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Pulse Inputs Section 7-5
7-5 Pulse Inputs
7-5-1 Applicable Models
7-5-2 Outline
The FQM1-MMP21 and FQM1-MMA21 Motion Control Modules can receive
pulse inputs. The following table shows the processes that can be performed
by combining the pulse input function with the high-speed counters to count
pulse signals from a rotary encoder or other device and perform processing
based on the counter PV.
Note Interrupts cannot be generated for range comparisons. Only bit patterns are
output.
The high-speed counter PV movement during a fixed time interval (equivalent
to the travel distance) and the high-speed counter’s frequency can also be
monitored as required.
7-5-3 Specifications
Model Functions
FQM1-MMP21 Motion Control Module for Pulse I/O
FQM1-MMA21 Motion Control Module for Analog I/O
Process Description
Target value comparison
interrupts
An interrupt task is executed when the high-speed
counter PV equals a preset target value.
Bit pattern outputs for
range comparisons
When the high-speed counter PV is within a specified
range, the user-set bit pattern specified in the compari-
son table is output internally.
Measurement
modes 1 and 2
Movement in the high-speed counter or input pulse
counting speed can be displayed while monitoring the
high-speed counter PV.
High-speed counter PV
latch
High-speed counters 1 and 2 each have a latch register.
Two latch inputs can be used to capture the high-speed
counter PVs at high speed.
Item Specification
Number of counters 2
Pulse input operation mode
(Set in System Setup.)
Phase differential Increment/decrement Pulse + direction
Input pin
numbers
High-speed
counter 1
High-speed
counter 2
24 V: 1 (5)
LD: 3 (5)
24 V: 2 (6)
LD: 4 (6)
Phase A Increment pulse Pulse
24 V: 7 (11)
LD: 9 (11)
24 V: 8 (12)
LD: 10 (12)
Phase B Decrement pulse Direction pulse
24 V: 13 (17)
LD: 15 (17)
24 V: 14 (18)
LD: 16 (18)
Phase Z Reset pulse Reset pulse
Input method Phase differential ×1,
×2, or ×4 (switchable)
Single-phase ×2 Single-phase + direc-
tion
Set in the System Setup.
(Set input for pulse input counter 1 and counter 2.)
Counting speed (Set separately for each
port in the System Setup.)
50 kHz (default) or 500 kHz (2 MHz when using phase differential ×4)
Counter operation Linear Counter or Circular Counter (Set in the System Setup.)