CHAPTER 5: SETTINGS
INPUTS/OUTPUTS
L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
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5.9.5.2 Graphical front panel
SETTINGS
INPUTS/OUTPUTS
RESETTING
Some events can be programmed to latch the front panel LED event indicators, target messages, and/or graphical front
panel annunciator windows. Once set, the latching mechanism holds the latched indicators, messages, or windows in the
set state after the initiating condition has cleared until a
RESET
command is received to return these latches (not including
FlexLogic latches) to the reset state where the initiating condition has cleared. The
RESET
command can be sent from the
front panel
RESET
button, a remote device via a communications channel, or any selected operand. The Modbus execute
function 05h with operation code 1 command is also available to perform the same function as the front panel
RESET
key.
RESET OPERAND
— The three sources of
RESET
commands each activates the
RESET OP
FlexLogic operand. Each individual
source of a
RESET
command also activates its individual operand
RESET OP (PUSHBUTTON)
,
RESET OP (COMMS)
, or
RESET OP (OPERAND)
to
identify the source of the command. Each of these three operands generates an event in the event record when activated.
The
RESET OPERAND
setting here selects the operand that activates the
RESET OP (OPERAND)
operand.
RESET ANNUNCIATOR
— Used to select a FlexLogic operand that when activated acknowledges/resets all annunciator
windows on the graphical front panel. The other methods to acknowledge/reset annunciator windows include:
•
On the displayed page, press the
RESET
pushbutton with none of the annunciator windows selected to acknowledge/
reset all annunciator windows on that page
•
To acknowledge/reset a specific annunciator window, use the Up, Down, Left and Right pushbuttons to select the
window, and press the
RESET
or
ENTER
pushbutton
•
All annunciator windows can be reset remotely by programming a Virtual Input (for example Virtual Input 1) as the
input to the
RESET ANNUNCIATOR
setting. Then the Modbus execute function 05h with operation code 1000h command
(or function 10h with address 400h) is used to set the state of Virtual Input 1.
For the
RESET ANNUNCIATOR
setting, the
RESET ANCTR OP
FlexLogic operand is activated by the two sources of
RESET
command, operand source and manual source. Each individual source of a
RESET ANNUNCIATOR
command also activates
its individual operand
RESET OP (OPRD)
or
RESET ANCTR OP (MNUL)
to identify the source of the command. Each of these two
operands generates an event in the event record when activated. The setting here selects the operand that activates the
RESET ANCTR OP (OPRD)
operand. The
RESET
pushbutton on the front panel or the reset command from the software
activates the
RESET ANCTR OP (MNUL)
operand.
5.9.6 Direct inputs and outputs
5.9.6.1 Overview
The relay provides eight direct inputs conveyed on communications channel 1 (numbered 1-1 through 1-8) and eight direct
inputs conveyed on communications channel 2 (on three-terminal systems only, numbered 2-1 through 2-8). The user
must program the remote relay connected to channels 1 and 2 of the local relay by assigning the desired FlexLogic
operand to be sent via the selected communications channel.
This relay allows the user to create distributed protection and control schemes via dedicated communications channels.
Some examples are directional comparison pilot schemes and transfer tripping. Note that failures of communications
channel affect direct input/output functionality. The 87L function must be enabled to utilize the direct inputs.
Direct input and output FlexLogic operands to be used at the local relay are assigned as follows:
•
Direct input/output 1-1 through direct input/output 1-8 for communications channel 1
•
Direct input/output 2-1 through direct input/output 2-8 for communications channel 2 (three-terminal systems only)
On the two-terminal, two channel system (redundant channel), direct outputs 1-1 to 1-8 are sent over both channels
simultaneously and are received separately as direct inputs 1-1 to 1-8 at channel 1 and direct inputs 2-1 to 2-8 at channel
2. Therefore, to take advantage of redundancy, the respective operands from channel 1 and 2 can be ORed with FlexLogic
or mapped separately.
RESETTING
RESET OPERAND:
Off
Range: FlexLogic operand
RESET ANNUNCIATOR:
Off
Range: FlexLogic operand
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Страница 14: ...1 4 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL FOR FURTHER ASSISTANCE CHAPTER 1 INTRODUCTION 1 ...
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