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Mitsubishi MELSEC Q Series Structured Programming Manual

Mitsubishi MELSEC Q Series
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5.11 Standard Counter Function Blocks
5.11.2 Down counter
5-199
5
APPLICATION
FUNCTIONS
CTD(_E)
CTD(_E)
Operation Error
No operation error occurs in the execution of the CTD (_E) function.
Program Example
The program which counts the number of times that bit type data input to is turned from OFF
to ON, and turns ON when the value of reaches 0.
(a) Function without EN/ENO (CTD)
[Structured ladder]
[ST]
CTD_Inst ( g_bool1, g_bool2, g_int1, g_bool3, g_int2 );
(b) Function with EN/ENO (CTD_E)
[Structured ladder]
[ST]
CTD_E_Inst ( g_bool1, g_bool2, g_int1, g_bool3, g_int2)
s1
d1
d2

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Mitsubishi MELSEC Q Series Specifications

General IconGeneral
SeriesMELSEC Q Series
TypeModular PLC
Programming SoftwareGX Works2, GX Works3
CategoryProgrammable Logic Controller (PLC)
I/O ModulesDigital I/O, Analog I/O, High-Speed Counter, Positioning
CommunicationEthernet, CC-Link
Programming LanguagesLadder Logic, Structured Text, Function Block Diagram, Sequential Function Chart, Instruction List
MemoryFlash Memory
I/O PointsUp to 4096 points (expandable with additional modules)
Power SupplyAC or DC power supply options available, depending on the base unit and modules.
MountingDIN rail mounting
Operating Temperature0°C to 55°C
Storage Temperature-25°C to 75°C
Humidity5% to 95% (non-condensing)
Vibration Resistance10 to 57 Hz, 0.075mm amplitude
WeightVaries depending on the module, from a few grams to several kilograms.
Shock Resistance147 m/s² (3 times each in X, Y, Z directions)

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