Function Blocks
ALT Alternator Function Block
Revision 11 HC900 Hybrid Control Designer Function Block Reference Guide 55
2/07
ALT Alternator Function Block
Description
The ALT label stands for Alternator Function.
This block is part of the Auxiliary category.
Function
The Alternator (ALT) function block is typically used to alternate the starting sequence of a group of
pumps, valves, filters, etc. Each block accepts up to 16 inputs and controls up to 16 outputs.
There are four unique alternation styles used to control the output starting sequence so that you can limit
the amount of repeat or continuous usage of a single device (pumps, valves, etc.). If an output device fails,
or has been disabled, then an alternate device will be used in order to meet the requested demand. You may
specify the alternators active outputs and the order in which the outputs are manipulated.
Each configuration is limited to a maximum of 6 Alternator function blocks.
Inputs
IN1 – IN 16 =. Sixteen digital inputs for requesting an output device. Unconnected pins default to OFF.
DSBL = determines the status of the block:
OFF = Status of block is RUN
- function blocks process normally
- inputs and outputs reevaluated based on current states and style settings
- the STI output pin is set to ON
ON = Status of block is OFF
- function processes disabled, no input/output evaluation
- all On and Off delay timers are reset
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