Schweitzer Engineering SEL-351P - Operation of Serial Port GROUP Command and Front-Panel GROUP Pushbutton

7-20 Inputs, Outputs, Timers, and Other Control Logic Date Code 990215
SEL-351P Manual Técnico
Operation of SEL OGIC Control Equation Settings SS1 through SS6
Each setting group has its own set of SEL
OGIC Control Equation settings SS1 through SS6.
Table SECTION 7: .4: Definitions for Active Setting Group Switching
SEL
OGIC Control Equation Settings SS1 Through SS6
Setting Definition
SS1 go to (or remain in) setting Group 1
SS2 go to (or remain in) setting Group 2
SS3 go to (or remain in) setting Group 3
SS4 go to (or remain in) setting Group 4
SS5 go to (or remain in) setting Group 5
SS6 go to (or remain in) setting Group 6
The operation of these settings is explained with the following example:
Assume the active setting group starts out as setting Group 3. Corresponding Relay Word bit
SG3 is asserted to logical 1 as an indication that setting Group 3 is the active setting group (see
Table SECTION 7: .3).
With setting Group 3 as the active setting group, setting SS3 has priority. If setting SS3 is
asserted to logical 1, setting Group 3 remains the active setting group, regardless of the activity
of settings SS1, SS2, SS4, SS5, and SS6. With settings SS1 through SS6 all deasserted to
logical 0, setting Group 3 still remains the active setting group.
With setting Group 3 as the active setting group, if setting SS3 is deasserted to logical 0 and one
of the other settings (e.g., setting SS5) asserts to logical 1, the relay switches from setting
Group 3 as the active setting group to another setting group (e.g., setting Group 5) as the active
setting group, after qualifying time setting TGR:
TGR Group Change Delay Setting (settable from 0.00 to 16000.00 cycles)
In this example, TGR qualifies the assertion of setting SS5 before it can change the active setting
group.
Operation of Serial Port GROUP Command and Front-Panel GROUP Pushbutton
SEL
OGIC Control Equation settings SS1 through SS6 have priority over the serial port GROUP
command and the front-panel GROUP pushbutton in selecting the active setting group. If any
one
of SS1 through SS6 asserts to logical 1, neither the serial port GROUP command nor the
front-panel GROUP pushbutton can be used to switch the active setting group. But if SS1
through SS6 all
deassert to logical 0, the serial port GROUP command or the front-panel
GROUP pushbutton can be used to switch the active setting group.
See Section 10: Serial Port Communications and Commands for more information on the
serial port GROUP command. See Section 11: Additional Front-Panel Interface Details for
more information on the front-panel GROUP pushbutton.