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SOFTSW1 function (Function ID: 522001)
ASEQ function§” is in progress
“S4301_FEC_CHG_PLC”
(522001_8C0A041F5D)
“S4301_PLC_CTRL_FAIL”
(522001_870A041F62)
ON-control command
(PLC connection point #2)
“S4301_EX_SS”
(522001_870A041F62)
Figure 4.3-20 ‘Off’ Operation logic using PLC logic†
†Note: To identify the input and output signal-points of the other SOFTSW logics, see
Table 4.3-4, Table 4.3-13, Table 4.3-14, Table 4.3-16, and Table 4.3-18.
‡Note: “operate condition” signal is provided from operate condition scheme. For more
information, see Figure 4.3-21.
§Note: The ASEQ function can provide sequential signals for automatic control.
(vii) Operate condition
Figure 4.3-21 shows the operate condition logic of the SOFTSW1 function. The SOFTSW1
function can examine an operate-condition using “Command Blocking” signal
1
.
SOFTSW1 function (Function ID: 522001)
Same Directional
Controlling Event
Control hierarchy (e.g. 43RL) (PLC connection point #3)*6
IED serious error detected
Users must setup this condition correctly
Function “Automatic sequence control” is in progress
Command blocking*1 (defined as ”CBK”)
Double Command Blocking detected*2
Other devices traveling detected*3
Tripping *4 (“General trip”)
Command “ON control” received
Command “OFF control” received
received
Unmatched condition detected *5
Figure 4.3-21 Operate condition logic for ON/OFF in SOFTSW1
*7
1
Note: “Command Blocking” disables any operation except for itself; See the signal
“S4301_STATE (Table 4.3-2)” as the state of “Command Blocking” in the SOFTSW
function.
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