The standard Space Counting software includes 80 counters with inputs for 12 up counts, and 12 down counts each.  Special optional software is available for additional counters.  Each counter can trigger up to 12 relays in response to a zero count.  Any counter can use input addresses also utilized in any other counter, making it possible to define many different counts from the same inputs.  For example, by using two inputs, in and out, you could define at least three different counters.  A spaces available counter, an occupancy counter, and a cumulative counter.

Each counter can be identified by the user with up to 48 characters of text.  A counter set up screen provided under FUNCTION 4.2 to define counters and to enter text descriptions.  A dynamic display screen is provided to show the status of all counters at a glance.  In addition, all counter activity is logged to the hard disk for future reference and reports.  An added feature is a daily report designed to provide hour by hour counter activity for reconciliation purposes.
 

HOW IT WORKS
You can specify which inputs should increment the counter, and which inputs should decrement the counter.  An input is any alarm monitor point.  Each Reader has two, each Alarm Module has 16, and each Dual I/O Module has 2.

The set up screen also lets you select outputs should you want a relay to pull in when a count reaches zero.  Any relay (Card Readers or Relay Output Modules) can be specified to activate in response to a zero count.  The relay will remain pulled in until the count increases to one.

Both alarm monitor points (XX71 and XX72, where XX equals the module code) are usable as inputs to the counter.  When specified as a counter input, they can also function as alarm inputs as well.

The Command Module Output Relays are both usable as Zero Count Outputs.  When a relay is specified as an output, it will pull in when the counter reaches zero or below.  The relays will immediately drop out when the counter advances above zero.

For the purpose of space counting output definitions, the main relay is considered XX72 and the shunt relay is considered XX71.

IMPORTANT:  If you do not want the shunt relay (XX71) to activate when the main output relay (XX72) is pulled in, you must cut the diode (4110 module only) located at the lower left side of the Command Module.  Cutting this diode will insure independent operation of both relays.

Counter Definitions
Up to 12 input sources can be defined to increment the counter, and the same number to decrement it.  Inputs defined for one counter can also be used as inputs to another counter.

Up to 12 outputs can be defined as a result of a counter reaching zero.  Outputs defined in one counter can be used as outputs for other counters. 

Vehicle Space Counting
For differential counting based on spaces available, exit inputs should be defined to count up, and entrances inputs should be used to count down.  To initialize the counter, simply enter the number of available spaces into the respective counter definition screen when the lot is empty.  Vehicles entering will reduce the available spaces, and vehicles exiting will increase the available spaces.

Offset Differential Counting
You may want the lot full sign to illuminate when there are still a few spaces remaining in the lot, like 5 open spaces.  If the lot holds 100 cars, set the available spaces to 95 when the lot is empty.

For occupancy counting where the count reflects the number of vehicles present, simply use entrance inputs as up counts, and exit inputs as down counts.   To initiate the counter, set it at zero when no vehicles are present.

For accumulative counting, define an input to count up.