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1
GENERAL SPECIFICATIONS AND PRECAUTIONS FOR USE
1. GENERAL SPECIFICATIONS AND PRECAUTIONS FOR USE
This chapter describes the general specifications and precautions for use of the I/O
modules.
1.1 General Specifications
Refer to the following manual for the general specifications of the I/O modules.
• QCPU User's Manual (Hardware Design, Maintenance and Inspection)
1.2 Precautions for Use
1.2.1 Input module
(1) Simultaneous ON points
(2) Input response time and pulse width
1 - 1
The number of simultaneous on points of input module depends on the input
voltage and ambient temperature.
Refer to the derating chart of the input module specifications.
Input modules may take in noise or the like as an input depending on the pulse
width of a signal.
This pulse width has a value as listed below depending on the parameter-set
response time. Set input response time while fully consider the operating
environment.
Response time setting value (ms)
1
5
10
20
70
For the setting of input response time values, refer to Section 1.3.1.
Minimum value of pulse width
where noise or the like may be
taken in as an input (ms)
0.3
3
6
12
45
MELSEC-Q
1
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