Toshiba nv Series - Operation of the Universal Counter

3.1. Operation of the universal counter
8ch Pulse Input Module PI918 Functional Manual
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3.1. Operation of the universal counter
Theuniversalcounterresetsthecountvalueto"0"andstartscounting
inputpulseswhenthegate/commandinputconditionchangesfrom
prohibitiontopermission.  Whenthegateconditionchangesto
prohibition,ittransfersthecountvaluetotheholdregister.
Theconfigurationofprohibition/permissioncontrolofgatesand
commandsisasshownbelow.
Whenthealarmsetting(AL)is"0",thecountreturnsto"0"andthe
interruptstatusbitisreversedwhenthecountvalueandalarmvalue
match.
Whenthealarmsetting(AL)is"1",aninversionoftheinterruptstatus
bitoccurs,butthecountiscontinued.
Someexampleapplicationsoftheuniversalcountersareprovided
below.
Ch1gatepermission
(
‘
1
’
)
Gatebatchpermission
setting
Ch2permission
com
m
and
Ch1gateinput
Ch2gateinput
Ch2gatepermission
(
‘
1
’
)
Ch1permissioncommand