Mitsubishi MELSEC iQ-F FX5 series Programming Manual page 645

Function number 10
The measuring start and stop of the pulse density (rotation speed measurement) can be controlled for each channel of the
high-speed counter.
Bit position
b15 b14 b13 b12 b11

Function number 20
Set the value to turn on the bit of the high-speed comparison table number which is to be started or stopped.
Low-order bit position
b15 b14 b13 b12 b11

High-order bit position
b31 b30 b29 b28 b27 b26

Function number 30
For the multi-output high-speed comparison table, specification of a channel is not required. To start the multi-output high-
speed comparison table, set 01H in (s2). To stop it, set 01H in (s3).
Bit position
b15 b14 b13 b12 b11

Function numbers 40 and 50
The measuring start and stop of pulse width measurement and PWM can be controlled for each channel.
Bit position
b15 b14 b13 b12 b11

Precautions
• When the same channel is simultaneously turned on for start and stop, the stop operation is prioritized.
• When the high-speed comparison table is used with the DHIOEN instruction, the total number of high-speed comparisons,
including the DHSCS instruction, DHSCR instruction, DHSZ instruction, and interrupt input of built-in positioning, must be 4
or less.
• To start the multi-output high-speed comparison table (function number: 30), start the high-speed counter using the
(D)HIOEN instruction in advance.
• The high-speed input/output instructions operate according to the following parameters.
Function Function specified by the DHIOEN instruction
number
0 High-speed counter
10 Pulse density (rotation speed measurement)
20 High-speed comparison table
30 Multi-output high-speed comparison table
40 Pulse width measurement
50 PWM
Operation error
Error code Description
(SD0/SD8067)
1810 A channel number which is used in another instruction is specified.
3405 An invalid function number is specified in (s).
3600 A channel number which is not selected in the parameter setting is executed.
b10 b9 b8 b7 b6 b5
CH8 CH7 CH6
b10 b9 b8 b7 b6 b5
b25 b24 b23 b22 b21
b10 b9 b8 b7 b6 b5
b10 b9 b8 b7 b6 b5
b4 b3 b2 b1 b0
CH5 CH4 CH3 CH2 CH1
b4 b3 b2 b1 b0
4 3 2 1
b20 b19 b18 b17 b16
b4 b3 b2 b1 b0
Valid
b4 b3 b2 b1 b0
CH4 CH3 CH2 CH1
Parameter setting
Channel setting of the high-speed counter
Channel setting of the pulse density/rotation speed measurement
High-speed counter
Output setting of the high-speed counter
Output setting of the high-speed counter
Channel setting of the pulse width measurement
Channel setting of PWM
9 HIGH-SPEED COUNTER INSTRUCTION
9.1 High-speed Processing Instruction
9
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