Mitsubishi MELSEC iQ-F User Manual page 128

■Clearing Input signal error detection flag
Clearing input signal errors detection flag differs depending on Input signal error detection/disconnection detection auto-clear
enable/disable setting.
When Input signal error detection/disconnection detection auto-clear enable/disable setting is set to Enable (0)
• When an analog input value falls within the normal range, Normal (0) is stored in the corresponding bit of 'Input signal error
detection flag' (Un\G40).
When Input signal error/disconnection detection auto-clear enable/disable setting is set to Disable (1)
• When an analog input value falls within the normal range, if turning off→on→off 'Error clear request' (Un\G70, b15), Normal
(0) is stored in the corresponding bit of 'Input signal error detection flag' (Un\G40).
• Turning off→on→off 'Operating condition setting request' (Un\G70, b9) allows the flag to be cleared.
Disconnection detection flag
The status of disconnection can be checked for each channel.
b15 b14 b13 b12 b11 b10 b9
0 0 0 0 0
(2)
(1) 0: Normal, 1: Disconnection detection
(2) The values of b8 to b15 are fixed to 0.
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory name
Disconnection detection flag
■Status of Disconnection detection flag
• If a disconnection is detected by the disconnection detection function, disconnection detection flag, which corresponds to
the channel where the disconnection is detected, turns to disconnection detection (1).
• If an error is detected even in one channel, of the channels where conversion is enabled and disconnection detection is
enabled, 'Disconnection detection signal' (Un\G69, b6) turns on.
■Clearing disconnection detection flag
Clearing disconnection detection flag differs depending on Input signal error detection/disconnection detection auto-clear
enable/disable setting.
When Input signal error detection/disconnection detection auto-clear enable/disable setting is set to Enable (0)
• When the disconnection cause is eliminated, and the analog input value falls within the normal range, Normal (0) is stored
in the corresponding bit of 'Disconnection detection flag' (Un\G41).
When Input signal error/disconnection detection auto-clear enable/disable setting is set to Disable (1)
• When an analog input value falls within the normal range, if turning off→on→off 'Error clear request' (Un\G70, b15), Normal
(0) is stored in the corresponding bit of 'Disconnection detection flag' (Un\G41).
• Turning off→on→off 'Operating condition setting request' (Un\G70, b9) allows the flag to be cleared.
Input signal error detection flag/disconnection detection flag [FX2N allocation mode]
The status of an analog input value or disconnection can be checked for each channel.
b15 b14 b13 b12 b11 b10 b9
CH8 CH8 CH7 CH7 CH6
(1) 0: Normal, 1: Detection
APPX
126
Appendix 4 Buffer Memory Areas
b8 b7 b6 b5 b4
0 0 0 CH8 CH7 CH6 CH5
b8 b7 b6 b5 b4
CH6 CH5 CH5 CH4 CH4 CH3 CH3
(1)
b3 b2 b1 b0
CH4 CH3 CH2 CH1
(1)
CH1 CH2 CH3
41
b3 b2 b1 b0
CH2 CH2 CH1 CH1
CH4 CH5 CH6 CH7 CH8