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Engineering and remote access
7.4 SIMATIC STEP 7 in the TIA Portal
● Setpoint output voltage
Define the required output voltage.
● Response threshold of the output current
Define the required response threshold value of the output current for the particular
output.
● Prewarning threshold output current
Using prewarning thresholds for the output current of the individual outputs, you can
identify at an early stage slight (creeping) changes in the current demand of the
connected load. This prewarning function facilitates the highest possible availability of the
system (maintenance function).
To deactivate the prewarning threshold, enter "0 %" as value.
● Switch on delay
In order to reduce the load on the overall SITOP PSU8600 power supply system as a
result of simultaneous switch-on current peaks of the loads at the various outputs, an on
delay between the outputs can be selected when switching on.
When the on delay is activated, the outputs are sequentially switched-on with a 25 ms or
100 ms delay time between the outputs, or load optimized.
When the variable on delay is activated, you can assign individual on delay times to the
individual outputs.
● Mode
An overload response can be individually defined for each output.
– In the ELECTRONIC SHUTDOWN operating mode, overload is permitted for a
– In the CONSTANT CURRENT operating mode, an overload current is continually
7.4.7
Loading the configuration (commissioning)
In the delivered state, the SITOP PSU8600 has not yet been assigned any IP address and
the DHCP protocol is deactivated.
When the SITOP PSU8600 is first connected with a controller (SIMATIC S7- control system),
it must be assigned a device name and an IP address by the controller. A new configuration
can be loaded to the device using SIMATIC STEP 7 in the TIA Portal.
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defined time. The output is electronically shut down after the limit value has been
exceeded (see Overload shutdown and carrying out a reset (Page 58)).
permissible (U/I curve) according to a defined characteristic. The overload current is
limited to a maximum of 150 % of the setting value of the current potentiometer for a
duration of 5 seconds (LED "ON/OFF/RST" flashes green with 2 Hz); the current is
then limited to 100 % of the setting value (LED "ON/OFF/RST" flashes green with
1 Hz) as long as there is an overload condition.
Power supply system PSU8600
Manual, 05.2017, A5E36758446-3-76
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