Mitsubishi Electric MELSEC iQ-R Series User Manual page 248

Alarm status
The alarm information retains the alarm states as bits.
Each word retains 16 alarm statuses, and the alarm Status 0 and 1 indicate reset and occurrence, respectively.
Register b15 b14
+0W No.16 No.15
+1W No.32 No.31
+2W No.48 No.47
+3W No.64 No.63
Alarm report procedure
The following diagram shows the sequence of reporting the alarms of Alarm No. 10 (alarm 10) and Alarm No. 20 (alarm 20).
In the case of an alarm reset, the alarm status is set to 0 (reset), and then Alarm Reset Notification is switched ON.
Programmable Controller CPU
No.10 Bit ON
No.20 Bit ON
Alarm occurrence notification trigger relay ON
Alarm occurrence notification trigger relay OFF
Alarm in processing notification relay ON
Alarm in processing notification relay OFF
Precautions
• When multiple alarms are reported by the set/reset notification triggers simultaneously, the alarms are sent in order from
the alarm with the lowest alarm number.
• Considering the load of the number of alarms to be reported simultaneously, set the number of alarms to the lowest value
possible.
9 SECS/GEM COMMUNICATION SOFTWARE KNOWLEDGE
246
9.5 Sending Alarm Messages (S5F1)
b13 b12 b11 b10
No.14 No.13 No.12 No.11
No.30 No.29 No.28 No.27
No.46 No.45 No.44 No.43
No.62 No.61 No.60 No.59
SECS/GEM communication
Alarm status
b9 b8 b7 b6
No.10 No.9 No.8 No.7
No.26 No.25 No.24 No.23
No.42 No.41 No.40 No.39
No.58 No.57 No.56 No.55
software
Alarm 10 report sending (S5F1)
Alarm 10 report confirmation (S5F2)
Alarm 20 report sending (S5F1)
Alarm 20 report confirmation (S5F2)
b5 b4 b3 b2
No.6 No.5 No.4 No.3
No.22 No.21 No.20 No.19
No.38 No.37 No.36 No.35
No.54 No.53 No.52 No.51
Host
b1 b0
No.2 No.1
No.18 No.17
No.34 No.33
No.50 No.49