Toshiba nv Series - Operation of the Slave Counter

3.3. Operation of the slave counter
8ch Pulse Input Module PI918 Functional Manual
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3.3. Operation of the slave counter
Generally,theslavecounter'smasterisauniversalcounter.  Itoperates
insynchronizationwiththegatesignalandinterruptoftheuniversal
counter.
Theslavecounteralwaysregardsthepreviouschannelasamaster.If
thepreviouschannelisalsoaslave,itcheckstheonebeforethat
channel.  Combinationsofmastersandslavesareasfollows:
Masters：Slaves=1:1(x4)to1:7
Thereisnolimitoncombinationsofmasters:slaves.
BasedonthegatecontrolandinterruptofChannel1,alltheother7
channelsarecontrolled.
Theslavecountersdonotperformgatecontrol(command,external
inputgatesignal)ofthemselves.  Allofthemfollowgatecontrolofthe
mastercounter,andthecontrolvalueistransferredtotheholdregister
attheinterrupttimingofthemastercounter.Themastercounteris
notaffectedbytheslavecounters.
Someexampleapplicationsoftheslavecounterareprovidedbelow.
ExampleconfigurationofMaster:Slave =1:7
Master
Channel1

Slave
Channel2

Slave
Channel3
Slave
Channel5
Slave
Channel4
Slave
Channel7
Slave
Channel6
Slave
Channel8
Master/Slavemixedconfigurationexample
Master
Channel1
(Independent)
Master
Channel2
(Independent)
Master
Channel3
Slave
Channel4
Slave
Channel5
Master
Channel6
Slave
Channel7
Master
Channel8
(Independent)