Instruction manual | FieldServer FS-8700-66 Computer Drive User Manual

A Sierra Monitor Company
Driver Manual
(Supplement to the FieldServer Instruction Manual)
FS-8700-66 GE SNP
APPLICABILITY & EFFECTIVITY
Effective for all systems manufactured after May 1, 2001
Driver Version:
1.02
Document Revision: 9
FS-8700-66_GE-SNP Manual
Table of Contents
TABLE OF CONTENTS
1.
GE_SNP Description ...................................................................................................... 3
2.
2.1.
Driver Scope of Supply .................................................................................................. 4
Supplied by FieldServer Technologies for this driver.................................................. 4
3.
Hardware Connections .................................................................................................. 5
4.
Configuring the FieldServer as a GE_SNP Client ........................................................ 8
4.1.
Data Arrays/Descriptors ............................................................................................. 8
4.2.
Client Side Connection Descriptors............................................................................ 9
4.3.
Client Side Node Descriptors ....................................................................................10
4.4.
Client Side Map Descriptors......................................................................................10
4.4.1. FieldServer Related Map Descriptor Parameters ...................................................10
4.4.2. Driver Related Map Descriptor Parameters............................................................11
4.4.3. Timing Parameters ................................................................................................11
4.4.4. Map Descriptor Example 1 – Simple Read.............................................................12
4.4.5. Map Descriptor Example 2 – Simple Write.............................................................12
4.4.6. Map Descriptor Example 3 – Handling Bits ............................................................13
5.
Configuring the FieldServer as a GE_SNP Server ......................................................14
5.1.
Server Side Connection Descriptors .........................................................................14
5.2.
Server Side Node Descriptors...................................................................................15
5.3.
Server Side Map Descriptors ....................................................................................16
5.3.1. FieldServer Specific Map Descriptor Parameters...................................................16
5.3.2. Driver Specific Map Descriptor Parameters ...........................................................16
5.3.3. Timing Parameters ................................................................................................17
5.3.4. Map Descriptor Example........................................................................................18
Appendix A.
Troubleshooting Tips....................................................................................19
Appendix B. Error Messages .............................................................................................20
Appendix B.1. Driver Stats ..................................................................................................22
Appendix C. Advanced Topics...........................................................................................25
Appendix C.1. SNP Node Names .......................................................................................25
Appendix C.2. Scaling.........................................................................................................26
Appendix C.3. Server Response NAK, Major and Minor Error Codes .................................26
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 3 of 29FS-8700-66_GE-SNP Manual
1.
Page 3 of 29
GE_SNP Description
The GE-SNP Serial driver allows the FieldServer to transfer data to and from devices over
either RS-232 or RS-485 using GE-SNP Serial protocol. The FieldServer can emulate either a
Server or Client.
The FieldServer provides functions to read and write PLC memory and change the privilege
level. Standard SNP mailbox messages are used. The driver does not support Datagram
messages and cannot parse them. These messages are defined by the SNP protocol to allow
multiple data types to be packed into one message. They are not commonly used by the HMI
and 3rd party applications and are inconsistent with the FieldServer’s Write Through and Port
Expander capabilities.
The driver can expose communications statistics in a Data Array so that downstream devices
can monitor them.
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 4 of 29FS-8700-66_GE-SNP Manual
2.
Page 4 of 29
Driver Scope of Supply
2.1.
Supplied by FieldServer Technologies for this driver
FieldServer Technologies
PART #
FS-8915-10
FS-8917-03
FS-8700-66
Description
UTP cable (7 foot) for RS-232 use
RJ45 to DB9M connector adapter
Driver Manual.
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 5 of 29FS-8700-66_GE-SNP Manual
3.
Page 5 of 29
Hardware Connections
The FieldServer is connected to the GE PLC in one of two ways.
Almost every GE PLC has a RS-232 and RS-485 port.
illustrated below.
Possible cable configurations are
A converter is required to connect between RS-232 and RS-485. An example of connection
configurations for the Model480TLED connector is depicted overleaf. Any equivalent connector
can be used.
Cable 1
RS-485 port
RS-485 port
15 pin female
FieldServer
GE-PLC
Ca
b le
ble
Ca
RS-232 port
3
4
RS-232 port
RJ11
Cable 2
Cable 1
Pin 1 at bottom
GE
FieldServer
Tx
Rx
+
+
10 +
-
13 -
Tx
11 12 +
Gnd
7
Rx
Gnd
Cable 2
FieldServer
GE
Tx
Rx
Gnd
-
5 Rx
2 Tx
3
Gnd
4
*
GE SNP
CONNECTION DIAGRAM
1 CTS
6 RTS
BASE NAME:
FILE NAME:
DATE: 2/2/04
BY:
MF
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 6 of 29FS-8700-66_GE-SNP Manual
Page 6 of 29
RS- 232 TO RS-422/ 485
OPTICALLY ISOLATED
CONVERTER
3
4
5
7
7
Recceive
Transmit
B& B electronics
1
2
3
4
5
6
7
SD
RTS
3
O
N
SR-422/485
2
RS-232
FS-8917-01
2
8
TB1
TDA(-)
TDB(+)
RDA(-)
RDB(+)
422/ 485 GND
MODEL485 OTLED
TB2
+12V
R-232
GND
J2
DB25F
21787
TDA(-)
TDB (+)
RDB(+)
RDA(-)
GND
JP1
4800
9600
19.2K
38.4K
ECHO
4W/2W
4W/2W
TERM.
Remote Serial
Device– 4 wire
Remote Serial
Device– 2 wire
91035
+ (B)
- (A)
GND
From FieldServer
RS-232 Device
3
Tx
RTS
5
RTS
3
4
GND
GND
7
Recceive
Transmit
O
N
B&B electronics
MODEL 485OTLED
7
J2
2
3
4
5
6
7
TDA(-)
TDB(+)
RDA(-)
RDB(+)
422/485
GND
8
TB1
TB2
+12V
R-232
GND
DB25F
Note: Pins 4&5 and pins 6,8&20 are
bridged internally to allow for RS-232
devices that need hardware control.
1
SD
RTS
Tx
RS-232 TO RS-422/485
OPTICALLY ISOLATED
CONVERTER
2
RS-232
2
SR-422/485
Rx
Rx
JP1
4800
9600
19.2K
38.4K
ECHO
4W/2W
4W/2W
TERM.
Converter for Cable 3: From RS-232 on FieldServer to RS-485 on device.
FieldServer
91035
R1 or R2
+ (B)
- (A)
GND
Converter for Cable 4: From RS-485 on FieldServer to RS-323 on device.
GE SNP
CONNECTION DIAGRAM
RS-485 to RS-232 using
Model4850 TLED connector.
BASE NAME:
FILE NAME:
FS-8700-66-1
DATE:
2/16/08
BY:
MC
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 7 of 29FS-8700-66_GE-SNP Manual
Page 7 of 29
RJ45
Ethernet cable segment
black
yellow
blue
white
green
6
7
2
3
5
Horner
232
to
422
9 pin
black
yellow
blue
white
green
5 3 2 7 6
RJ45
9 pin
9 pin
5 3 2
9 pin
15 pin
CPU or 2ndary port
25 pin
PLC
null modem
Pri or 2ndary port
15 pin
9 pin
9 pin
Com1
9 pin
PC
black
yellow
blue
white
green
3
2
5
Horner
232
to
422
GE LOGICMASTER
PC Software to PLC
RJ45
Typical
FieldServer
Cable
(408)-262-2299
RJ45
P1-P8
GE SNP
CONNECTION DIAGRAM
BASE NAME:
FILE NAME:
DATE: 2/2/04
BY:
MF
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 8 of 29FS-8700-66_GE-SNP Manual
4.
Page 8 of 29
Configuring the FieldServer as a GE_SNP 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 GE_SNP 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 GE_SNP 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
Data_Array_Name Provide name for Data Array
characters
Float, Bit, UInt16, SInt16,
Provide data format. Each Data Array Packed_Bit,
Byte,
Data_Array_Format
Packed_Byte,
can only take on one format.
Swapped_Byte
Number of Data Objects. Must be
larger than the data storage area
Data_Array_Length
1-10,000
required by the Map Descriptors for
the data being placed in this array.
Example
// Data Arrays
Data_Arrays
Data_Array_Name,
DA_AI_01,
DA_AO_01,
DA_DI_01,
DA_DO_01,
Data_Format,
UInt16,
UInt16,
Bit,
Bit,
Data_Array_Length
200
200
200
200
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 9 of 29FS-8700-66_GE-SNP Manual
4.2.
Page 9 of 29
Client Side Connection Descriptors
Section Title
Connections
Column Title
Function
Legal Values
Specify which port the device is
Port
P1-P8, R1-R21
connected to the FieldServer
Protocol
Specify protocol used
SNP
110 – 19200, standard baud rates
Baud*
Specify baud rate
only (Vendor limitation), 19200
Even, Odd, None, Mark, Space
Parity*
Specify parity
7, 8
Data_Bits*
Specify data bits
1
Stop_Bits*
Specify stop bits
None
Handshaking* Hnadshaking is not supported
0-32000 seconds, 1 second
Poll _Delay*
Time between internal polls
The timeout specified for the connection is used as the data link layer
Timeout
timeout. It is also used as the timeout for each Map Descriptor if a timeout
is not explicitly defined for a Map Descriptor.
Example
//
Client Side Connections
Connections
Port,
Protocol,
P1,
SNP,
Baud,
19200,
Parity,
Odd,
Handshaking,
None,
Poll_Delay
0.100s
GE Port Defaults
Baud
Data Bits
Parity
Stop Bits
Max Link Idle Time
Series 90-30 PLC’s
19,200
8
Odd
1
10 Secs
Series 90-70 PLC’s
19,200
8
Odd
1
5 Secs
GE Port Capabilities
Baud
Data Bits
Parity
Stop Bits
Max Link Idle Time
300, 600, 1200, 2400, 4800, 9600, 19200
8
Odd, Even, None
1, 2
1 to 60 Secs
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) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 10 of 29FS-8700-66_GE-SNP Manual
4.3.
Page 10 of 29
Client Side Node Descriptors
Section Title
Nodes
Column Title
Node_Name
Node_ID
Protocol
Port
Function
Legal Values
Provide name for Node. The driver
uses the Node name to establish a
connection with the Server if the
Node_ID is non-zero.
If the Node_ID is zero then the driver
ignores the Node name when logging
onto the PLC and logs on using a
Null name. Thus by setting the
Node_ID to zero you can allow the
driver to log onto a Node whose
name is not known.
The parameter is used to control how
the driver logs onto the PLC. Read
the notes above (Node_Name)
Specify protocol used
Specify which port the device is
connected to the FieldServer
Up
to
32
characters
alphanumeric
0,1
SNP
P1-P8, R1-R22
Example
// Client Side Nodes
Nodes
Node_Name,
Node_ID,
PLC 1,
1,
4.4.
Protocol,
SNP,
Port
P8
Client Side Map Descriptors
4.4.1.
FieldServer Related Map Descriptor Parameters
Column Title
Function
Legal Values
Up to 32 alphanumeric
Map_Descriptor_Name Name of this Map Descriptor
characters
Name of Data Array where One of the Data Array names
Data_Array_Name
data is to be stored in the from “Data Array” section
FieldServer
above
0 to maximum specified in
Data_Array_Offset
Starting location in Data Array
“Data Array” section above
Function of Client Map
Function
RDBC, WRBC, WRBX
Descriptor
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) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 11 of 29FS-8700-66_GE-SNP Manual
4.4.2.
Driver Related Map Descriptor Parameters
Column
Title
Function
Node_Name
Name of Node to fetch data from
Data_Type
Data type
Length
Address
Format*
GE_Func*
Page 11 of 29
Length of Map Descriptor. Ensure that the
length does not exceed the table in the PLC
Starting address of read block / write block. The
1st element of each Data type Table is referred
to as address one.
Use to override the default format for obtaining
data. Bit tables are by default read by reading
whole bytes at a time (If the Length is 10 then
10 bytes of data are read and placed in 10 Data
Array locations)
Legal Values
One of the Node
names specified in
“Client
Node
Descriptor” above
Discrete Inputs (%I)
Discrete Outputs (%Q)
Discrete Temporaries
(%T)
Discrete
Internals
(%M)
Genius Global Data
(%G)
Analog Inputs (%AI)
Analog
Outputs
(%AQ)
Registers (%R)
%SA Discrete
%SB Discrete
%SC Discrete
%S Discrete (%S)
1-1000
1,2,3
Positive
numbers
whole
Bit, Byte
The format for %AI,
%AQ and %R cannot
If you wish to read bits instead then use this be changed.
parameter. (If the Length is 10 then 10 bits are
read and each bit is stored in its own location.)
This parameter is only specified when you
create a write Map Descriptor to change the
privilege level.
CPL, RW
If it is not specified the driver assumes the
default (RW – Read/Write).
4.4.3.
Timing Parameters
Column Title
Scan_Interval
Function
Rate at which data is polled
Legal Values
≥0.1s
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Map Descriptor Example 1 – Simple Read
Page 12 of 29
Map Descriptor Example 2 – Simple Write
RDBC = read block
continuous. The driver
will read data from the
PLC continuously.
Address
1,
Length
10,
Data_Type
%1
Use the % symbol
as you would if you
were programming a
GE PLC.
Read will be
performed every
2.0s.
Scan_Interval,
2.0,
The address and length
specify the first element
and the number of
elements that must be
read from the PLC’s
data tables. GE PLC’s
reference data tables
starting at element 1.
Unless
otherwise
specified, the driver
reads bytes and words.
This Map Descriptor
reads bytes of data
covering %I1 to %I79
Node_Name
PLC-1,
The Node must
have
been
defined in the
Nodes section of
the CSV file.
The Node Name
connects
this
Map Descriptor
to a Node which
in turn connects
the
Map
Descriptor to a
port.
Function,
RDBC,
Data_Array_Name,
DA_AO,
Function,
WRBC,
Node_Name
Node1,
Address
20,
Length
10,
Write to PLC Table element number 20 to
29 inclusive (10 elements)
Data_Array_Offset,
0,
Data_Type
%AQ
Write to the %AQ
(Analog
Output)
table in the PLC.
Scan_Interval,
5.0,
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Write continuously
Map_Descriptor_Name,
Write_AO,
This example writes data from the FieldServer Data Array called DA_AO to the PLC identified as NODE1. The write is repeated
every 5 seconds. Ten word values are written to the PLC’s %AQ Data Table starting at location 20.
4.4.5.
The name of the Data Array
in which the driver will store
the data. The name must
correspond to a Data Array
defined in the Data Array
section of the CSV file
Data_Array_Offset,
100,
Location in the Data
Array where the first
element of data will be
stored. The arrays are
zero referenced so an
offset of 100 indicates
st
the 101 element of the
array.
Data_Array_Name,
DA_D1,
Map Descriptor names
may be used in driver
error messages. It is not
essential, but it is useful
to use unique names.
Map_Descriptor_Name,
Read D1,
This example provides a Map Descriptor to read 10 bytes of Discrete Input states, starting at the very first Discrete Input. The data is
stored in a Data Array called DA_DI and the first input is stored at location 100 in the array (101st element). The PLC is polled every 2
seconds
4.4.4.
Page 12 of 29FS-8700-66_GE-SNP Manual
Map Descriptor Example 3 – Handling Bits
Page 13 of 29
Data_Array_Name,
DA_T,
Function,
RDBC,
Node_Name,
PLC-1,
Address,
8,
Length,
2,
Scan_Interval,
2.0,
The format parameter tells the driver to override the default
data type and read bits specifically. In this case the bits
are stored in the Data Array in two separate elements at
DA_T[100] and DA_T[101]
Data_Array_Offset,
100,
Data_Type,
%T,
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Map_Descriptor_Name,
Read_DI,,
Format
Bit
This example writes data from the FieldServer Data Array called DA_AO to the PLC identified as NODE1. The write is repeated
every 5 seconds. Ten word values are written to the PLC’s %AQ Data Table starting at location 20.
4.4.6.
Page 13 of 29FS-8700-66_GE-SNP Manual
Page 14 of 29FS-8700-66_GE-SNP Manual
5.
Page 14 of 29
Configuring the FieldServer as a GE_SNP Server
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” files
provided with the FieldServer).
This section documents and describes the parameters necessary for configuring the FieldServer
to communicate with a GE_SNP Client.
The configuration file tells the FieldServer about its interfaces, and the routing of data required.
In order to enable the FieldServer for GE_SNP communications, the driver independent
FieldServer buffers need to be declared in the “Data Arrays” section, the FieldServer virtual
Node(s) needs to be declared in the “Server Side Nodes” section, and the data to be provided to
the Clients needs to be mapped in the “Server 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.
5.1.
Server Side Connection Descriptors
Section Title
Connections
Column Title
Protocol
Function
Specify which port the device is
connected to the FieldServer
Specify protocol used
Baud*
Specify baud rate
Parity*
Specify parity
Data_Bits*
Stop_Bits*
Handshaking*
Poll Delay
Specify data bits
Specify stop bits
Specify hardware handshaking
Time between internal polls.
Port
Legal Values
P1-P8, R1-R23
SNP
110 – 115200, standard
baud rates only
Even, Odd, None, Mark,
Space
7, 8
1
RTS, RTS/CTS, None
0-3200s, 1s
Example
//
Server Side Connections
Connections
Port,
P1,
Protocol,
SNP,
Baud,
19200,
Parity,
Odd,
Handshaking
None
3
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) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 15 of 29FS-8700-66_GE-SNP Manual
5.2.
Page 15 of 29
Server Side Node Descriptors
Section Title
Nodes
Column Title
Node_Name
Node_ID
Protocol
Server_Hold_Timeout*
Function
Legal Values
The Node name is used
differently in a Server Node
Provide name for Node. The
driver uses the Node name to
establish a connection with the Up to 32 alphanumeric
Server if the Node_ID is non- characters
zero.
See Section 6.3 for additional
information.
The parameter is used to
control how the driver logs onto
0,1
the PLC. Read the notes above
(Node_Name)
Specify protocol used
SNP.
In a number of FieldServer
configurations it is common to
omit the port when defining a
Server Node this cannot be
done with the SNP protocol P1-P8, R1-R24
unless the FieldServer is to be
used to emulate only one Node
and is not polling any other
SNP devices.
Example
//
Server Side Nodes
Nodes
Node_Name,
PLC 1,
Node_ID,
1,
Protocol,
SNP,
Port
P8
4
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) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 16 of 29FS-8700-66_GE-SNP Manual
5.3.
Page 16 of 29
Server Side Map Descriptors
5.3.1.
FieldServer Specific Map Descriptor Parameters
Column Title
Function
Map_Descriptor_Name
Name of this Map Descriptor
Data_Array_Name
Name of Data Array where data
is to be stored in the FieldServer
Data_Array_Offset
Starting location in Data Array
Function
Function
Descriptor
5.3.2.
of
Server
Map
Legal Values
Up
to
32
alphanumeric
characters
One of the Data Array names
from “Data Array” section above
0 to maximum specified in “Data
Array” section above
Server
Driver Specific Map Descriptor Parameters
Column Title
Node_Name
Function
Name of Node to fetch data
from
Data type
Data_Type
Use one of the Data Types
specified in brackets.
Legal Values
One of the Node names
specified in “Client Node
Descriptor” above
Discrete Inputs (%I)
Discrete Outputs (%Q)
Discrete Temporaries (%T)
Discrete Internals (%M)
Genius Global Data (%G)
Analog Inputs (%AI)
Analog Outputs (%AQ)
Registers (%R)
%SA Discrete
%SB Discrete
%SC Discrete
%S Discrete (%S)
Length of Map Descriptor
Length
Ensure that the length does
not exceed the table length in
the PLC.
Starting address of read block
/ write block
Address
The 1 element of each Data
type Table is referred to as
address one.
st
1 - 1000
1,2,3
Positive whole numbers
Has no meaning on the Server
as the driver responds based
on the nature of the request
Format
If the Client requests byte data
then the one byte is obtained
from each array element. If the
Client requests bits then one
bit state is obtained from each
array element.
N/A
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 17 of 29FS-8700-66_GE-SNP Manual
5.3.3.
Page 17 of 29
Timing Parameters
Column Title
Function
Scada_Hold_Timeout
Specifies time Server side waits before responding to
Client that Node is offline on FieldServer Client side.
Legal
Values
>1.0s
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Address1 corresponds
st
to offset 0 (1 location)
in the array. If Client
reads %R15 then driver
responds with data from
element 14 of the array.
This is a Server. It
responds to polls but
does no active work
itself.
Node_Name,
PLC-1,
Address,
1,
This Map Descriptor can be
used to respond to a poll
that reads and writes to
addresses 1 to 1000. If a
poll attempts to read data at
address 1001, then if no
other Map Descriptor covers
that address space, a “no
datas” response will be sent.
Function,
Passive,
Page 18 of 29
Length,
1000,
Data_Type
%R
This Map Descriptor will
be used to process
Client read/writes of
Register (%R) data.
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Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
If the Client is reading
then response data will
be obtained from this
table. If the Client is
writing, incoming data
will be stored in this
array
Data_Array_Name,
TABLE_R,
Map_Descriptor_Name,
Server-R-Data,
Data_Array_Offset,
0,
Map Descriptor Example.
5.3.4.
Page 18 of 29FS-8700-66_GE-SNP Manual
Page 19 of 29FS-8700-66_GE-SNP Manual
Page 19 of 29
Appendix A. Troubleshooting Tips
•
•
•
Every 2nd message Times Out A possible cause is that the poll frequency is so low that
the time between polls is greater than the Max Link Idle Time (of the PLC). If the time is
exceeded the connection is closed. Thus when the next poll is received by the PLC it
ignores it and hence it times out in the FieldServer. After timing out, the driver re-establishes
the connection for the next poll.
Very slow Comms Rate A timer known as the T1 timer is the minimum time that must pass
before a response to a message can be sent. Both ends of a SNP connection have their
own T1 timer (hard coded in the driver). When a connection is made the timers are
exchanged and the larger of the two is used. The drivers T1 timer is set to a very small
number. SNP message #6 indicates the size of the T1 timer. You may need to configure the
PLC to improve communications.
Multidrop RS-485 networks.
SNP protocol specifies that their may only be one master
on a network at a time. When using nameless Nodes (Node_id=0) there may be one and
only one PLC on the connection.
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 20 of 29FS-8700-66_GE-SNP Manual
Page 20 of 29
Appendix B. Error Messages
Message
SNP:#1 FYI. The MapDesc called
<%s> is too short.
SNP:#2 FYI. You could have
used a MapDesc called <%s> to
expose diagnostic info.
SNP:#3 FYI. SNP device requires
inter msg timer < timeout.
Nid=<%s>.
SNP:#4 Error.
Node=<%s>
Cant
SNP:#5
Err.
Total
expected/rcvd=%d/%d
emulate
bytes
SNP:#6 FYI. T1 timer set to
<%ld> mSec.
SNP:#7 FYI. T1 timer reset to
<%ld> mSec.
SNP:8 FYI. Subsequent connect
response ignored. NName=<%s>
SNP:9 Err. Device declined
request. Mjr=%x(h) Min=%x(h)
Possible Offending Poll =<%s>
addr=%d length=%d
SNP:10
Err.
Wrong
type=%d(h) mbox=%x(h)
5
msg
Explanation
The length of the Map Descriptor defined to expose driver
statistics must be at least 660.5
You may safely ignore this message. Read Appendix B.1
for information on how to expose the driver’s
communication statistics using a Data Array.
The driver is required to use the larger of its own or the
PLC’s T1 (Inter message) timer. This message is
produced when the PLC returns a T1 timer that is larger
than the driver’s timeout. Using this timer will mean that
every message will timeout. Increase the timeout for the
Node, connection or Map Descriptor as appropriate.5
A connection request has been received for the Node
named in the error message but this Node has not been
defined in the CSV file. The connection has not been
established.5
This could result from a corrupted message or it may
indicate an unexpected/unsupported aspect of the SNP
protocol. If the message occurs frequently, take a log and
report the error to FieldServer.
This message requires no action. It reports the T1 timer
value selected by the slave in milliseconds. If the value is
large then this will slow the communications rate and you
may wish to reconfigure the slave.
This is the FieldServer slave reporting its T1 timer after a
Client has established a connection No action is required.
No action is required. A Client has attempted to reestablish a connection that is already open.
This message uses two lines of the error log. It is printed
when a slave declines a request. The major and minor
faults are reported. These numbers are printed in
hexadecimal. See Appendix C.3 for further details. The
message reports the Map Descriptor which generated the
rejected poll, the data type, the address and the number of
elements being requested. Often this message will be the
result of a poll that requests data past the end of a PLC
data table or when the length is based on a bit count but
the poll actually requests bytes.5
This message is reported when the driver receives an
unexpected SNP message. Record this information, take
a log and report the error to FieldServer.
Edit the CSV, correct the problem and reset the FieldServer
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 21 of 29FS-8700-66_GE-SNP Manual
Message
SNP:11 Err. Max Tbuf Len.
FieldServer cant go bigger than
%d bytes
Possible Offending Poll =<%s>
addr=%d length=%d
SNP:12 FYI. Max Tbuf Len.
FieldServer != Device. Changed
FieldServer to %d bytes
SNP:13
Err.
Wrong
type=%d(h) mbox=%x(h)
msg
SNP:#14 Error. Attach Response.
Unexpected !
SNP:#15 FYI. Node Station forcing to 0
SNP:#16 Err. Addresses start at
1. MapDesc=<%s>
SNP:#17 Err. MapDesc=<%s>
has bad data type.
SNP:#18 Err. MapDesc=<%s>
has bad data type.
SNP:#19 Err. Mapdesc=<%s>
has invalid length.
SNP:#20 Err. do diagnostic x
SNP:#21 Err. do diagnostic x
SNP:#22 Err. do diagnostic x
Page 21 of 29
Explanation
The length of some messages is variable and is
dependent on settings or the particular implementation of
the SNP. Normally this driver adjusts to use the largest
size required by a Client or slave response but this
message indicates that the driver’s maximum had been
reached. The data has been discarded so it is important
that the situation be remedied. The data type, address and
the number of elements being requested are reported.
Two possible solutions exist.
Change the Client’s communications configuration and
reduce the size of the text buffer length to 4096 bytes.
Create two Map Descriptors that each read half the data.
This message requires no response. It indicates that the
slave requires a longer text buffer than the driver’s default.
The driver has adjusted its buffer to the new length
indicated.
The driver has received an unexpected reply in response
to a poll. Make a log, record the values reported in this
message and contact FieldServer for support.
The driver has been polled by a Client and it has received
an unexpected message. If the error occurs repeatedly
then make a log, record the values reported in this
message and contact FieldServer for support. There are a
few variations of this message but they all indicate the
same problem.
The Node_ID has not been defined for a SNP Node. Read
the notes in Appendix B.1 and in sections 4.3 and 5.2. 6
GE devices number the elements of data tables starting at
element 1.6
Refer to section 4.4.2 for a list of valid data types.6
A Map Descriptor must have a length. The minimum
length is “1”. 6
If you see this error, report it to FieldServer tech support.
The message is produced when a QA diagnostic is
produced and should only ever be seen during testing by
FieldServer Inc.
SNP:#23 Err. Illegal Node_ID
Legal Node_ID’s are 0-65535.6
[%d] - Set to 1
The CPU Id is a max 10 characters including the
terminating Null character. The driver has found one that
GE_SNP:#24 FYI. Parse Error:
isn’t correctly formatted. This error may be ignored. It will
Attach: CPU ID is not Null
not affect operation of the driver. It does mean the driver
terminated.
cannot store the name of the connected device in the stats
array.
6
Edit the CSV, correct the problem and reset the FieldServer
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 22 of 29FS-8700-66_GE-SNP Manual
Page 22 of 29
Appendix B.1. Driver Stats
The statistics recorded by the GE-SNP Serial Driver are slightly different from the way that
FieldServer driver normally records statistics. This difference arises from the fact that this
driver is not a simple poll response driver. Bear in mind that a single poll can generate a
large number of response fragments.
Fragment Ack/nack messages are NOT counted as messages but the bytes sent/rcvd are
counted.
Connection messages are counted as messages and the bytes sent/rcvd are counted.
This driver can expose these and additional statistics by writing data to a Data Array.
A special Map Descriptor is required. The driver recognizes the Map Descriptor by its name
which must be "SNP-stats”.
Example: Configuration of this special Map Descriptor
Nodes
Node_Name,
Null_Node,
Protocol
SNP
Data_Arrays
Data_Array_Name,
SNP_STATS
,
Data_Format,
UINT32
,
Map_Descriptors
Map_Descriptor_Name, Data_Array_Name,
snp-stats
,
SNP_STATS
,
Data_Array_Length
660
Node_Name,
Null_Node ,
Length
660
When the driver sees this Map Descriptor it uses the Data Array SNP_STATS (in this
example) to store driver specific statistics. Only one of these Map Descriptors may be
specified (per tier) per FieldServer.
The driver stores the following stats for each port.. The offset into the Data Array can be
found by multiplying the port number by 60
No Message
0 GE_STAT_CPU_ID
11 GE_STAT_T1_TIMER
12
13
14
15
16
GE_STAT_MBOX_NAK_MAJOR
GE_STAT_MBOX_NAK_MINOR
GE_STAT_MBOX_NAK_CNT
GE_STAT_MBOX_PROG_NUM
GE_STAT_MBOX_SWEEP
Description
This is 10 bytes long. The numbers placed
here correspond to the ASCII characters of
the responding Node's name.
The current value of the T1 timer is
reported here. The driver uses the larger of
its own and the slave T1 Timer.
Most recent Mailbox Nak error code. See
additional table below
Mailbox Nak error Count
Most recent Piggyback info
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
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Page 23 of 29FS-8700-66_GE-SNP Manual
No Message
Page 23 of 29
Description
17 GE_STAT_MBOX_PLC_STAT
18 GE_STAT_MBOX_PRIV_LVL
19 GE_STAT_NO_NODES
20 GE_STAT_CONNECT_ATTEMPT
21 GE_STAT_CONNECT_RESPONSE
22 GE_STAT_CONNECT_NO_RESPONSE
23 DRV_DLL_CLIENT_SENDS_MSG
24 DRV_DLL_CLIENT_SENDS_ACKNAK
25 DRV_DLL_CLIENT_SENDS_BYTES
26 DRV_DLL_SERVER_SENDS_MSG
27 DRV_DLL_SERVER_SENDS_ACKNAK
28 DRV_DLL_SERVER_SENDS_BYTES
If a poll for a SNP Node is received and
there are no Nodes defined or there is no
matching Node.
Counts the number of time a connection
attempt is made
Counts the number of times the driver
responds to connection attempts when
acting as a Server
Counts the number of connection attempts
that timed out.
Counts the number of connection and poll
messages sent by the Client (whole
messages only)
Counts the number of simple ack/nak’s sent
by Client. These ack/nak’s indicate
messages if formatted correctly, however
the device can not necessarily respond to
the request.
Byte count includes ack/nak's sent and all
fragments and connection
Same as for Client
Counts ack/nak’s, and all message
fragments excluding attach responses
DRV_DLL_CLIENT_RCVS_BYTES
Byte count from above messages
Counts message fragments and ack/nak’s
rcvd from Client but excludes Client
DRV_DLL_SERVER_RCVS_MSG
responses to Server fragments
DRV_DLL_SERVER_RCVS_BYTES
Byte count for above messages
Count of timeouts caused by no response
DRV_DLL_TIMEOUT
or ic_timeout at the DLL layer
Count of the number of times that the DLL
DRV_DLL_ERROR
layer went into an error state.
The error code from the most recent DLL
DRV_DLL_ERROR_CODE
error is stored here.
Corresponds to slave driver actions in
GE_STAT_DRV_ACT_NODE_OFFLINE_R responding to a poll. The polled Node is
offline.
Corresponds to slave driver actions in
responding to a poll. There is no Map
GE_STAT_DRV_ACT_NO_MAPDESC_R
Descriptor that can be used to process the
poll from the Client.
29 DRV_DLL_CLIENT_RCVS_MSG
30
31
32
33
34
35
36
37
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Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 24 of 29FS-8700-66_GE-SNP Manual
No Message
38 GE_STAT_DRV_ACT_NO_DATA_R
39 GE_STAT_DRV_ACT_NO_NODE_R
40 GE_STAT_DRV_ACT_NAK_R
41 GE_STAT_DRV_ACT_NORMAL_R
42 GE_STAT_CD_UPD_CHECK
43 GE_STAT_CD_UPD_FUNCTION
44 GE_STAT_CD_UPD_NO_START
45 GE_STAT_CD_UPD_PROTO
46 GE_STAT_CLIENT_SENDS_FRAG
47 GE_STAT_CD_UPD_IC_TIMEOUT
48 GE_STAT_CD_UPD_MSG_IGNORED
49 GE_STAT_CD_UPD_NAK
50 GE_STAT_CD_UPD_STREAMING
Page 24 of 29
Description
Corresponds to slave driver actions in
responding to a poll.
There is no data
available.
Corresponds to slave driver actions in
responding to a poll.
This should never
happen as a connection would have been
refused.
The slave cannot respond to a poll for one
of the reasons above.
The Server has responded to a poll
normally
A message is invalid because the
checksum failed.
A message is invalid because the message
type is not known.
A message is invalid because it begins with
the wrong codes.
A message is invalid because it is
unexpected in its current context or some
other reason.
Counts the number of read/write message
fragments sent by the Client.
Counts the number of times that an IC
timeout error occurred at the DLL layer
Counts the number of times a message
was ignored. A message will be printed to
the error log with the reason.
Counts the number of times that the slave
received a short nak from the Client
Counts the number of times the DLL layer's
buffer was too full to process additional
incoming data.
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 25 of 29FS-8700-66_GE-SNP Manual
Page 25 of 29
Appendix C. Advanced Topics
Appendix C.1. SNP Node Names
The following notes describe how the Node name is used when the FieldServer is acting as
a Server.
When a Client attempts to establish a connection it may do so by sending the name of the
Node it wishes to connect to or by sending a Null Node name.
If the Client sends a Null Node name then the FieldServer will connect if any SNP Nodes
have been defined for the same port as the Client using the Null name. In such a case the
Node must be connected to a port (This is not always common with FieldServer Server
configurations).
Example: Client uses Null name connection. In this case Node must be connected to the
Client’s port; the Node name is ignored and only one SNP Node per port.
Ports
Port,
P1 ,
baud
….
Nodes
Node_Name,
Node1,
Port
P1
If the Client uses the Node name during a connection attempt then the FieldServer uses
the name to find a matching Node. The name must be an exact match. If a match is found
then the connection can be established. In this case the Node does not have to be tied to
a particular port and thus one Node could respond to different Clients polling it on different
ports. If this method is used and the Node is tied to a port then the Client must poll on the
same port.
Example: Client uses a specific name to connect. In this case provided there is a Node
with a matching name the connection will be made
Ports
Port,
P1,
baud ….
….
Nodes
Node_Name,
Node1,
Protocol
SNP
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 26 of 29FS-8700-66_GE-SNP Manual
Page 26 of 29
Appendix C.2. Scaling
Scaling was added in version 1.02a and is not supported for earlier versions.
Scaling is applied by the driver when bytes and registers are stored.
When bit data is transferred in bit format than scaling is not applied. When bit data is
transferred using bye format’s then scaling may be applied.
Scaling is applied using the FieldServer’s standard Map Descriptor parameters.
Data_Array_Low_Scale,
Data_Array_High_Scale,
Device_Low_Scale,
Device_High_Scale
Appendix C.3. Server Response NAK, Major and Minor Error Codes
From version 1.02c the when the Server responds with a MailBox Nak it now allocates
different Major and Minor error codes to differentiate the NAK reasons.
0x05 0xbe No Such Node The request Node is not known by the Server.
0x05 0xbd No Data
The Data age is greater than the CACHE_AGE setting.
0x05 0xbc Other Problems Eg. No Server MD’s defined for requested data.
Major Error Status Codes
Error Status
01h Illegal Service Request:
02h Insufficient Privilege:
04h Protocol Sequence Error:
05h Service Request Error:
06h Illegal Mailbox Type:
07h The PLC CPU's Service Request
Queue is full. The master should retry
later.
Description
Either not defined or not supported.
Minor status field contains the privilege level required
for the service request
The CPU has received a message that is out of order.
Minor status field contains the request specific error
code. See table of Minor Error Status Codes below.
Service request mailbox type is either undefined or
unexpected.
It is recommended that the master wait a minimum of
10 ms before sending another service
Minor Error Status Codes
Decimal
-1
-2
-3
-4
-5
-6
-7
-8
-9
Hex
0FF
0FE
0FD
0FC
0FB
0FA
0F9
0F8
0F7
Description
Service request has been aborted.
No privilege for attempted operation.
Unable to perform auto configuration.
I/O configuration is invalid.
Cannot clear I/O configuration.
Cannot replace I/O module.
Task address out of range.
Invalid task name referenced.
Required to log in to a task for service.
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 27 of 29FS-8700-66_GE-SNP Manual
Decimal
-10
-11
-12
-13
-14
-15
-16
-17
-18
-19
-20
-21
-22
-23
-24
-25
-26
-27
-28
-29
-30
-31
-32
-33
-34
-35
-36
-37
-38
-39
-40
-41
-42
-43
-44
-45
-46
-47
-48
49
-50
-51
-52
-53
-54
-55
-56
-57
-58
-59
-60
-61
Hex
0F6
0F5
0F4
0F3
0F2
0F1
0F0
0EF
0EE
0ED
0EC
0EB
0EA
0E9
0E8
0E7
0E6
0E5
0E4
0E3
0E2
0E1
0E0
0DF
0DE
0DD
0DC
0DB
0DA
0D9
0D8
0D7
0D6
0D5
0D4
0D3
0D2
0D1
0D0
0CF
0CE
0CD
0CC
0CB
0CA
0C9
0C8
0C7
0C6
0C5
0C4
0C3
Page 27 of 29
Description
Invalid sweep state to set.
Invalid password.
Invalid input parameter in request.
I/O configuration mismatch.
Invalid program cannot log in.
Request only valid from programmer.
Request only valid in stop mode.
Programmer is already attached.
Could not return block sizes.
VMEbus error encountered.
Task unable to be created.
Task unable to be deleted.
Not logged in to process service request.
Segment selector not valid in context.
No user memory is available to allocate.
Configuration is not valid.
CPU model number does not match.
DOS file area not formatted.
Segment for this selector does not exist.
CPU revision number does not match.
IOS could not delete configuration or bad type.
No I/O configuration to read or delete.
Service in process cannot login.
Invalid Datagram connection address.
Size of Datagram connection invalid.
Unable to locate given connection ID.
Unable to find connection address.
Invalid segment selector in Datagram.
Null pointer to data in segment selector.
Transfer type invalid for this selector.
Point length not allowed.
Invalid Datagram type specified.
Datagram connection boundary exceeded.
Invalid block name specified in Datagram.
Mismatch of configuration checksum.
User Program Module (UPM) read or write exceeded block end.
Invalid write mode parameter.
Packet size or total program size does not match input.
One or more PLC modules configured have unsupported revision.
Specified device is unavailable in the system (not present).
Specified device has insufficient memory to handle request.
Attempt was made to read a device but no data has been stored on it.
Data stored on device has been corrupted and is no longer reliable.
A comm or write verify error occurred during save or restore.
Device is write protected.
Login using non-zero buffer size required for block commands.
Password(s) already enabled and cannot be forced inactive.
Passwords are set to inactive and cannot be enabled or disabled.
Control Program (CP) tasks exist but requestor not logged into main CP.
No task-level Rack/Slot configuration to read or delete.
Verify with FA Card or EEPROM failed.
Text length does not match traffic type.
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 28 of 29FS-8700-66_GE-SNP Manual
Decimal
-62
-63
-64
-65
-66
-67
-68
-69
-70
-71
-72
-73
-74
-75
-76
-77
Hex
0C2
0C1
0C0
0BF
0B
0BD
0BC
0B
0B
0B9
0B8
0B7
0B6
0B5
0B4
0B3
-78
0B2
Page 28 of 29
Description
The OEM key is NULL (inactive).
Invalid block state transition.
Bad OMF record checksum in store.
Illegal OMF record type/data contents.
Bad Block Type given in Load/Store.
Block Set (subblock name) not found.
Block Type (e.g., data) not found.
Maximum length of a partial store exceeded.
Block Set already exists, cannot create.
Executable flag in TYPDEF record not set.
Size of the Segment Selector Table in TYPDEF record is not correct.
Segment length in Verify not equal to the segment length of block in the PLC.
Cyclic Redundancy Check (CRC) checksum comparison in Verify failed.
Additive checksum comparison in Verify failed.
Attempt to alter interrupt list in MAIN DECL BLOCK during RUN MODE.
Length limit exceeded; includes read past end of transferred data, writes past
ofprogram block.
Program block already exists and cannot be replaced.
Minor Error Status Codes: Program Load and Store Requests
Decimal,
Hex,
80
50
81
51
85
55
86
56
87
57
88
58
Description
Problem with sending mail to the slave Service Request task. (Series 90-70 PLC
CPUs only).
Problem with getting mail from the slave Service Request task. (Series 90-70
PLC CPUs only).
Slave SNP task timed out before receiving SRP response. (Series 90-70 PLC
CPUs only).
Slave SNP task could not find the requested Datagram connection. (Series 90-70
PLC CPUs only).
Slave SNP task encountered an error in trying to write the Datagram. (Series 9070 PLC CPUs only).
Slave SNP task encountered an error in trying to update the Datagram. Series
90-70 PLC CPUs only).
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Page 29 of 29FS-8700-66_GE-SNP Manual
Page 29 of 29
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