Functional Description
3-13
REMOTE RS-232 COMMUNICATIONS AND SUPPORT
Users can program the relay settings using a remote personal computer connected to the isolated terminal
blocks. This allows the user to program the relay without directly accessing the buttons on the front panel.
Remote programming does not interfere with normal operation. In order for remote pushbutton operations
to begin, the personal computer must be running a terminal emulation program (e.g. Procom
, Telix, or
Windows
) to send (type) and receive (display) ASCII characters in serial data format. The following
parameters are required for the serial data format. Typical values for these parameters are as shown.
•
BAUD RATE = 2400
•
PARITY = NONE
•
DATA BITS = 8
•
STOP BITS = 1
When using Windows
- Terminal, the following terminal preferences are recommended:
•
LOCAL = ON
•
CR
→
CR/LF = ON for both Inbound and Outbound
Communication procedures must follow a specific syntax. Within that syntax is the use of certain
commands and the disuse of any additional keystrokes, such as backspace or delete keys. That is, all
commands must be entered once and entered exactly, or the user can expect an announcement of an
incorrect input (except in the case of the logon command, where it would be ignored completely).
Logon
To initiate the communications routine, the user must enter HELLOBE3GPR. The terminal emulator
screen will reply with the message BE3GPR PROGRAMMING UTILITY ENTERED, and the front panel
LCD on the relay will display SLC, representative of Serial Link Communication.
Logoff
To terminate the communications routine, the user should enter BYE. A successful logoff will be
acknowledged on the terminal emulator screen by the message BE3GPR PROGRAMMING UTILITY
TERMINATED, and the front panel numerical segments will return to the normal display.
Programming
When the logon sequence is complete, the user can program the relay. Entering one of the commands
listed in Table 3-1 (uppercase (capitol letters) are not required), followed by an equal symbol, the set of
numbers separated by commas, and a return alters the relay settings. For example, upon entering OV,
the relay responds with OV = 0, 150, 100, 0, indicating that the present over voltage is disabled, but with a
trip level set for 150 volts, a reset level of 100 volts, and a zero second time delay. By then entering OV =
1, 140, 130, 1, and striking the Enter key, the user has enabled the over voltage function and changed trip
level to 140 volts, the reset level to 130 volts, and the time delay to 1 second. Since this is a valid
command and setup, the relay will implement the change and acknowledge it with the response OV = 1,
140, 130, 1. If the command or setup was incorrect, the response would have been an error message
(Table 3-2).
Table 3-1. Available Commands
Command
Description
HELP
Supplies a list of the command set supported by the relay
HELLOBE3GPR
Logon
BYE
Logoff
S
Supplies a list of all of the current relay settings
Summary of Contents for BE3-GPR
Page 15: ...General Information 1 8 ...
Page 19: ...General Information 1 12 ...
Page 29: ...General Information 1 22 Figure 1 14 Time Characteristic Curve A Standard Inverse 99 1621 ...
Page 30: ...General Information 1 23 Figure 1 15 Time Characteristic Curve B Very Inverse 99 1376 ...
Page 31: ...General Information 1 24 Figure 1 16 Time Characteristic Curve C Extremely Inverse 99 1377 ...
Page 32: ...General Information 1 25 Figure 1 17 Time Characteristic Curve G Long Time Inverse 99 1622 ...
Page 42: ...Functional Description 3 7 Figure 3 3 Selection Menu Sheet 1 of 6 ...
Page 43: ...Functional Description 3 8 Figure 3 4 Selection Menu Sheet 2 of 6 ...
Page 44: ...Functional Description 3 9 Figure 3 5 Selection Menu Sheet 3 of 6 ...
Page 45: ...Functional Description 3 10 Figure 3 6 Selection Menu Sheet 4 of 6 ...
Page 46: ...Functional Description 3 11 Figure 3 7 Selection Menu Sheet 5 of 6 ...
Page 47: ...Functional Description 3 12 Figure 3 8 Selection Menu Sheet 6 of 6 ...
