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Procedure: Commissioning the essential service mode
1. Interconnect a free digital input as signal source for the ESM activation.
You must use a negated digital input if the essential service mode should also be active for
a ground fault – or if the control cable is interrupted.
Example for negated digital input DI 3: Set p3880 = 723.3.
It is not permissible to interconnect the digital input for ESM activation with other functions.
2. Set the ESM setpoint source via p3881.
3. Set the alternative ESM setpoint source via p3882.
4. Set the source to select the direction of rotation.
– p3881 = 0, 1, 2, 3:
– p3881 = 4:
5. Optional switching to bypass mode
If the converter is not able to acknowledge pending faults with automatic restart, it signals
fault F07320 and does not make any other attempts to restart.
If the motor still continues to operate in this case, you must set the following:
– Set p1266 = 3889.10. The converter switches the motor to bypass mode with
– Ensure that the direction of rotation does not change when switching over to bypass
– Set p1267.0 = 1. The converter switches the motor to bypass mode independent of the
– Commission the "Bypass" function.
You have commissioned the essential service mode.
❒
Example
To improve the air circulation in the stairwells, the ventilation control creates an underpressure
in the building. With this control, a fire would mean that flue gases enter into the stairwell. This
would then mean that the stairs would be blocked as escape or evacuation route.
Using the essential service mode function, the ventilation switches over to the control of an
overpressure. The essential service mode prevents the propagation of flue gas in the stairwell,
thereby keeping the stairs free as an evacuation route as long as possible.
An application example for the essential service mode can be found on the Internet:
support.automation.siemens.com/WW/view/en/63969509)
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
When you interconnect p3883 with a free digital input of your choice, p3883 inverts the
direction of rotation during essential service mode.
For example, to interconnect p3883 with DI 4, set p3883 = 722.4.
The technology setpoint direction of rotation is valid.
r3889.10 = 1.
operation.
speed with control signal p1266.
Bypass (Page 439)
http://support.automation.siemens.com/WW/view/en/63969509
Advanced commissioning
6.9 Drive availability
(http://
431
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