Features - Mitsubishi Electric MELSEC-Q series User Manual

1.1

Features

(1) Alternating current measurement of eight points (eight channels) by one
module
One module can measure an alternating current with eight points (eight channels).
A CT input range can be selected for each channel.
(2) Reliability by high accuracy
A CT input module can achieve the high accuracy of ±0.5% (when the ambient temperature is 25 ± 5°C) and
±1.0% (when the ambient temperature is 0 to 55°C) at the maximum digital output value.
(3) Operation of a digital output value by the scaling function
The scaling function can represent a digital output value in an easily understandable value depending on a
purpose.
(4) Monitoring of a measured target
By using the input signal error detection function, warning output function, or dropout function, the status of a
measured target can be monitored easily.
(5) Detection of the peak current
• By setting the peak current detection value and peak current detection time, the peak current occurred
excessively at a system start-up or an overload of devices can be detected. Doing so improves
maintainability of devices and the failure diagnosis for a measured target.
• The number of peak current detection is recorded in a non-volatile memory. Therefore the number of peak
current detection is not cleared after turning off the power supply or resetting the CPU module.
16
CT input module
Peak current
detection time
Peak current
detection value
Alarm ON
CT
Measured
target 1
CT
Measured
target 2
8 points (8 channels)
CT
Measured
target 8
Current values from a CT
Time