Siemens SIMOCODE 3UF Programming And Operating Manual page 89

Cold starting
If the motor feeder is in the test position, its main circuit will be isolated from the network.
However, the control voltage will be connected.
The "cold starting" function test is carried out in this status. Cold starting means the motor
feeder is tested without a current in the main circuit.
To differentiate this function from normal operation, it must be enabled via the socket on the
function block.
Feedback stating that the motor feeder is isolated from the mains voltage can result, for
example, via an auxiliary contact of the main switch in the motor feeder that is connected to
any device input (terminal). This is then internally connected to the "Test Position Feedback
(TPF) - Input" plug of the function block.
When using current/voltage measurement modules, this type of auxiliary contact is entirely
unnecessary. The TPF function block can be activated by monitoring for undervoltage
(voltage monitoring function block). If the current flows erroneously during test operation, the
contactor outputs are switched off by "Fault - Test Position Feedback (TPF)".
"Trip - Test Position Feedback (TPF)" fault message and acknowledgement
Note
"Trip - Test Position Feedback (TPF)" will be generated if:
• "TPF" is activated, although current is flowing in the motor feeder
• "TPF" is activated, and current is flowing in the motor feeder.
Settings Test Position Feedback
Input
Type
SIMOCODE PRO V PN FDI
Programming and Operating Manual, 05/2020, A5E44499659002A/RS-AA/001
Control of the "Test Position Feedback (TPF)" function block with any
signal (any sockets, e.g. device input)
Specification of the input logic:
• NO contact (1-active)
• NC contact (0-active)
Standard Functions
12.2 Test Position Feedback
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