Yaskawa Matrix Converter - Manual (Page 220)

Machine Protection
6-
55
„ Operation during Motor Overheat
Set the operation if the motor overheats in parameters L1-03 and L1-04. Set the motor temperature input filter
time constant in L1-05. If the motor overheats, the OH3 and OH4 error codes will be displayed on the digital
operator.
Error Codes If the Motor Overheats
By setting H3-09 (Terminal A2 Function Selection) or H3-05 (Terminal A3 Function Selection) to E (Motor
temperature input), alarm OH3 or OH4 will occur using the PTC temperature-resistance characteristics, and
protect the motor. The terminal connections are shown in the following diagram.
Fig 6.41 Mutual Connections During Motor Overheating Protection
‹ Limiting Motor Rotation Direction
If the motor reverse rotation is prohibited, a Reverse Run Command will not be accepted even if it is input.
Use this setting for applications in which reverse motor rotation can cause problems (e.g., fans, pumps, etc.).
„ Related Parameters
Error Code Details
OH3 MxC stops or continues to operate, according to the setting in L1-03.
OH4 MxC stops according to the setting in L1-04.
Parameter
Number
Name
Description
Setting
Range
Default
Change
during
Run
Control Methods
Display V/f
Open
Loop
Vector
Flux
Vector
b1-04
Reverse Operation
Selection Determines the forward rotation of the motor,
and if reverse operation is disabled.
0: Reverse enabled.
1: Reverse disabled.
0 or 1 0 No A A A
Reverse Oper
MxC
Multi-function
contact input
Branch resistance
18 k
Ω
PTC thermistor
Multi-function
contact output
Fault contact output
Multi-function
PHC output
+ V
(+15 V, 20 mA)
A3
(0-10 V)
AC
M1
M2
MA
MB
MC
P1
P2
PC