102
(1) Detection condition
When the following condition is satisfied, a disconnection is detected.
*1 An input range other than the above results in the error code (082H or 182H) being stored in Latest error code
(RWr0), Error flag (RXA) turning on, and the ERR. LED lighting up, with operation at the previous settings.
(2) Notification of an input signal error
(a) For the main A/D converter module
If the analog input value is satisfied the disconnection detection condition, the A/D converter module results in
the following state and an error is notified.
• Input signal error detection flag (RWrA): The bit of the corresponding channel turns on. ( Page 202,
Appendix 2 (5))
• Input signal error detection signal (RX1C): On
• ALM LED of the main module: Flashing
In addition, the alarm code 0B is stored in Latest warning code (RWr1).
(b) For the extension A/D converter module
If the analog input value is satisfied the disconnection detection condition, the A/D converter module results in
the following state and an error is notified.
• Input signal error detection flag (RWr1A): The bit of the corresponding channel turns on. ( Page 202,
Appendix 2 (5))
• Input signal error detection signal (RX2C): On
• ALM LED of the main module: Flashing
In addition, the alarm code 1B is stored in Latest warning code (RWr1).
For details on alarm codes, refer to the following:
• Alarm Code List ( Page 180, Section 11.3)
Input range
*1
Disconnection detection condition
4 to 20mA Input analog value ≤ 2mA
1 to 5V Input analog value ≤ 0.5V
Analog
input value
Time
Error
detected
2mA or 0.5V
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