Omron Sysmac CJ Series, Operation Manual

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Using the Heater Burnout Alarm Section 3-11
3-10-5 Summary of Alarm Output Function Settings
Starting DM Area Word The starting DM Area word (m) for a Special I/O Unit is calculated as follows:
m = 20000 + (100
×
unit number)
3-11 Using the Heater Burnout Alarm
3-11-1 Heater Burnout Detection
• Follow this procedure to detect heater burnout (an open heating wire).
1,2,3... 1. Pass the heater wire through the hole in the Current Transformer (CT). Re-
fer to
Current Transformer (CT) Ratings on page 14 and Appendix A Di-
mensions for details on the Current Transformer’s specifications, model
numbers, and dimensions.
2. When current flows through the heater wire, it induces an AC current in the
Current Transformer (CT) that is proportional to the current in the heater
DM address Loop Setting Data format Units Initial
value
Word Bits BCD Binary
D (m+0) 12 to 15 Loop 1 Alarm 1 mode 0 to 9 --- --- 0000
08 to 11 Alarm 2 mode 0 to 9 ---
04 to 07 Loop 2 Alarm 1 mode 0 to 9 ---
00 to 03 Alarm 2 mode 0 to 9 ---
D (m+1) 12 to 15 Loop 3 Alarm 1 mode 0 to 9 --- --- 0000
08 to 11 Alarm 2 mode 0 to 9 ---
04 to 07 Loop 4 Alarm 1 mode 0 to 9 ---
00 to 03 Alarm 2 mode 0 to 9 ---
D (m+2) 00 to 15 Loop 1 Alarm 1 hysteresis 0000 to 9999 0000 to 270F
°
C or
°
F 0.0
D (m+3) 00 to 15 Alarm 2 hysteresis 0000 to 9999 0000 to 270F
D (m+4) 00 to 15 Loop 2 Alarm 1 hysteresis 0000 to 9999 0000 to 270F
D (m+5) 00 to 15 Alarm 2 hysteresis 0000 to 9999 0000 to 270F
D (m+6) 00 to 15 Loop 3 Alarm 1 hysteresis 0000 to 9999 0000 to 270F
D (m+7) 00 to 15 Alarm 2 hysteresis 0000 to 9999 0000 to 270F
D (m+8) 00 to 15 Loop 4 Alarm 1 hysteresis 0000 to 9999 0000 to 270F
D (m+9) 00 to 15 Alarm 2 hysteresis 0000 to 9999 0000 to 270F
D (m+10) 00 to 15 Loop 1 Alarm 1 SV F999 to 9999 C3D8 to 3C28
°
C or
°
F 0 or 0.0
D (m+11) 00 to 15 Alarm 2 SV F999 to 9999 C3D8 to 3C28
D (m+20) 00 to 15 Loop 2 Alarm 1 SV F999 to 9999 C3D8 to 3C28
°
C or
°
F 0 or 0.0
D (m+21) 00 to 15 Alarm 2 SV F999 to 9999 C3D8 to 3C28
D (m+50) 00 to 15 Loop 3 Alarm 1 SV F999 to 9999 C3D8 to 3C28
°
C or
°
F 0 or 0.0
D (m+51) 00 to 15 Alarm 2 SV F999 to 9999 C3D8 to 3C28
D (m+60) 00 to 15 Loop 4 Alarm 1 SV F999 to 9999 C3D8 to 3C28
°
C or
°
F 0 or 0.0
D (m+61) 00 to 15 Alarm 2 SV F999 to 9999 C3D8 to 3C28
Heater wire
To the CT terminals