Basler Electric BE1-BPR - Manual (Page 107)

9272000990 Rev J BE1-BPR BESTlogic Programmable Logic 5-1
SECTION 5 • BESTLOGIC PROGRAMMABLE
LOGIC
GENERAL
Basler Electric Standard Trip_logic (BESTlogic) is a flexible and user-friendly programming language for
controlling specific BE1-BPR relay outputs based on combinations of inputs, timers, and outputs. It is not
necessary to change logic circuits in the relay hardware to meet changing needs in your system
environment. Just change the existing logic scheme or create an entire new one using BESTlogic.
Each logic scheme is given a unique name (one to eight characters). The operating characteristics of
each contact input, fault detector (analog input) and timer can be customized based on the application
requirements. Each output is then defined using simple Boolean logic equations with the inputs, outputs,
and timers used as logic variables. The logic defines how each internal functional block operates and how
the blocks are internally connected to achieve the desired output. The unique logic name enables the
operator to change schemes and still be confident that the functions are correct without having to check
the individual equations associated with the logic.
Parameters that do not affect the basic operation or the internal connections of the logic, such as fault
detector pickup settings or timer delay settings, are programmed separately from the logic. These are
programmed settings and a new logic name is not required to change these parameters.
Relay response time is controlled by the internal sample A/D converter (ADC) rate of 12 samples per
cycle. At 60 hertz, the sample interval is 1.389 milliseconds. At 50 hertz, the sample interval is 1.667
milliseconds. After each sample, the status of all inputs, timers, and other functions are updated and then
the output status is updated by evaluating logic equations associated with each output.
Standard BE1-BPR relays have three preprogrammed logic schemes in memory to configure the relay for
common breaker failure applications. Enhanced BE1-BPR relays have six preprogrammed logic
schemes. Not all features of these preprogrammed logics need to be used in order to use a logic scheme.
Typically, inputs and outputs can be disabled by simply leaving them disconnected. Unused CT inputs
should be shorted to minimize noise pickup.
If one of the preprogrammed logic schemes does not meet your needs, a new set of logic equations can
be made. This custom logic scheme is stored in nonvolatile EEPROM. This custom scheme may be
revised or changed completely many times, but only one custom scheme may be stored at one time.
To find out what schemes are in memory, use the LINFO command. Entering LINFO by itself will list the
preprogrammed logics stored in memory, with the first listing being the custom logic scheme stored in
EEPROM. If the LINFO command is followed by the name of one of these schemes, then all logic
equations associated with that logic name will be listed.
OUT Logic scheme names and equations HMI Menu Branch: N/A
Parameter Comments
name LINFO reports the logic scheme names in memory.
LINFO reports the equations associated with logic scheme
LINFO Command
Purpose:
Reads the names of all logic schemes in memory or the equations associated with the
named logic scheme.
Syntax: LINFO[]
Comments: No access is required to read logic scheme names and equations.
LINFO Command Example:
Read the available logic schemes.
LINFO
TEST, BFL1, BFL2, BFL3, BFL1E, BFL2E, BFL3E