Schweitzer Engineering Laboratories SEL-701 - Section 10: Maintenance & Troubleshooting; Routine Maintenance Checks; Self-Testing; Troubleshooting Procedure

Date Code 20010719 701 Motor Protection Relay
Table of Contents
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Section 10: Maintenance & Troubleshooting
Routine Maintenance Checks .........................................................................10.1
Self-Testing.....................................................................................................10.3
Troubleshooting Procedure.............................................................................10.6
Power Supply Fuse Replacement....................................................................10.8
Real-Time Clock Battery Replacement ..........................................................10.9
Firmware Upgrade Installation .....................................................................10.10
Factory Assistance ........................................................................................10.13
Appendix A: Firmware Versions
Appendix B: SEL
OGIC
®
Control Equations & Relay Logic
Introduction...................................................................................................... B.1
Relay Functional Overview ............................................................................. B.2
Relay Word Bits............................................................................................... B.4
SELOGIC Control Equations ............................................................................ B.9
Factory Default Logic Settings ...................................................................... B.13
Front-Panel Display Message Configuration.................................................B.15
Nondedicated SEL
OGIC Control Equation Variable Settings ........................B.16
Latch Control Switch Settings .......................................................................B.17
Stop/Trip Logic.............................................................................................. B.19
Breaker Auxiliary Contact SELOGIC Control Equation Setting ....................B.22
Start and Emergency Restart Logic ...............................................................B.23
ACCESS2 SEL
OGIC Control Equation Setting.............................................. B.25
TARR SELOGIC Control Equation Setting .................................................... B.26
Speed Switch SELOGIC Control Equation Setting......................................... B.27
Event Triggering SELOGIC Control Equation................................................ B.28
Contact Output Control..................................................................................B.29
Remote Control Switches ..............................................................................B.30
Selected Relay Logic Diagrams..................................................................... B.32
Appendix C: Modbus
®
RTU Communications Protocol
Introduction...................................................................................................... C.1
Modbus RTU Communications Protocol......................................................... C.2
01h Read Coil Status Command...................................................................... C.5
02h Read Input Status Command .................................................................... C.6
03h Read Holding Registers Command........................................................... C.7
04h Read Input Registers Command ............................................................... C.8
05h Force Single Coil Command..................................................................... C.9
06h Preset Single Register Command............................................................C.10
07h Read Exception Status Command........................................................... C.11
08h Loopback Diagnostic Command ............................................................C.12
10h Preset Multiple Registers Command ...................................................... C.13
Controlling Output Contacts & Remote Bits Using Modbus ........................ C.14
Reading the Relay Status Using Modbus....................................................... C.16
User-Defined Modbus Data Region...............................................................C.17