Siemens CU240B-2 Operating Instructions

Commissioning the extended service mode
Procedure
Proceed as follows to commission the essential service mode:
1. Interconnect a free digital input as signal source for the ESM activation.
Example for digital input DI 3: Set p3880 = 722.3.
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:
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.
– p3881 = 4:
The technology setpoint direction of rotation is valid.
5. Optional switching to bypass mode
If the inverter 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 inverter switches the motor to bypass mode with r3889.10 = 1.
– Ensure that the direction of rotation does not change when switching over to bypass
operation.
– Set p1267.0 = 1. The inverter switches the motor to bypass mode independent of the
speed with control signal p1266.
– Commission the "Bypass" function.
Bypass (Page 351)
You have commissioned the essential service mode.
Settings
Parameter Description
p3880 BI: ESM activation signal source (factory setting 0)
Set the signal source to activate essential service mode (ESM) via the digital input
p3881 ESM setpoint source (factory setting 0)
0: Last known setpoint (r1078 smoothed)
1: Fixed speed setpoint 15 (p1015)
2: Control Unit analog input 0 (AI 0, r0755[0])
3: Fieldbus
4: Technology controller
Set the ESM setpoint source via p3884.
6: Enable OFF1 reaction
7: Enable OFF2 reaction
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Advanced commissioning
6.11 Essential service mode
Converter with the CU230P-2 Control Units
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE 247

Siemens CU240B-2 Specifications

General

Brand	Siemens
Model	CU240B-2
Category	Inverter
Language	English