4.5
Date Code 20120126
Instruction Manual
SEL-2032 Communications Processor
SEL
OGIC
Control Equations
Outputs
Outputs
You use SEL
OGIC
control equations to control output contacts, intermediate
logic, and auto-message triggers.
Contact Outputs
Four output contacts on the optional I/O board are controlled by SEL
OGIC
control equations. The output contact equations are processed every 3.9
milliseconds. An output contact will be asserted (closed for a type A contact)
when its corresponding SEL
OGIC
control equation is true; it will be deasserted
when its corresponding SEL
OGIC
control equation is false. Contact output
SEL
OGIC
control equations are established in the global settings.
In the SEL-2032, there is an additional output contact equation, ALARM.
This equation is for controlling the alarm contact. The alarm contact closes for
self-test failures, regardless of this setting. With this setting, you can control
what additional conditions the alarm contact is closed for. This equation will
be processed every 3.9 milliseconds, like the other outputs.
Global
Intermediate
Logic
Five intermediate logic elements (V, W, X, Y, Z) may be used to hold
intermediate results. These elements also have associated pickup/dropout
timers which the SEL-2032 may use for various timing functions. These
elements are processed every 15.6 milliseconds.
The timers operate as standard pickup/dropout timers. For a timer output (VT,
WT, XT, YT, or ZT) to assert, the corresponding input must be true for the
pickup time. Similarly, for a timer output to deassert once it has asserted, the
corresponding input must be false for the dropout time. Pickup and dropout
times can be set to zero to disable them.
Intermediate logic SEL
OGIC
control equations and timer values are
established in the global settings.
In the SEL-2032, there is also an equation for PCFAIL. This is an element
which appears in the global elements to indicate protocol card failure. You can
modify this equation to suit your particular definition of a card failure. You
can then use this result to indicate card failure to your system.
Local
Intermediate
Logic
There are 96 intermediate logic elements associated with each port. These
elements operate together to form 32 S-R latches where 32 elements are set
elements, 32 are clear elements, and 32 are the latch outputs. The set and clear
elements are driven by SEL
OGIC
control equations (SET L), by master port
Fast Operate commands, and by Modbus
®
, and DNP3 operations. See
for information on using Fast Operate commands,
Modbus control, and DNP3 control.
illustrates the relationship of
these control methods.
NOTE:
If the set and clear elements
are asserted at the same instant (for
example, by assigning both of them to
the same input bit), the corresponding
latch output will also assert. However,
even if the auto-message setting
SEND_OPER = Y, the SEL-2032 will
not send an operate command along
with assertion of the latch output.
Figure 4.2
Example of Latch Operation
BR1
CBR1
SBR1
S
R
Q
SBR1 Equation Result
Fast Operate Command
Modbus Force Single Coil
DNP Binary Output Operate
CBR1 Equation Result
Fast Operate Command
Modbus Force Single Coil
DNP Binary Output Operate
Содержание SEL-2032
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