Schweitzer Engineering Laboratories SEL-700G1 - Table 4.83 Settings that Always, Never, or Conditionally Hide a Display Point; Table 4.84 Entries for the Four Strings

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