Honeywell 900 User Manual page 119

Alternator Edit Setup display
Item
Style
Input Status
Output Status
Revision 9
May 2014
A style is a method used to control the cycling of the 16 outputs. If
different style is selected, the change will not occur until all outputs are in
the OFF state.
DIRECT: Monitors up to 16 inputs and maps them, using the user
adjustable map order on the Output tab, directly to the outputs. If the
Inputs selected are 1, 2, 3, 4, 5, 6 and the Output order mapped is 6, 3, 4,
1, 5, 2; when Input 3 is activated, Output 4 is enabled; or if Input 1 is
activated then Output 6 is enabled.
ROTARY: Uses the sum of the 16 inputs that are set to ON to determine
the required demand for outputs. The output order is managed in a Last
ON/First OFF basis (LOFO). If the Inputs selected are 1, 2, 3 and the
mapped sequence is 1, 2, 3 the alternator sequence changes when NO
outputs (pumps) are required or there is a request to Advance (see
Advance). Depending on the capacity required, Outputs 1, 2, 3 come on in
order. When the demand falls, Output 3 goes OFF, then Output 2, then
Output 1. When Output 1 turns off, the Rotary sequence advances and
Output 2 starts the next cycle. If an input pin is set to "not available", then
that output is forced to OFF and the next available output in the mapping
order is turned ON. If the previously bypassed output later becomes
enabled, then it will not be used until the demand increases.
FOFO Uses the sum of the 16 inputs that are set to ON to determine the
required demand for outputs. The output order is managed in a First
ON/First OFF basis (FOFO). If 3 Inputs are ON (no mapping), the
Alternator sequence changes (first one in the list moves to the end of the
list) as the inputs turn OFF or, when there is a request for Advance (see
Advance). If an input pin is set to "not available", then that output is forced
to OFF and the next available output is turned ON. If the previously
bypassed output later becomes enabled, then it will not be used until the
demand increases.
FIXED Uses the sum of the 16 inputs that are set to ON to determine the
required demand for outputs. The output order is managed in a
FirstON/First OFF basis (FOFO). If the Inputs selected are 1, 2, 3, 4 and
you map a fixed sequence 4, 2, 3, 1 the sequence will not change unless
you select the Advance feature (see Advance). It takes a direct command
(OFF to ON signal) before the output order map rotates to the 2, 3, 1, 4
sequence. If an output pin is not available then that output is forced OFF
and the next available output in the mapping order is turned ON. If the
previously bypassed output later becomes enabled, then it will not be
used until the demand increases.
On or Off.
Blank – Normal operating output (no designation)
On or Off.
900 Control Station User Guide
Process Displays
Description
Alternator
107