Mitsubishi Electric MELSEC-Q series User Manual page 45

(2) Notifying an input signal error
When a CT input value exceeds the input range, an input signal error is notified as follows.
• Input signal error (1) is stored in Input signal error detection flag (Un\G49).
• Input signal error detection signal (XC) turns on.
• The ALM LED flashes.
• Alarm code 110 is stored in Latest error code (Un\G19).
Alarm codes are stored as below.
(3) Operation of the input signal error detection function
In addition, Converting or unused (0) is stored in Conversion completed flag (Un\G10) on the corresponding
channel, and Conversion completed flag (XE) turns off.
When the CT input value returns within the input range, the digital conversion resumes regardless of reset of
Input signal error detection flag (Un\G49) and Input signal error detection signal (XC). Conversion completed (1)
is stored in Conversion completed flag (Un\G10) on the corresponding channel after the first update of a digital
output value. (The ALM LED is flashing.)
(4) Detection cycle
This function is executed in each sampling cycle.
(5) Clearing the input signal error detection
After the CT input value returns within the input range, turn on then off Error clear request (YF).
When the input signal error is cleared, the CT input module results in the following states:
• Input signal error detection flag (Un\G49) is cleared.
• Input signal error detection signal (XC) turns off.
• The ALM LED turns off.
• The alarm code 110 which is stored in Latest error code (Un\G19) is cleared.
(6) Setting procedure
1.
Set Enable (0) to Conversion enable/disable setting (Un\G0).
2.
Set Enable (0) to Input signal error detection setting (Un\G47).
3.
Turn on then off Operating condition setting request (Y9).
110
Fixed
Input signal error channel number
CHAPTER 4 FUNCTIONS
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