Mitsubishi Electric MELSEC iQ-R Series User Manual page 118

Alert output flag (Process alarm lower limit)
The lower limit alarm of the process alarm can be checked for each channel.
b15 b14 b13 b12 b11 b10 b9
0 0 0 0 0
(2)
(1) 0: Normal, 1: Alarm ON
(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
Alert output flag (Process alarm lower limit)
■Alert output flag status
• If the limit specified by the process alarm lower lower limit value is exceeded, Alarm ON (1) is stored in 'Alert output flag
(Process alarm lower limit)' (Un\G37) of the corresponding channel.
• If an alert is detected even in one channel, of the channels where conversion is enabled and the alert output setting
(Process alarm) is enabled, 'Alert output signal' (XD) also turns on.
■Clearing Alert output flag
• As the measured temperature value returns to the setting range, the flag is automatically cleared.
• Turning on and off 'Operating condition setting request' (Y9) allows the flag to be cleared.
Alert output flag (Process alarm) [Q compatible mode]
When the Q compatible mode function is used, the upper/lower limit alarm of the process alarm can be checked.
b15 b14 b13 b12 b11 b10 b9
CH8 CH8 CH7 CH7 CH6
(1) 0: Normal, 1: Alarm ON
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory name
Alert output flag (Process alarm) (in Q
compatible mode)
■Alert output flag status
• When the value is out of the range specified in the process alarm upper upper limit value or process alarm lower lower limit
value, Alarm ON (1) is stored in Alert output flag (Process alarm) corresponding to each channel.
• If an alert is detected even in one channel, of the channels where conversion is enabled and the alert output setting
(Process alarm) is enabled, 'Alert output signal' (XD) also turns on.
■Clearing Alert output flag
• As the measured temperature value returns to the setting range, the flag is automatically cleared.
• Turning on and off 'Operating condition setting request' (Y9) allows the flag to be cleared.
APPX
116
Appendix 3 Buffer Memory Areas
b8 b7 b6 b5 b4
0 0 0 CH8 CH7 CH6 CH5
CH1
37
b8 b7 b6 b5 b4
CH6 CH5 CH5 CH4 CH4 CH3 CH3
(1)
CH1
47
b3 b2 b1 b0
CH4 CH3 CH2 CH1
(1)
CH2 CH3 CH4
b3 b2 b1 b0
CH2 CH2 CH1 CH1
CH2 CH3 CH4
CH5 CH6 CH7
CH5 CH6 CH7
CH8
CH8