ABB ACS850 series, Firmware Manual

Page: 35 / 260

Program features 35
Maintenance counters
The program has six different maintenance counters that can be configured to
generate an alarm when the counter reaches a pre-defined limit. The counter can be
set to monitor any parameter. This feature is especially useful as a service reminder.
There are three types of counters:
• Ontime counter. Measures the time a digital source (for example, a bit in a status
word) is on.
• Rising edge counter. This counter is incremented whenever the monitored digital
source changes state from 0 to 1.
• Value counter. This counter measures, by integration, the monitored parameter.
An alarm is given when the calculated area below the signal peak exceeds a
user-defined limit.
Settings
Parameter group 44 Maintenance (page 173 ).
Mechanical brake control
A mechanical brake can be used for holding the motor and driven machinery at zero
speed when the drive is stopped, or not powered.
Parameters 03.15 Brake torq mem and 03.16 Brake command show the torque value
stored when the brake close command is issued and the value of the brake command
respectively.