BE1-951
BESTlogic Programmable Logic
7-7
NOTE
There has been a fundamental improvement to the way the user sets up BESTlogic in this
device. In some prior implementations of BESTlogic, it was necessary to make a separate
setting that determined whether the user’s logic scheme or if one of the pre-programmed
logic schemes was to be made active. This setting was made from the ASCII command
interface using the SP-LOGIC (Set Protection Logic) command. This setting has been
eliminated.
In the implementation of BESTlogic used in this relay, the logic scheme defined by the
user’s logic settings is always active. If the user wishes to use a preprogrammed logic
scheme, he now copies it into his user logic settings. This process is accomplished from
the ASCII command interface using the SL-N (Set Logic Name) command in this and
previous BESTlogic implementations.
If a different preprogrammed logic scheme is required, it can be easily copied to active logic and used as
is, or customized to your specifications. To accomplish this, communication with the relay must be
established. This is referred to as the on-line method of setting or changing the active logic. It is
accomplished by connecting a computer to the front or rear RS-232 port and establishing communication
through compatible terminal emulation software such as Windows® HyperTerminal or Terminal (VT100
emulation). Section 11,
ASCII Command Interface provides detailed information about command structure
and establishing communication with the relay. Appendix D,
Setting Terminal Communications gives
instructions for configuring Windows® HyperTerminal and Terminal for use with the BE1-951.
Any of the six preprogrammed logic schemes stored in relay memory can be copied to the active logic and
customized or used as is. To copy a logic scheme into active logic, use the SL-N=<name> command.
The SL (settings logic) command is used to obtain a list of the logic schemes stored in memory or the
equations associated with a logic scheme. Entering SL: returns a list of the logic schemes available. The
first scheme listed is the active logic scheme. Entering SL: followed by the name of a preprogrammed
scheme returns all equations associated with the named scheme (SL:BUS for example). For custom
schemes, place an equals sign between SL and the logic name (SL=CUSTOM for example). Similarly,
preprogrammed logic commands and parameters are separated by a colon; custom logic commands and
parameters are separated by an equals sign.
SL Command Examples
1.
Read the logic schemes available in memory.
>SL:
USER, BASIC-OC, OC-W-79, OC-W-CTL, FDR-W-IL, BUS, BACKUP, NONE
2.
Read all logic settings associated with the BACKUP logic scheme.
>SL:BACKUP
SL-N:BACKUP
SL-50TP:1,0; SL-50TN:1,0; SL-50TQ:1,0
SL-150TP:1,0; SL-150TN:1,0; SL-150TQ:1,0
SL-51P:1,0
SL-51N:1,0
SL-51Q:1,0
SL-151N:0,0
SL-27P:0,0
SL-59P:0,0; SL-59X:0,0
SL-47:0,0
SL-62:0,0,0
SL-162:0,0,0
SL-79:0,0,0,0,0
SL-81:0,0
SL-181:0,0
SL-281:0,0
SL-381:0,0
SL-481:0,0
SL-581:0,0
