Reading Status Variables; Motor Measurements; Heatsink Temperature; Identification And Version - Sevcon Gen4 Applications Reference Manual

Reading status variables

All status variables are in Gen4's object dictionary. They can be accessed using SDOs. Some
can be mapped to PDOs for continuous transmission to remote nodes such as displays and
logging devices.

Motor measurements

The following status objects can be read:

Motor slip frequency, currents, voltages and temperature at object 4600

Additional motor debug information is available at 4602

Motor torque, speed, etc. at objects 6000

Heatsink temperature

Read the heatsink temperature at object 5100

Identification and version

Read identification and version information at:

– Controller name.
1008
h

– Hardware version.
1009
h

– Software version.
100A
h

– Identity object. Contains CANopen vendor ID, product code, CANopen protocol
1018
h
revision, and controller serial number.

– NVM (EEPROM) format.
5500
h

– Internal ROM checksum.
5501
h

Battery monitoring

The controller measures actual battery voltage at two points:

Battery voltage; measured at keyswitch input and read at 5100

Capacitor voltage; measured at the B+ terminal and read at 5100
The controller also has a battery discharge indicator (BDI), which can be read at 2790
7-2
.
h
to 67FF .
h h
, sub-index 3.
h
.
h
sub-index 1.
h
sub-index 2.
h
.
h