Siemens SINAMICS S120 - Page 197

Drive functions
5.13 Monitoring functions
Hydraulic Drive
System Manual, 04/2015, 6SL3097-4BA00-0BP1
197
Example
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.
When the output signal of the variable signaling function is set, bit 5 in message word
"MELDW" is set during cyclic communication. The "MELDW message word is part of
telegram 166 to be used for the HLA.
Figure 5-23 Variable signaling function
Function diagrams (see SINAMICS S120/S150 List Manual)
•
5301
Servo control
- variable signaling function
Overview of important parameters (see SINAMICS S120/S150 List Manual)
•
p3290
Variable signa
ling function, start
•
p3291
CI: Variable signaling function signal source
•
r3294
BO: Variable signaling function, output signal
•
p3295
Variable signaling function, threshold value
•
p3296
Variable signaling function, hysteresis
•
p3297
Variable signaling fun
ction, pickup delay
•
p3298
Variable signaling function, dropout delay
•
p3299
Variable signaling function, sampling time