Omron SYSDRIVE 3G3MV - Input Open-Phase Detection (N166, N167)

6-50
·The following ON/OFF combinations of UP and DOWN commands are possible.
Command Acceleration Deceleration Hold Hold
S6 (UP command) ON OFF OFF ON
S7 (DOWN command) OFF ON OFF ON
·With the UP/DOWN function used, the output frequency has the following restrictions
for upper and lower limits.
Upper limit: Themaximumfrequencyinn011orthefrequencyreferenceupperlimit
in n033, whichever is smaller.
Lower limit: The minimum output frequency in n016 or frequency reference lower
limit in n034, whichever is smaller.
·When the RUNcommandfor forward orreverse rotation isinput, theInverter will start
operating at the lower limit regardless of whether the UP/DOWN command is input or
not.
·When the UP/DOWN function and inching frequency command are both assigned to
multi-function inputs, an inching frequencycommandinputwill have the highest prior-
ity.
·If n100 for UP/DOWN frequency storage is set to 1, the output frequency held by the
UP/DOWNfunctionfor5 s or more will bestoredinthememory. The outputfrequency
willbeheldbytheUP/DOWNfunctionwhenbothUPandDOWNcommandsareONor
OFF together.
6-10-10 Input Open-phase Detection (n166, n167)
· Theinputopen-phasedetectionfunctionisprovidedfor5.5-and7.5-kWInvertersonly.
· This function detects the occurrence of an input power supply open phase. The open
phase is detected by means of fluctuations in the main circuit DC voltage, enabling
detectionofpowersupplyvoltagefluctuationsandimbalances,decreasingvaluesdue
to ageing of the main circuit capacitor, and so on, in the same way.
· IfthefluctuationsinthemaincircuitDCvoltageexceedtheinputopen-phasedetection
level (n166), and persist at this level for longer than the input open-phase detection
time (n167), a main-circuit voltage fault (PF) will be detected.
n166 Input Open-phase Detection
Level
Register 01A6
Hex
Changes during
operation
No
Setting
range
0 to 100 Unit of
setting
1 % Default setting 0
n167 Input Open-phase Detection
Time
Register 01A7
Hex
Changes during
operation
No
Setting
range
0 to 255 Unit of
setting
1 s Default setting 0
Advanced Operation Chapter 6