Motor control
SIMOCODE pro
4-20 GWA 4NEB 631 6050-22 DS 03
4.2.3 "Overload relay" control function
Description
With this control function, SIMOCODE pro functions like a solid-state
overload relay. Control commands (e.g. ON, OFF) cannot be issued to the
load. Control stations and inputs of the control function (e.g. ON >, OFF), do
not have any function in the case of overload relays.
When applying the control voltage, SIMOCODE pro automatically closes the
QE3 contactor control; it remains active until it is deactivated by the fault
message of a protection or monitoring system.
The QE3 contactor control must be connected to an arbitrary relay output
that switches off the contactor coil of the motor contactor in case of
overload.
Schematic
Fig. 4-12: Schematic of the "Overload relay" control function, "Protection/Control" function block
Settings
You will find detailed information about the settings in:
Chapter 4.2.2 "General settings and definitions".
Overload relay Description
FB ON Auxiliary control input "Feedback ON" (connection with arbitrary
socket , usually with "Status - Motor current flowing" socket) as
factory default.
Load type You can choose between:
•
Motor
• Resistive load (see Chapter 4.2.2 "General settings and
definitions")
Separate failsafe
function from
control function
• Deactivated
:
Safety-oriented tripping via the DM-F module also affects the
SIMOCODE pro control function, so that additional fault
messages are avoided.
This setting is selected for applications where safety-oriented
tripping directly affects the motor controlled by SIMOCODE pro.
• Activated:
Safety-oriented tripping via the DM-F module does not affect the
SIMOCODE pro control function.
This setting is selected for applications where safety-oriented
tripping does not affect the motor controlled by SIMOCODE pro.
Table 4-6: Overload relay settings
Auxiliary control inputs
Contactor controls
Displays
QE3
FB ON* QLS
(Fault)
*Feedback ON
Protection/Control
Load type
Overload relay
Motor protection
Separate failsafe
control function
function from
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