Application As A Self Diagnosis Counter - Toshiba nv Series Operating Instructions (Functional Manual)

3.2.1. Application as a self diagnosis counter

Itcountsandholdsinternalreferencepulsesatcertaincycleswithout
externalinputconnection.
Ifitalwayshasafixedvalue,theinternalcircuitoperationcanbe
determinedasnormal.
 Condition：
Parameter
setting
External
input

 Operation：
(1) Afixedvaluedeterminedbasedoninternalreferencepulsesand
samplingcycleissettotheholdregister.  However,theholdvalue
isnotguaranteeduntilthetimeuptotwotimesthesamplingcycle
elapsesafterstartup.
Internal
referencepulse
Startup(parameter
downloadcomplete)
Sampling
Countvalue
0
Holdvalue
0
Figure 3.2.1.
EP AL
0 0
Pulseinput
Notrequired
T
B
A
B(Specifiedvalue)
A
2T(max.)
 f=Referencepulsefrequency(Hz)
(Indefinite
 T=Samplingcycle(s)
i d)
 B=fxT
Example of self diagnosis counter operation
3.2. Operation of the speed counter
SP SV
1 0
Gateinput
Invalid
8ch Pulse Input Module PI918 Functional Manual
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