Schweitzer Engineering Laboratories SEL-701 - Controlling Output Contacts & Remote Bits Using Modbus

701 Motor Protection Relay Date Code 20010719
Modbus
®
RTU Communications Protocol
Controlling Output Contacts & Remote Bits Using Modbus
C.14
Controlling Output Contacts
& Remote Bits Using Modbus
The SEL-701 Relay Modbus Register Map (Table C.18 on page C.19) includes
three fields that allow a Modbus Master to control relay output contacts and Relay
Word Remote Bits (see Appendix B: SELogic® Control Equations & Relay Logic).
Use Modbus function codes 06h or 10h to write the appropriate command codes and
parameters into the registers shown in Table C.14.
Table C.14 SE L-701 Relay Mo dbus Command R egion
Table C.15 defines the command codes, their function and associated parameters,
and the function code used to initiate the code.
Table C.14 SEL-701 Relay Modbus Command Region
Address Field
0030h Command Code
0031h Parameter 1
0032h Parameter 2