Chapter 1 Functions; Count Operation; Pulse Input Method - Mitsubishi Electric MELSEC iQ-R Series User Manual

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FUNCTIONS
This chapter describes the functions of the pulse input module and the setting procedures for those functions. For details on
the I/O signals and the buffer memory, refer to the following.
Page 57 I/O Signals
Page 65 Buffer Memory Areas
• This chapter describes I/O signals and buffer memory addresses for CH1. For details on the I/O signals and
buffer memory addresses for CH2 and later, refer to the following.
Page 57 List of I/O signals
Page 65 Lists of buffer memory addresses
• Numerical values come in  of the error codes described in this chapter. These numerical values indicate
details of the error. For details on the numerical values, refer to the following.
Page 52 List of Error Codes
1.1

Count Operation

This section describes the input pulse count operation of the pulse input module as well as how to read each count value.

Pulse input method

The pulse input method of the pulse input module is 1-phase input up count. The down count method is not possible.
The input pulse input signal level, pulse edge, and counting speed (Max.) can be changed with the module parameter
settings.
Input signal level
The input signal level can be changed with "Input voltage selection" of Module Parameters. This can be set to one of the
following values to match the voltage of the input pulse.
• 5VDC
• 12 to 24VDC
Pulse edge
The "Pulse edge selection" of the module parameter can be used to set whether to count input pulses on the rising edge or on
the falling edge.
Pulse edge selection
Pulse up edge
Pulse down edge
Operation
Pulses are counted on their rising edges ().
Pulse input from a pulse
generator (externally)
'CH1 Input pulse value'
(Un\G4, Un\G5)
Pulses are counted on their falling edges ().
Pulse input from a pulse
generator (externally)
'CH1 Input pulse value'
(Un\G4, Un\G5)
1 2 3
1 2 3
1 FUNCTIONS
1.1 Count Operation
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