Schweitzer Engineering Laboratories SEL-311L, Instruction Manual, Page: 262 / 734

7-10 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625
SEL-311L Instruction Manual
Settings Change or Active Setting Group Change
If settings are changed (for the active setting group or one of the other setting groups) or the
active setting group is changed, the states of the local bits (Relay Word bits LB1 through LB16)
are retained, much like in the preceding
Power Loss explanation.
If settings are changed for a setting group other than the active setting group, there is no
interruption of the local bits (the relay is not momentarily disabled).
If a local control switch is made inoperable because of a settings change (i.e., the corresponding
label settings are nulled), the corresponding local bit is then fixed at logical 0, regardless of the
local bit state before the settings change. If a local control switch is made newly operable
because of a settings change (i.e., the corresponding label settings are set), the corresponding
local bit starts out at logical 0.
R
EMOTE
C
ONTROL
S
WITCHES
Remote control switches are operated via the serial communications port only (see CON
Command (Control Remote Bit) in Section 10: Line Current Differential Communications
and Serial Port Communications and Commands ).
Figure 7.9: Remote Control Switches Drive Remote Bits RB1 Through RB16
The outputs of the remote control switches in Figure 7.9 are Relay Word bits RB n ( n = 1 to 16),
called remote bits. Use these remote bits in SEL
OGIC
control equations.