4-50 “Job Done” Examples - (Example 6) Date Code 20010518
SEL-2020 Instruction Manual
DWG: 2020_17.vsd
Set A8
Settings
Message
Generator
ISSUE
Setting
MESG Setting
Event Data from
Ports 1 through 7
Modem
(Port 8)
Formatted
Event Report Data
Trigger
Database
Time
Processor
Time
Day-of-Week
Bits
SEL
OGIC
Control
Equation
Processor
1
2
3
4
Q
The SELOGIC Control Equation Processor compares time from the Time Processor and Day-of-Week
elements from the database to the issue conditions. In Example 4, you set the SEL-2020 to collect
event reports. You defined the message trigger condition (ISSUE1) using the SET A command for
Port 8.
R
When message trigger conditions in item
Q
above are met, the SELOGIC Control Equation Processor
sets the D1 trigger bit.
S
The Message Generator detects the D1 bit set and issues MESG1, which instructs the SEL-2020 to
dial the modem using the number specified in the \I string.
T
The SEL-2020 sends formatted event data to the device attached to Port 8.
Figure 4.8: Functional Model of Collection by Modem
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