Mitsubishi Electric NZ2EX2B-60AD4 User Manual page 195

(7) Alert output signal
Alert output signal (RX18, RX28) turns on at the detection of a process alarm.
(a) Process alarm
• The signal turns on when the digital operation value, in the channel where the alert output setting (process
alarm) is active and A/D conversion is enabled, exceeds the range set in CH1 Process alarm lower lower
limit value (address: 010FH, 020FH) to CH4 Process alarm upper upper limit value (address: 011EH,
021EH). In addition, the corresponding bit in Alert output flag (RWrB, RWr1B) turns to "1" and the ALM
LED of the main A/D converter module turns on.
• When the digital operation values for all the conversion-enabled channels are obtained within the setting
range, the corresponding values and status become as follows.
Latest warning code (RWr1)
Bit position corresponding to the channel relevant to Alert output flag
(RWrB, RWr1B)
Alert output signal (RX18, RX28)
ALM LED of the main A/D converter module
Alert output flag
(RWrB, RWr1B)
Alert output signal
(RX18, RX28)
(b) Device number
The device numbers of this input signal are as follows:
Signal name
Alert output signal
Item
Controlled by the A/D converter module
Controlled by the program
0
Alert (process alarm)
ON
Main A/D converter module
RX18
Status
0000H
OFF
OFF
Lights out
0
OFF
Extension A/D converter module
RX28
APPX
A
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