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10-4
10.11 OVD, ORH, AND OLS PATCH TERMINALS
The OVD (overload) patch terminal, connected to the output of the overload
system, provides a logic output voltage indicating the state of the overload
circuit.
A high at OVD terminal indicates that an overload has occurred,
while a low indicates no overload.
The O'RH (override hold) patch terminal is an input used to force the inte-
grators into the
~
mode should an overload occur in the system.
This
feature requires patching the OVD terminal to the ORR terminal and is usually
used to stop the program solution at the instant an overload occurs.
The OLS (ov.:erload stores) patch terminal is(used to detect and locate short
term, intermittent overload conditions.
During normal operations, the over-
load indicators light as overloads occur and automatically clear themselves
when the overload is cleared.
Patching the OLS terminal to the OVD
te~inal
forces the overload indicator to remain lit even after the overload condition
is removed.
To reset,the patch cord fromOVD to OHS mu&t momentarily be re-
moved.
10.12 PP PATCH TERMINAL
The PP patch terminal provides a buffered output of the analog PP mode.
When
the analog PP pushbutton is depressed (computer in PPmode) the PP patch terminal
goes high.
The output from this terminal can be used for control functions as
required by particular problems.
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