Variable Signaling Function - Siemens SINAMICS S120 Function Manual

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Servo control

5.21 Variable signaling function

Variable signaling function

Function description

Using the "Variable signaling" function, BICO interconnections and parameters that have the

attribute "traceable" can be monitored; otherwise they can also be recorded using the "Device

trace" commissioning function.

The variable signaling function works with an accuracy of 8 ms. This value must also to be taken

into account for pickup and dropout delay.

Enter the desired data source into parameter p3291 of the drive object expert list. In parameter

p3295 define a threshold value for the data source. The hysteresis of the threshold value can

be set with p3296. If the threshold value is violated, then an output signal is generated from

r3294. A pickup delay can be set with p3297 and a dropout delay with p3298 for the output

signal r3294.

The setting of a hysteresis results in a tolerance band around the threshold value. If the upper

band limit is exceeded, the output signal r3294 is set to "1", if it drops below the lower band limit

the output signal is set to "0"

You set the sampling time of the variable signaling function in p3299.

After completing the configuration, activate the variable signaling function with p3290.0 = 1.

Example 1: switching on temperature-dependent heating

Heating should be switched on depending on the temperature. For this the analog signal of an

external sensor is connected with the variable signaling function. A temperature threshold and

a hysteresis is defined to prevent the heating from switching on and off constantly.

Function Manual, 06/2019, 6SL3097-5AB00-0BP2

Drive functions