Mitsubishi Electric MELSEC iQ-R Series User Manual page 121

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 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
Disconnection detection flag (in Q compatible
mode)
■Status of Disconnection detection flag
If a disconnection is detected in the signal lines from outside, thermocouples, compensation lead wires, cold junction
compensation resistors or Resistance Temperature Detectors, Disconnection detection flag, which corresponds to the
channel where the disconnection is detected, turns to disconnection detection (1) When the cause of the disconnection is
eliminated and the connection of external devices is established, the operation after this recovery varies depending on the
setting of 'Disconnection detection automatic clear enable/disable setting' (Un\G303).
• With 'Disconnection detection automatic clear enable/disable setting' (Un\G303) set to Enable (0), Normal (0) is stored in
the bit corresponding to 'Disconnection detection flag' (Un\G41) of the recovered channel.
• With 'Disconnection detection automatic clear enable/disable setting' (Un\G303) set to Disable (1), 'Disconnection detection
flag' (Un\G41) holds the status at the time of the disconnection detection. To return to the normal status, make a recovery
from disconnection of all the channels, and turn on and off 'Error clear request' (YF).
• If an error is detected even in one channel, of the channels where conversion is enabled and disconnection detection is
enabled, 'Disconnection detection signal' (XC) turns on.
■Clearing Disconnection detection flag by means of 'Operating condition setting request' (Y9)
Turning on and off 'Operating condition setting request' (Y9) allows the flag to be cleared.
Conversion completed flag
The status of the temperature conversion can be checked.
b15 b14 b13 b12 b11 b10 b9
0 0 0 0 0 0 0
(2)
(1) 0: During conversion or unused, 1: Conversion completed
(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
Conversion completed flag
Conversion completed flag (in Q compatible
mode)
■The status of Conversion completed flag
When the first temperature conversion is completed in the channel where conversion is enabled, the flag turns to Conversion
completed (1). Upon completion of temperature conversion of all the channels where conversion is enabled, 'Conversion
completed flag' (XE) turns on.
■Clearing Conversion completed flag
Turning on and off 'Operating condition setting request' (Y9) turns the flag back to the default (During conversion or unused
(0)), and when the first conversion is completed, the flag turns to Conversion completed (1) again.
b8 b7 b6 b5 b4 b3 b2
0 CH8 CH7 CH6 CH5 CH4 CH3 CH2
(1)
CH1 CH2
41
49
b8 b7 b6 b5 b4 b3 b2
0 CH8 CH7 CH6 CH5 CH4 CH3 CH2
(1)
CH1 CH2
42
10
b1 b0
CH1
CH3 CH4 CH5
b1 b0
CH1
CH3 CH4 CH5
CH6 CH7 CH8
CH6 CH7 CH8
APPX
Appendix 3 Buffer Memory Areas
A
119