Overload Relay" Control Function - Siemens SIMOCODE pro System Manual

Motor control
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
FB ON
Load type
Separate failsafe
function from
control function
Table 4-6: Overload relay settings
4-20
Protection/Control
Auxiliary control inputs
FB ON*
*Feedback ON
Auxiliary control input "Feedback ON" (connection with arbitrary
socket , usually with "Status - Motor current flowing" socket) as
factory default.
You can choose between:
• Motor
• Resistive load (see
definitions")
• 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.
Contactor controls
QE3
Overload relay
Motor protection
Load type
Displays
Separate failsafe
function from
QLS
control function
(Fault)
Description
Chapter 4.2.2 "General settings and
GWA 4NEB 631 6050-22 DS 03
SIMOCODE pro