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Functions
7.7 Protection functions
Inverter with CU240B-2 and CU240E-2 Control Units
184
Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA
Table 7- 22 Setting load failure monitoring
Parameter
Description
P2193 = 1…3
Load monitoring configuration (factory setting: 1)
0: Monitoring is disabled
1: Torque and load failure monitoring
2: Speed and load failure monitoring
3: Load failure monitoring
P070x = 50
Pre-assignment of digital input
50: Load monitoring failure detection
Monitoring is possible via each of the CU's digital inputs. If you want to use digital
input 2, for example, parameterize P0703 = 50
P2192
Load monitoring delay time (factory setting 10 s)
If, after the motor is switched on, the "LOW" signal is present on the associated
digital input for longer than this time, a load failure is assumed (F07936)
For more information, see the List Manual (the parameter list and function diagram 8013).
Speed deviation monitoring
This function is only available for Control Units CU240E-2, CU240E-2 DP, CU240E-2 F and
CU240E-2 DP-F. The monitoring sensor is connected to digital input 3.
The inverter can process a pulse sequence of up to 32 kHz.
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Figure 7-7
Speed deviation monitoring by means of digital input DI3
The speed is calculated from the pulse signal of the digital input in the "probe".
With P0704 = 51, the probe input (P0580) is connected to digital input 3, and P3230 (setting
of the source for speed monitoring) is connected to the probe output (r0586) with BICO
technology.
The calculated speed is compared with the actual speed value from the motor control and, if
an (adjustable) deviation is detected, a response (also adjustable) is triggered.