Siemens SINAMICS S120 System Manual page 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
Function diagrams (see SINAMICS S120/S150 List Manual)
• 5301
Overview of important parameters (see SINAMICS S120/S150 List Manual)
• p3290
• p3291
• r3294
• p3295
• p3296
• p3297
• p3298
• p3299
Hydraulic Drive
System Manual, 04/2015, 6SL3097-4BA00-0BP1
Variable signaling function
Servo control - variable signaling function
Variable signaling function, start
CI: Variable signaling function signal source
BO: Variable signaling function, output signal
Variable signaling function, threshold value
Variable signaling function, hysteresis
Variable signaling function, pickup delay
Variable signaling function, dropout delay
Variable signaling function, sampling time
Drive functions
5.13 Monitoring functions
197