Generac Power Systems H-100 사용자 설명서

Local trending is done inside the controller where up 
to 1000 samples can be stored in memory. GenLink 
provides an interface to select the analog channels to 
be trended, the rate to be sampled at, and optional 
triggers to be used to specify when to sample. Up to 6 
analog channels can be sampled. However, the 1000 
samples are divided by the number of channels. For 
example, there will be 1000 samples of 1 channel or 
only 166 samples of each of 6 channels. The analog 
samples can be sampled at one of three basic polling 
rates: Low Speed, Mid Speed, and High Speed. For 
the Low Speed and Mid Speed modes, there are also 
several settings that can be used to determine when 
to sample. GenLink can save the data to a file and/or 
display it as a snap-shot graph. The file is MS Excel 
compatible ( CSV format ).

When setting up the local trending, verify that the 
“Armed” box is unchecked and press “Apply”. To 
change the settings with the trending armed may 
result in corrupted data. Select a rate at which to 
take samples.

Low Speed rate samples the processed analog 

channel values at a rate that is able to be set in 
increments of 0.1 seconds.

Mid Speed rate is about 2 milliseconds which 

captures the new analog channel value as soon 
as it is processed by the measurement and alarm 
modules. 

High Speed rate is 0.4 milliseconds and is reserved 

for the raw AC wave forms of generator voltage and 
current. 

There are 6 pull-down boxes that allow the selection of 
up to 6 analog channels. All channel pull-down boxes 
after the first pull-down box with NULL CHANNEL 
selected are ignored. If High Speed is selected, the 
pull-down boxes are not used. Instead, there are 6 
check boxes that can be used to select which voltage 
and current lines are to be trended.

The “Capture When” pull-down box allows the trend-
ing to be limited to the engine running or engine being 
stopped. If the “Stop at End of Buffer” box is selected, 
then the trending will start when the “Capture When” 
condition is true and stop when the 1000 samples 
have been taken.

Any digital or analog channel can be used as an event 
trigger. The event trigger needs to be set up in that 
channel's setup screen. Checking the “Capture Only 
When Trigger is True” box will cause the samples to 
only be taken while the event trigger is true. Checking 
the “Capture on Shutdown Alarm” will cause the sam-
ples to start upon the setting of a shutdown alarm. 
The event trigger can be used to start sampling, stop 
sampling, or center the sampling by selecting the 
appropriate radio button:

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The event trigger is ignored and samples are continu-
ally being placed into the buffer.

Samples are continually being placed into the buffer 
until the event trigger becomes true. Then no more 
samples are placed into the buffer.

No samples are placed into the buffer until the event 
trigger becomes true. Then samples are placed in the 
buffer until it is full.

Samples are continually being placed in the buffer 
until the event trigger becomes true. This point is 
considered ½ of the buffer. Samples continue to be 
placed into the buffer until it is full.

Pressing the “View” button will show a graph of 
the samples in the buffer at the time the button is 
pressed. The graph has a “Save” button that allows 
the user to save the data out to a file in a MS Excel 
compatible ( CSV ) format.

The built-in ILC uses simple combinatorial logic to 
generate digital outputs and limited generator con-
trol. The ILC uses ladder logic for programming, 
and a separate offline programming tool is avail-
able to generate the ILC programs. These are then 
downloaded via GenLink and are started or stopped 
by means of a checkbox on the GenLink ILC page. 
Once downloaded and started, they will remain active 
unless they are stopped via GenLink, even if power 
is cycled.

The I/O scan time of the ILC is about 100 ms worst 
case. This means that all inputs and outputs are 
scanned within 100 ms. Also, the ILC processes 
one rung every 5 ms, so 5 rungs will take 25 ms. 
However, this is in parallel with the I/O scan and not 
added to it.

The offline tool uses graphic symbols to design the 
“rungs” of the ladder logic. The rungs are simple and 
can only have 2 combinatorial elements in them, but 
by the use of “soft contacts” the output of one rung 
can be fed into the input of another to provide more 
combinations. As well as the logical combinations, 
there are also analog comparisons, counters and tim-
ers available for use in the rungs. As an example this 
allows the following type of logic to be built:

IF (in automatic) AND (engine running) AND (air 
temperature >25 deg) FOR (20 seconds) THEN 
OPERATE (output 7).

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