Schweitzer Engineering Laboratories SEL-351 - Section 7: Inputs, Outputs, Timers, and Other Control Logic;Section 7: Inputs, Outputs, Timers, and Other Control Logic

Date Code 20001006 Inputs, Outputs, Timers, and Other Control Logic i
SEL-351 Instruction Manual
TABLE OF CONTENTS
SECTION 7: INPUTS, OUTPUTS, TIMERS, AND OTHER CONTROL
LOGIC........................................................................................................ 7-1
Optoisolated Inputs...................................................................................................................7-1
Input Debounce Timers.....................................................................................................7-3
Input Functions.................................................................................................................7-4
Factory Settings Examples ................................................................................................7-4
Input IN1 ..................................................................................................................7-4
Input IN2 ..................................................................................................................7-5
Details on the Remote Control Switch MOMENTARY Position ........................................7-6
Local Control Switches.............................................................................................................7-6
Local Control Switch Types..............................................................................................7-7
ON/OFF Switch ........................................................................................................7-7
OFF/MOMENTARY Switch.....................................................................................7-7
ON/OFF/MOMENTARY Switch..............................................................................7-8
Factory Settings Examples ................................................................................................7-9
Additional Local Control Switch Application Ideas..........................................................7-10
Local Control Switch States Retained..............................................................................7-10
Power Loss..............................................................................................................7-10
Settings Change or Active Setting Group Change.....................................................7-11
Remote Control Switches........................................................................................................7-11
Remote Bit Application Ideas..........................................................................................7-12
Remote Bit States Not Retained When Power is Lost.......................................................7-12
Remote Bit States Retained When Settings Changed or Active Setting Group
Changed..................................................................................................................7-12
Details on the Remote Control Switch MOMENTARY Position ......................................7-12
Latch Control Switches...........................................................................................................7-13
Latch Control Switch Application Ideas...........................................................................7-14
Reclosing Relay Enable/Disable Setting Example ............................................................7-14
Feedback Control ....................................................................................................7-15
Rising Edge Operators.............................................................................................7-15
Use a Remote Bit Instead to Enable/Disable the Reclosing Relay..............................7-17
Latch Control Switch States Retained..............................................................................7-18
Power Loss..............................................................................................................7-18
Settings Change or Active Setting Group Change.....................................................7-18
Reset Latch Bits for Active Setting Group Change...........................................................7-18
Note: Make Latch Control Switch Settings With Care.....................................................7-19
Multiple Setting Groups..........................................................................................................7-21
Active Setting Group Indication.......................................................................................7-21
Selecting the Active Setting Group ..................................................................................7-21
Operation of SELOGIC
®
Control Equation Settings SS1 Through SS6..............................7-22
Operation of Serial Port GROUP Command and Front-Panel GROUP Pushbutton...........7-22
Relay Disabled Momentarily During Active Setting Group Change..................................7-23
Active Setting Group Switching Example 1 .....................................................................7-23
Start Out in Setting Group 1....................................................................................7-25
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