Configuring The Essential Service Mode - Siemens SINAMICS S120 Function Manual

Basic functions
8.27 Essential service mode (ESM) for CU310-2 on Blocksize power units
8.27.1

Configuring the essential service mode

Procedure
To start essential service mode (ESM), proceed as follows:
1. Interconnect a free digital input as signal source to activate ESM.
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:
– p3881 = 0: Last known setpoint (r1078 smoothed) - factory setting
– p3881 = 1: Fixed speed setpoint 15 (p1015)
– p3881 = 2: Control Unit analog input 0 (AI 0, r0755[0])
– p3881 = 3: Fieldbus
– p3881 = 5: TM31 analog input
– p3881 = 6: Enable OFF1 response
– p3881 = 7: Enable OFF2 response
3. Set the alternative ESM setpoint source using p3882.
– p3882 = 0: Last known setpoint (r1078 smoothed) - factory setting
– p3882 = 1: Fixed speed setpoint 15 (p1015)
– p3882 = 2: Maximum speed (p1082)
4. Set the source to select the direction of rotation.
For p3881 = 0, 1, 2, 3 or 5, if you interconnect p3883 to a free digital input of your choice,
p3883 inverts the direction of rotation during the essential service mode.
For example, to interconnect p3883 with DI 4, set p3883 = 722.4.
5. Optional: Switchover to the bypass mode.
If the converter is not able to acknowledge pending faults with an automatic restart, it signals
fault F07320 and does not make any other attempts to restart.
Proceed as follows if the motor is still to continue operating:
– Set p1266 = 3889.10.
– Ensure that the direction of rotation does not change when switching over to bypass
– Set p1267.0 = 1.
– Commission the "Bypass" function (see Chapter "Bypass (Page 278)").
The essential service mode (ESM) is commissioned.
414
The converter switches the motor to bypass mode with r3889.10 = 1.
operation (correct setting: p3883 = 0).
The converter switches the motor to bypass mode independent of the speed with control
signal p1266.
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Drive functions