Pulse Related Instruction - Mitsubishi Electric MELSEC iQ-F FX5 Programming Manual

8.17

Pulse Related Instruction

Instruction correspondence table for CPU module built-in positioning and high-speed
pulse input/output module
The table for instructions corresponding to the CPU module and the high-speed pulse input/output module are shown below.
: Supported, : Not supported
Instruction
SPD
DSPD
PLSY [For the FX3 compatible operand specification]
PLSY [For the FX5 operand specification]
DPLSY [For the FX3 compatible operand specification]
DPLSY [For the FX5 operand specification]
PWM
DPWM
Measuring the density of 16 bit binary pulses
SPD
This instruction counts the number of times the device input specified by (s1) turns off  on only for the time (in 16-bit data
units) specified by (s2)  1ms and stores the operation result in the device specified by (d). The high-speed pulse input/output
module is not supported.
Ladder diagram
(s1)
FBD/LD
EN ENO
s1 d
s2
Setting data
■Descriptions, ranges, and data types
Operand Description
(s1) Pulse input
(s2) Measurement time (Unit: ms)
(d) Head device number for storing the measurement result
EN Execution condition
ENO Execution result
8 APPLICATION INSTRUCTION
588
8.17 Pulse Related Instruction
(s2) (d)
CPU module








Structured text
ENO:=SPD(EN,s1,s2,d);
Range Data type
 Bit/Word
-32768 to +32767 16-bit signed binary

16-bit signed binary

Bit

Bit
High-speed pulse input/
output module








Data type (label)
ANY_ELEMENTARY
ANY16
ANY16
BOOL
BOOL