Mitsubishi MELSEC iQ-F FX5 series Programming Manual page 509

General-purpose input assignment of the 2-phase 2-input counter
X0 X1 X2
CH1 A B
CH2 A
CH3
CH4
CH5
CH6
CH7
CH8
• The table below shows the related devices.
Function CH1
Monitor in operation SM4500
High-speed counter pulse SD4507,
density SD4506
Measurement unit time SD4517,
SD4516
• The table below shows the related device update timing.
Function
Monitor in operation
High-speed counter pulse density
Measurement unit time
Precautions
• The maximum input frequency of turning the inputs ON and OFF is shown below:
FX5U-32M CPU module
Used input number
X0 to X5
X6, X7
FX5U-64M/FX5U-80M CPU module
Used input number
X0 to X7
X10 to X17
• When the SPD instruction is used, the UP/DOWN pulse input, preset input and enable input operate in accordance with the
contents set by the parameters of the high-speed counter.
• When the measurement time is changed while the SPD instruction is executed, the changed time is applied every time the
measurement time ends.
• When the SPD instruction is started, the high-speed counter and pulse density measurement are started simultaneously.
When the SPD instruction is stopped, only the pulse density measurement is stopped and the high-speed counter is not
stopped.
• When the current value of the high-speed counter is overwritten, a preset input is executed, or the high-speed counter is
reset by the DHCMOV instruction while the SPD instruction is executed, the operation continues, but the pulse density
cannot be measured normally.
• When the SPD instruction is used, pulses per unit time which exceeds the ring length of the high-speed counter cannot be
input.
A: A phase pulse input, B: B phase pulse input, P: Preset input (reset), E: Enable input (start)
X3 X4 X5 X6
B
A B
A
If one of X1, X3, X5, X7, X11, X13, X15, X17 is specified as a device, an error occurs.
CH2 CH3
SM4501 SM4502
SD4537, SD4567,
SD4536 SD4566
SD4547, SD4577,
SD4546 SD4576
R/W Update timing
R • When the SPD instruction is executed
• When the HIOEN instruction is executed
R • When the measurement time is finished
R/W • When the SPD instruction is executed
X7 X10 X11 X12
P E
P
B
A B P
A
CH4 CH5 CH6
SM4503 SM4504 SM4505
SD4597, SD4627, SD4657,
SD4596 SD4626 SD4656
SD4607, SD4637, SD4667,
SD4606 SD4636 SD4666
Maximum input frequency
200 kHz
10 kHz
Maximum input frequency
200 kHz
10 kHz
X13 X14 X15 X16 X17
E
P E
P
E
B P E
A B P
A
CH7 CH8
SM4506 SM4507
SD4687, SD4717,
SD4686 SD4716
SD4697, SD4727,
SD4696 SD4726
Clear
• Power-on
• Reset
• Power-on
• Reset
• Power-on
• Reset
7 APPLICATION INSTRUCTION
7.14 Pulse related instruction
E
E
B
7
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