4.225
Date Code 20170814
Instruction Manual
SEL-700G Relay
Protection and Logic Functions
Front-Panel Settings (SET F Command)
Following are examples of selected display point settings, showing the
resulting front-panel displays. For example, at a certain station we want to
display the status of both HV and LV circuit breakers of Transformer 1. When
the HV circuit breaker is open, we want the LCD display to show:
TRFR 1 HV BRKR:
OPEN
. When the HV circuit breaker is closed, we want the display to show:
TRFR 1 HV BRKR: CLOSED
. We also want similar displays for the LV breaker.
After connecting a form a (normally open) auxiliary contact from the HV
circuit breaker to Input
IN101
and a similar contact from the LV circuit breaker
to Input
IN102
of the SEL-700G, we are ready to program the display points,
using the following information for the HV breaker (LV breaker is similar):
➤
Relay Word bit—IN101
➤
Alias—TRFR 1 HV BRKR:
➤
Set String—CLOSED (the form a [normally open] contact
asserts or sets Relay Word bit IN101 when the circuit breaker is
closed)
➤
Clear String—OPEN (the form a [normally open] contact
deasserts or clears Relay Word bit IN101 when the circuit
breaker is open)
Name, Alias, Set String, and Clear String
When all four strings have entries, the relay reports all states.
Figure 4.148 shows the settings for the example, when you use the SET F
command. Use the > character to move to the next settings category.
Table 4.83
Settings That Always, Never, or Conditionally Hide a Display Point
Programmable Automation Controller
Setting
Name
Alias
Set
String
Clear
String
Comment
DP01 := IN101,TRFR1,CLOSED,OPEN
IN101
TRFR1
CLOSED
OPEN
Never hidden
DP01 := IN101,TRFR1
IN101
TRFR1
—
—
Never hidden
DP01 := NA
—
—
—
—
Always hidden
DP01 := IN101,,,
IN101
—
—
—
Always hidden
DP01 := IN101,TRFR1,,
IN101
TRFR1
—
—
Always hidden
DP01 := IN101,TRFR1,CLOSED,
IN101
TRFR1
CLOSED
—
Hidden when IN101 is deasserted
DP01 := IN101,''TRFR 1'',,OPEN
IN101
TRFR 1
—
OPEN
Hidden when IN101 is asserted
DP01 := 1,{}
1
{}
—
—
Displays empty line
DP01 := 1,''Fixed Text''
1
Fixed Text
—
—
Displays the fixed text
DP01 := 0
0
—
—
—
Hides the display point
Table 4.84
Entries for the Four Strings
Name
Alias
Set String
Clear String
IN101
TRFR 1 HV BRKR
CLOSED
OPEN
Содержание SEL-700G Series
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