IMPULSE•G+/VG+ Series 4 Technical Manual
November 2022
Page 110
5.2.24 Maintenance Timer
The Maintenance Timer function is based on the VFD run time and will alert an operator, for example, when the
bearings need to be greased. It consists of a digital output (H02-0x = 37) that becomes active when the total
running time has exceeded the amount of time (in hours) programmed in parameter C12-05 and the frequency
reference will be multiplied by a gain (C12-06) to slow the motion down until the bearings have been greased. An
alarm will be posted on the Keypad stating “Maintenance Required”. Once the bearings have been greased, the
output and alarm message can be reset two ways. One method is through a digital input programmed for
Maintenance Reset (H01-xx = 5A) and the second method is by pressing the Mode/Service (Local/Remote) button
three consecutive times with no more than 2 seconds between presses. Press enter to reset the timer. A message
will then appear on the keypad stating that the timer has been reset. The digital output will turn off at this time.
When C12-05 = 0, the function is disabled.
Table 5-40: Maintenance Timer Parameter Settings
5.2.25 Load Share
for more information on Load Share.
Table 5-41: Load Share Parameter Settings
Parameter
Display
Function
Range
Default
C12-05
Maintenance Tmr
Maintenance Timer Alarm Level
0–32767 Hr
0
C12-06
Maintenance Gain
Speed Reference Gain
0.00–1.00
0.50
Parameter
Display
Function
Range
Default
C12-07
LdShare Flt Time
The amount of time to wait for Follower VFD
to give a Ready Signal, when in Load Share,
before triggering a fault.
0.0–25.5 sec
1.5
