BASLER ELECTRIC DECS-200-1C Digital Excitation Control System

BASLER ELECTRIC DECS-200-1C Digital Excitation Control System

ASCII Command Communications

The BE1-GPS100 relay has three independent communications ports for serial communications. A

computer terminal or PC running a terminal emulation program such as Windows HyperTerminal can be

connected to any of the three ports so that commands can be sent to the relay. Communication with the

relay uses a simple ASCII command language. When a command is entered via a serial port, the relay

responds with the appropriate action. ASCII command communication is designed for both human-to

machine interactions and batch download type operations. The following paragraphs briefly describe the

command structure and discuss human-to-machine interactions and batch command text file operations.

The operation of the ASCII commands is described in detail in Section 11. ASCII Command Interface.

Command Structure

An ASCII command consists of a command string made up of one or two letters followed by a hyphen

and an object name. The first letter specifies the general command function and the second a sub-group.

The object name is the specific function for which the command is intended. A command string entered

by itself is a read command. A command string followed by an equal sign and one or more parameters is

a write command. The general command groups are organized into five major groups plus several

miscellaneous commands. These commands are as follows:

C  CONTROL. Commands to perform select before operate control actions such as tripping and closing

the circuit breaker, changing the active setting group, etc. Subgroups include S for Select and O for

Operate.

G  GLOBAL. Perform global operations that do not fall into the other general groups such as password

security. Subgroups include: S for security settings.

M  METERING. Read all real time metering values. This general command group has no subgroups.

P

PROGRAM. Subgroup command to read or program a setting.

R  REPORTS. Read and reset reporting functions such as time and date, demand registers, breaker

duty statistics, etc. Subgroups include: A for Alarm functions, B for Breaker monitoring functions,

Demand recording functions, F for Fault summary reporting functions, G for General information,

and S for sequence of events recorder functions.

S  SETTINGS. Set all setting parameters that govern the functioning of the relay. Subgroups include:

0.1. for settings in setting groups, A for alarm settings, B for breaker monitoring settings, G for

general settings, and L for logic settings.

MISCELLANEOUS. Miscellaneous commands include ACCESS, EXIT, and HELP.

Examples of object names would be 51N for the neutral inverse time overcurrent function or PIA for the A

phase, peak current demand register.

For example, to check the 51N pickup setting in Setting Group 1. you would enter S1-51N for Setting

Group 1. 51N. The relay would respond with the current pickup, time dial and curve settings for the 51N

function. To edit these settings the same command would be used with an = followed by the new settings

and the ENTER pushbutton. Note that it is necessary to use the ACCESS and EXIT commands when

using the write version of these commands.

ASCII Command Operations

Using ASCII commands, settings can be read and changed on a function-by-function basis. The

mnemonic format of the commands helps you interact with the relay. It is not necessary to remember all

of the object names. Most commands do not require that you specify a complete object name. If the first

two letters of a command are entered, the relay will respond with all applicable object names.

Example 1:

Obtain a breaker operations count by entering RB (Report Breaker). The BE1-GPS100

responds with the operations counter value along with all other breaker report objects. If

you know that the object name for the breaker operations counter is OPCNTR, you can

enter RB-OPCNTR and read only the number of breaker operations.

Partial object names are also supported. This allows multiple objects to be read or reset at the same time.

Example 2:

Read all peak-since-reset demand registers. Entering RD-PI (report demand - peak

current) will return demand values and time stamps for phase A, B, C, neutral and

negative-sequence current. To read only the neutral demand value, the full object name

(RD-PIN) is entered. Entering RD-PI=0 resets all five of the peak-since-reset demand

registers.

Batch Command Text File Operations

With a few exceptions, each function of the relay uses one command to set it and each setting command

operates on all of the parameters required by that function. See the example mentioned previously in the

paragraph titled Command Structure. This format results in a great many commands to fully set the relay.

In addition, the process of setting the relay does not use a prompting mode where the relay prompts you

for each parameter in turn until you exit the setting process. For these reasons, a method for setting the

relay using batch text files is recommended.

In batch download type operations, the user creates an ASCII text file of commands and sends it to the

relay. To facilitate this process, the response from a multiple read command is output from the BE1

GPS100 in command format. Therefore, the user need only enter S for Set (with no subgroup) and the

relay responds with all of the setting commands and their associated parameters. If the user enters S1 for

Setting Group 1. the relay responds with all of the setting commands for setting group 1. The user can

capture this response to a file, edit it using any ASCII text editor, and then send the file back to the relay.

See Section 11. ASCII Command Interface, for a more detailed discussion of how to use ASCII text files

for setting the relay.

BESTCOMS™ for BE1-GPS100. Graphical User Interface

Basler Electric's graphical user interface (GUI) software is an alternative method for quickly developing

setting files in a user-friendly, Windows based environment. Using the GUI, you may prepare setting files

off-line (without being connected to the relay) and then upload the settings to the relay at your

convenience. These settings include protection and control, operating and logic, breaker monitoring,

metering, and fault recording. Engineering personnel can develop, test, and replicate the settings before

exporting it to a file and transmitting the file to technical personnel in the field. On the field end, the

technician simply imports the file into the BESTCOMS database and uploads the file to the relay where it

is stored in nonvolatile memory.

The GUI also has the same preprogrammed logic schemes that are stored in the relay. This gives the

engineer the option (off-line) of developing his setting file using a preprogrammed logic scheme,