Omron 3G3M1-A4110-ECT - Page 426

Example case where overload limit function is activated during acceleration (3004Hex-2CHex/
301FHex-2FHex = 2)
Output current
Inverter
output frequency
3008Hex-41Hex
(Low Frequency during
Protecting Overload)
Target (set) frequency
The drop in frequency is
calculated by automatic con
troller
1st Overload Protect Level
3004Hex-2DHex
Overload Prevention Control
Set the rate of decline of the output frequency of overload prevention control. This function causes the
inverter output frequency to drop before the cooling fin of the inverter overheats (alarm code: 11) or an
overload trip occurs (alarm code: 19), and thus prevents tripping. This function is ef
fective in equip-
ment such as pumps where the load reduces with a drop in the output frequency, but it is necessary to
continue with the operation even when the output frequency drops.
Allocating “36: OLP (Overload prevention controlling)” to Output Terminal [DO1] Function Selection
(3005Hex-15Hex) and Output Terminal [ROA, ROB] Function Selection (3005Hex-1CHex) activates
overload prevention control and indicates that the output frequency changes, and the signal “OLP” that
turns ON during the overload prevention control is output.
Parameter No. Function name Data
Default da-
ta
Unit
3008Hex-47Hex Overload Prevention Control
0.00: Depend on selected
deceleration time
0.01 to 100.00 Hz/s
999: Cancel
999 Hz/s
3005Hex-15Hex/
3005Hex-1CHex
Output Terminal [DO1] Function
Selection/Output T
erminal
[ROA, ROB] Function Selection
36: OLP (Overload preven-
tion controlling)
- -
Related function
Output T
erminal [DO1] ON Delay Time
(3051Hex-0AHex)
Output Terminal [DO1] OFF Delay T
ime
(3051Hex-0BHex)
Output Terminal [ROA, ROB] ON Delay Time
(3051Hex-0EHex)
Output Terminal [ROA, ROB] OFF Delay Time
(3051Hex-0FHex)
*1. Deceleration is performed according to the currently selected deceleration time by the SET, RT1 and RT2
terminals.
*2. The OFF delay becomes the time obtained by adding 0.1 s to Output Terminal[DO1] OFF Delay Time
(3051Hex-0BHex) and Output Terminal [ROA, ROB] OFF Delay T
ime (3051Hex-0FHex).
8 Other Functions
8-72
M1 Series EtherCAT Type User’s Manual (I670)