Mitsubishi Electric MELSEC-Q series User Manual page 47

(2) Counting the peak current detection
• The number of peak current detection is stored in CH Peak current detection count (Un\G334 to Un\G341).
• When a peak current is detected, 1 is added in CH Peak current detection count (Un\G334 to Un\G341).
However, next addition is not performed unless a digital output value falls below the peak current detection
value once.
• CH Peak current detection count (Un\G334 to Un\G341) is saved automatically in the non-volatile memory
in the CT input module. When the module starts up by turning off then on, or resetting the CPU module, the
saved detection count is read in CH Peak current detection count (Un\G334 to Un\G341). Therefore, the
number of peak current detection is not cleared even after the power supply was turned off then on, or the
CPU module was reset.
• The count range of CH Peak current detection count (Un\G334 to Un\G341) is 0 to 32767. When the
number of peak current detection exceeds the upper limit of the count range, the number returns to 0.
Peak current
detection value
CH1 Peak current
detection count
(Un\G334)
When a digital output value has exceeded the peak current detection value at power on, the number of peak current
detection is added 1.
(a) Resetting the number of peak current detection
To reset the number of peak current detection, store Reset requested (1) in CH Peak current detection count
reset request (Un\G302 to Un\G309). 0 is stored in CH Peak current detection count (Un\G334 to Un\G341).
After the reset was completed, Reset request completed (1) is stored in CH Peak current detection count
reset complete (Un\G310 to Un\G317).
CH1 Peak current
detection count
(Un\G334)
CH1 Peak current
detection count reset
complete (Un\G310)
CH1 Peak current
detection count reset
request (Un\G302)
Digital output value
Peak current Peak current
detection time detection time
0 1
Controlled by the CT input module
Controlled by the sequence program
Detection count before reset
OFF
OFF
CHAPTER 4 FUNCTIONS
Peak current
detection time
Time
32767 0
0
ON
OFF
ON
OFF
4
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