Chapter 5—System Configuration and Operation
66
Power Xpert C445 Global Motor Management Relay
MN042003EN—January 2019
www.eaton.com
Control Settings
The following parameters are used to configure the Overload
Only Operation Mode and the C445 sources of control.
Table 11. Overload Only Configuration Parameters
Note
1
Soft reset (power cycle) required for changes to these parameters to take effect.
Fieldbus Control Word
The Overload Only profile will accept the following control
commands over a fieldbus network.
Control Bits
Bit 3
0 = No action
1= Reset fault (will clear fault provided condition
has cleared)
Bit 5
0 = No action
1= The C445 will issue a “Test Trip” fault causing
the Output 1 control relay to open
Control Status Word
The control status word of the Overload Only profile can be
accessed over the fieldbus network.
Status Bits
Bit 0
0 = Stopped (No current detected)
1= Running1 (Current flow detected)
Bit 2
0 = local control source active
1= remote control source is active
Bit 3
0 = no fault present
1= C445 fault present
Bit 4
0 = no warning present
1= C445 warning present
Bit 5
0 = no inhibit present
1= C445 control inhibit present
Bit 6
0 = C445 not ready (fault and/or inhibit present)
1= C445 ready for control (No fault or inhibit present)
Bit 7
0 = motor is not up to speed (AtRef)
1= C445 has detected motor is up to speed (AtRef)
Motor status is determined by current readings obtained
from the measurement module. The overload profile will
signal the motor is running when the START threshold
exceeds 30%. Then, when the current drops below 5%,
which is the STOP threshold, the C445 will transition to stop.
Two conditions will then set the AtRef bit, signaling the
motor is up to speed.
●
If motor current first exceeds 115% of the active overload
FLA rating and then decreases back below 115% of the
active overload FLA rating, it is determined the motor has
come up to speed and the AtRef bit will be set.
●
If motor current exceeds 30% of the active overload FLA
rating and remains until after the start delay time expires
the motor is determined to be up to speed and the AtRef
bit will be set.
Configuration Parameter
Modbus Register Description
Read/Write
Active Operation Mode
1
700
This parameter selects the Operation Mode
R/W
Motor#1 Overload FLA Scaled
900
This parameter is used to set the motor nameplate full load amps for the overload
R/W
Motor Overload Trip FLA
500
This parameter contains the active overload FLA
R
Trip Enable Bit Field
1000–1001
Trip (Fault) protection enable bits
Set bits to enable desired motor protections
R/W
Warn Enable Bit Field
1002–1003
Warning protection enable bits
Set bits to enable desired motor protections warnings
R/W
C445 Local Source Selector
1
711
Select the Local Control source.
R/W
C445 Remote Source Selector
712
Select the Remote Control source.
R/W
C445 Q2 Output function select
1
716
Output 2 user function selection
R/W
C445 Q3 Output function select
1
717
Output 3 user function selection
R/W
