Mitsubishi Electric R60AD8-G User Manual page 123

Input signal error detection signal
■Device number
The following shows the device number of this input signal.
Signal name
Input signal error detection signal
■Turning on 'Input signal error detection signal' (XC)
Input signal error detection signal (XC) turns on when an analog input value exceeds the range set with 'CH1 Input signal
error detection setting value' (Un\G529) in any channel which has been A/D conversion-enabled, after the detection condition
is set in 'CH1 Input signal error detection setting' (Un\G528). When the simple disconnection detection is set, the signal
ignores the setting for 'CH1 Input signal error detection setting value' (Un\G529) is ignored and turns on at the disconnection
detection.
When 'Input signal error detection signal' (XC) turns on, the following operations are performed.
• 'CH1 Digital output value' (Un\G400) and 'CH1 Digital operation value' (Un\G402) hold the digital value just before the error
was detected.
• The ALM LED flashes.
• In Q compatible mode, the corresponding bit of 'A/D conversion completed flag' (Un\G10) turns off. In R mode, the
corresponding bit of 'A/D conversion completed flag' (Un\G42) remains on.
■Turning off 'Input signal error detection signal' (XC)
When 'Input signal error detection signal' (XC) turns off, the following operations are performed.
• The ALM LED turns off.
• 'Latest alarm code' (Un\G2) is cleared.
'Input signal error detection
flag' (Un\G40)
'Input signal error detection
OFF
signal' (XC)
OFF
'Error clear request' (YF)
■'Input signal error detection auto-clear enable/disable setting' (Un\G302) is set to Disable (1)
The following operations are performed by turning on and off 'Error clear request' (YF) after the cause of the input signal error
is eliminated and the analog input value returns within the setting range.
• 'Input signal error detection signal' (XC) turns off.
• 'Input signal error detection flag' (Un\G40) turns off.
• The ALM LED turns off.
• 'Latest alarm code' (Un\G2) is cleared.
■'Input signal error detection auto-clear enable/disable setting' (Un\G302) is set to Enable (0)
The following operations are performed after the cause of the input signal error is eliminated and the analog input value
returns within the setting range.
• 'Input signal error detection signal' (XC) turns off.
• 'Input signal error detection flag' (Un\G40) turns off.
• The ALM LED turns off.
• Averaging processing starts over after the A/D conversion resumes.
• 'Input signal error detection signal' (XC) operates only when the input signal error detection function is
enabled. When the input signal error detection function is disabled, 'Input signal error detection signal' (XC)
always turns off.
CH1 to CH16
XC
Controlled by the A/D converter module
Controlled by the program
Input signal error
0
ON
ON
0
OFF
OFF
APPX
121
Appendix 2 I/O Signals
A