax: (408) 262-9042 Toll_Free: 888-509-1970 email: [email protected]  
 
FS-8705-06 GPA (General Purpose ASCII) Manual  
Page 6 of 15  
4.  
Configuring the FieldServer as an GPA Driver 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 GPA (General Purpose ASCII) Driver Server.  
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 GPA (General Purpose ASCII) Driver  
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  
Up to 15 alphanumeric  
characters  
Data_Array_Name  
Provide name for Data Array  
Float, Bit, UInt16, SInt16,  
Provide data format. Each Data Packed_Bit,  
Byte,  
Data_Array_Format  
Data_Array_Length  
Array can only take on one format.  
Packed_Byte,  
Swapped_Byte  
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.  
1-10,000  
Example  
// Data Arrays  
Data_Arrays  
Data_Array_Name,  
DA_AI_01,  
DA_AO_01,  
DA_DI_01,  
Data_Array_Format,  
Data_Array_Length  
UInt16,  
UInt16,  
Bit,  
200  
200  
200  
200  
DA_DO_01,  
Bit,  
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com  
Tel: (408) 262-2299 Fax: (408) 262-9042 Toll_Free: 888-509-1970 email: [email protected]  
 
FS-8705-06 GPA (General Purpose ASCII) Manual  
Page 7 of 15  
4.2.  
Client Side Connection Descriptions  
Section Title  
Connections  
Column Title  
Function  
Specify which port the device is connected  
to the FieldServer  
Legal Values  
P1-P8, R1-R21  
Port  
Protocol  
Baud*  
Specify protocol used  
ASCII  
110  
baud rates only  
Even, Odd, None, Mark,  
Space  
115200, standard  
Specify baud rate  
Specify parity  
Parity*  
Data_Bits*  
Stop_Bits*  
Specify data bits  
Specify stop bits  
7, 8  
1
Handshaking* Specify hardware handshaking  
RTS, RTS/CTS, None  
Example  
//  
Client Side Connections  
Connections  
Port,  
P8,  
Protocol,  
ASCII,  
Baud,  
9600,  
Parity,  
None,  
1
Not all ports shown are necessarily supported by the hardware. Consult the appropriate Instruction  
manual for details of the ports available on specific hardware.  
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com  
Tel: (408) 262-2299 Fax: (408) 262-9042 Toll_Free: 888-509-1970 email: [email protected]  
 
FS-8705-06 GPA (General Purpose ASCII) Manual  
Page 8 of 15  
4.3.  
Client Side Node Descriptors  
Section Title  
Nodes  
Column Title  
Node_Name  
Function  
Provide name for node  
Legal Values  
Up to 32 alphanumeric characters  
This commonly used node  
descriptor parameter has no  
special meaning for this driver.  
Incoming messages could come  
from any node.  
Node_ID  
A Node_ID may be allocated and  
any value may be used  
Protocol  
Specify protocol used  
ASCII.  
Specify which port the device is  
connected to the FieldServer  
Connection  
P1-P8, R1-R22  
Example  
// Client Side Nodes  
Nodes  
Node_Name,  
PLC 1,  
Node_ID,  
1,  
Protocol,  
ASCII,  
Connection  
P8  
2
Not all ports shown are necessarily supported by the hardware. Consult the appropriate Instruction  
manual for details of the ports available on specific hardware.  
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com  
Tel: (408) 262-2299 Fax: (408) 262-9042 Toll_Free: 888-509-1970 email: [email protected]  
 
FS-8705-06 GPA (General Purpose ASCII) Manual  
Page 9 of 15  
4.4.  
4.4.1.  
Client Side Map Descriptors  
Column Title  
FieldServer Related Map Descriptor Parameters  
Function  
Legal Values  
Up  
to  
32  
Map_Descriptor_Name Name of this Map Descriptor  
alphanumeric  
characters  
One of the Data  
Name of Data Array where data is to be Array names from  
Data_Array_Name  
Data_Array_Offset  
stored in the FieldServer  
“Data  
Array”  
section above  
0
to  
maximum  
specified in “Data  
Starting location in Data Array  
Array”  
above  
section  
Function of Client Map Descriptor.  
Refer to the FieldServer configuration  
information for more information. Note  
that passive client means that the map  
descriptor owns the Data Array  
elements and no other active Map  
Descriptor can address the same data.  
Function  
Server, passive  
4.4.2.  
Driver Related Map Descriptor Parameters  
Function  
Column  
Title  
Legal Values  
One of the node names  
specified in “Client Node  
Descriptor” above  
Node_Name Name of Node to fetch data from  
Data type  
Your choice affects how data is stored.  
Ana_Input , Ana_Output ,  
If you use a Digital type then data is  
Data_Type  
Register  
, Float_Reg ,  
stored only as 1’s or Zero’s. If you use  
non Float types the values are truncated.  
Thus 0.6 is stored as zero.  
Dig_Input , Dig_Output  
Length of Map Descriptor  
Specifies the maximum number of string  
items that can be converted to numbers  
Length  
and stored.  
1,2,3…  
Other than ‘using up’ point count, there is  
no danger in setting the length to a larger  
number than required.  
This commonly used parameter is not  
used by this driver.  
Address  
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com  
Tel: (408) 262-2299 Fax: (408) 262-9042 Toll_Free: 888-509-1970 email: [email protected]  
 
FS-8705-06 GPA (General Purpose ASCII) Manual  
Page 10 of 15  
4.5.  
Map Descriptor Example.  
In this example, we provide a map descriptor to capture data from a scale and store it in a Data Array called ‘DA_Scale’. The 1st  
element converted from the ASCII steam will be store at offset zero in the Data Array. The driver will convert and store floating point  
numbers because the data_type is a floating point type. A maximum of 10 number fields can be processed and stored. The driver  
only converts and stores the data when the ASCII stream ends. Read appendix xxxxxx to learn how the driver knows when a stream  
has ended and it should process and strore data.  
Map_Descriptors  
Map_Descriptor_Name,  
Store_Weights,  
Data_Array_Name,  
DA_Scale,  
Data_Array_Offset,  
0,  
Function,  
Passive,  
Node_name  
Node_A,  
Data_Type  
Float-Reg  
Length  
10,  
Driver waits passively  
for incoming data.  
There is no polling.  
Connects this Map  
Descriptor to a Node  
Descriptor which in  
A maximum of  
10 value items  
will be stored.  
The name of the  
Data Array where  
the incoming data  
should be stored.  
Map  
Descriptor  
Names do not  
need to be unique  
but making them  
so may facilitate  
trouble shooting.  
turn points to  
a
When the driver processes the  
stream it should (in this case) treat  
the data as floating point data.  
Ensure that the format of the Data is  
suitable to store a floating point  
value  
connection descriptor.  
The 1st element of  
converted data will be  
stored at this location  
in the DA. Subsequent  
data is stored in  
consecutive locations.  
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com  
Tel: (408) 262-2299 Fax: (408) 262-9042 Toll_Free: 888-509-1970 email: [email protected]  
 
FS-8705-06 GPA (General Purpose ASCII) Manual  
Page 11 of 15  
5.  
Configuring the FieldServer as a GPA Driver Server  
Driver cannot be used to serve data. Contact the Sales group at FST if you are interested in  
this functionality.  
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com  
Tel: (408) 262-2299 Fax: (408) 262-9042 Toll_Free: 888-509-1970 email: [email protected]  
 
FS-8705-06 GPA (General Purpose ASCII) Manual  
Page 12 of 15  
Appendix A. Advanced Topics  
Appendix A.1. Separating Data Streams.  
The driver processes the ASCII stream and stores the converted data when the stream  
ends. By default the driver closes the stream when it receives the CR character (Hex code  
= 0x0d Decimal code = 13).  
The default end of stream character can be changed using the registry.  
The example below is an extract from registry.ini. The Registry group is for port P1. Similar  
groups can exist for other ports and a group may have more settings than those shown  
below. If you wished to change the end of stream character to a NEW LINE character  
(Hex=0x0a Decimal=10) then change the 13’s to 10’s in the example below. The default_  
value is used by the registry when it receives a ‘restore defaults’ command.  
[FieldServer_P1]  
Termination_Char = 13  
default_Termination_Char = 13  
Appendix A.2. Interaction with the WebServer Driver  
This driver is specially configured to watch for registry changes that are initiated from the  
WebServer driver. It is possible to configure the connection settings of the port without  
changing the configuration file as follows:  
Create web pages to change the registry settings.  
Browse to the web page.  
Change a setting.  
When the WebServer sees that the new settings have been updated it sets a signal for  
the ASCII driver to use the new settings.  
The html fragment below can be inserted in a Web Page. It will allow a user via a browser to  
change the connection settings for P1.  
<FST_COMBO  
Reg_name  
=
"FieldServer_P1:Baud"  
List_Items="300;600;1200;2400;4800;9600;19200;38400;115200;">  
<FST_TEXT Reg_name = "FieldServer_P1:Data_Bits" >  
<FST_TEXT Reg_name = "FieldServer_P1:Stop_Bits" >  
<FST_TEXT Reg_name = "FieldServer_P1:Parity" >  
You can add a similar field for any parameter in the registry file but note that only some  
registry settings are used by this driver and only some drivers (including this one) are  
designed to be notified of a change and will work with the changed data.  
Using this interface you can deliver a system which a customer can simply use to adjust the  
connection settings without learning how to configure a FieldServer. Ensure that registry.ini  
is installed on the FieldServer.  
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com  
Tel: (408) 262-2299 Fax: (408) 262-9042 Toll_Free: 888-509-1970 email: [email protected]  
 
FS-8705-06 GPA (General Purpose ASCII) Manual  
Page 13 of 15  
Appendix B. Troubleshooting tips  
Appendix B.1. Timeouts  
If the end of stream character has not been received in the default timeout period of 0.5  
seconds the driver clears the incoming buffer and waits for the beginning of the next stream.  
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com  
Tel: (408) 262-2299 Fax: (408) 262-9042 Toll_Free: 888-509-1970 email: [email protected]  
 
FS-8705-06 GPA (General Purpose ASCII) Manual  
Appendix C. Driver Error Messages  
Page 14 of 15  
Error  
Description and Corrective Action  
ASCII:#1  
\"%s\"  
FYI.  
Port  
Connection You can safely ignore this message. It is designed to make you  
Parameters Can Be aware of the capability of the driver. Refer to Appendix A.2  
Changed Remotely  
You can safely ignore this message if the setting reported match  
ASCII:#2a/b FYI. Port  
your expectations. The driver is reporting that connection settings  
\"%s\" Setting Changed  
have been changed. The change resulted from a change to the  
Remotely. New Setting:  
FieldServer registry settings and this driver has been notified to start  
%s  
working with the new settings.  
ASCII:#3a/b FYI. Port  
The driver is reporting initial settings for port. The message is for  
\"%s\" Initial Setting:%s  
your information only and no corrective action is required if it  
Start Char 0x%2X  
confirms you expectations. If it doesn’t review and correct the  
configuration file or registry.ini file.  
End  
Char  
0x%02X  
Termination Time %fs  
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com  
Tel: (408) 262-2299 Fax: (408) 262-9042 Toll_Free: 888-509-1970 email: [email protected]  
 
FS-8705-06 GPA (General Purpose ASCII) Manual  
Page 15 of 15  
THIS PAGE INTENTIONALLY LEFT BLANK  
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com  
Tel: (408) 262-2299 Fax: (408) 262-9042 Toll_Free: 888-509-1970 email: [email protected]  
 

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