7-44 Inputs, Outputs, Timers, and Other Control Logic Date Code 20001006
SEL-351 Instruction Manual
Active Setting Group Switching Considerations
The SELOGIC Control Equation display point settings DPn (n = 1 through 8) are available
separately in each setting group. The corresponding text settings DPn_1 and DPn_0 are made only
once and used in all setting groups.
Refer to Figure 7.32 and the following example setting group switching discussion.
Setting Group 1 is the Active Setting Group
When setting Group 1 is the active setting group, optoisolated input IN2 operates as a reclose
enable/disable switch with the following settings:
SELOGIC Control Equation settings:
79DTL = !IN2 + ... [= NOT(IN2) + ...; drive-to-lockout setting]
DP1 = IN2
Text settings:
DP1_1 = 79 ENABLED (displayed when DP1 = logical 1)
DP1_0 = 79 DISABLED (displayed when DP1 = logical 0)
Reclosing Relay Enabled
In Figure 7.32, optoisolated input IN2 is energized to enable the reclosing relay, resulting in:
DP1 = IN2 = logical 1
This results in the display of corresponding text setting DP1_1 on the front-panel display:
79 ENABLED
Reclosing Relay Disabled
In Figure 7.32, optoisolated input IN2 is deenergized to disable the reclosing relay, resulting in:
DP1 = IN2 = logical 0
This results in the display of corresponding text setting DP1_0 on the front-panel display:
79 DISABLED
Now the active setting group is switched from setting Group 1 to 4.
Courtesy of NationalSwitchgear.com
To Next Page
Loading...
