Mitsubishi Electric R60AD8-G User Manual page 51

Ex.
The following figure shows the operation when an analog input value falls below 2.4mA and returns within the normal range
under the following condition.
• Input signal error detection auto-clear enable/disable setting (Un\G162): Enable (0)
• Input range: 4 to 20mA
• Input signal error detection extension/input signal error detection setting (Un\G47): Upper limit value/lower limit value same,
Enable (0000H)
• Input signal error detection lower limit value: 2.4mA
Analog input value
Input signal error detection
upper limit value
Input signal error detection
lower limit value
(2.4mA)
CH1 Input signal error detection flag
(Un\G49, b0)
CH2 Input signal error detection flag
(Un\G49, b1)
Input signal error detection signal
(XC)
CH1 A/D conversion completed flag
(Un\G10, b0)
CH2 A/D conversion completed flag
(Un\G10, b1)
ALM LED
■When Input signal error detection auto-clear enable/disable setting is set to Disable (1)
After the analog input value returns within the set range, turn on and off Error clear request (YF).
The A/D converter module arranges the following status when an input signal error is cleared.
• Input signal error detection flag (Un\G49) is cleared.
• Input signal error detection signal (XC) turns off.
• The ALM LED turns off.
• Latest alarm code (Un\G3750) is cleared.
CH2 analog
input value
CH1 analog
input value
Error
detected
ON
OFF
OFF
ON
OFF
ON
OFF
ON
Lights out
Controlled by the A/D converter module
Controlled by the program
Detection range
Out of detection range
Included
Normal
input value
Error
detected
OFF
ON
OFF
OFF
ON
ON
OFF
Flashing Lights out
1.7 Input Signal Error Detection Function
1
Time
1 FUNCTIONS
49