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Servo control

4.19 Variable signaling function

Drive functions

180 Function Manual, 11/2017, 6SL3097-4AB00-0BP5

4.19

Variable signaling function

Variable signaling function for monitoring

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.

Note

The variable signaling function works with an accuracy of 8

ms (also to be taken into account

for pickup and dro

pout 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:

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.

Example 2:

The pressure as process variable is to be monitored, whereby a temporary overpressure is

tolerated. For this, the output signal of an external sensor is connected with the variable

signaling function. The pressure thresholds and a pull-in delay are set as tolerance time.

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