Siemens SINAMICS S110 - Variable Signaling Function

Drive functions
7.1 Servo control
Function Manual
176 Function Manual, 01/2011, 6SL3097-4AB10-0BP3
7.1.17 Variable signaling function
Description
The variable signaling function can be used to monitor BICO sources and parameters (with
the attribute "traceable") for violation of an upper or lower threshold value (p3295).
A hysteresis (p3296) can be specified for the threshold value and a pull-in or drop-out delay
(p3297/8) can be specified for the output signal (p3294).
The setting of a hysteresis results in a tolerance band around the threshold value. If the
upper threshold value is exceeded the output signal is set to 1, if it drops below the lower
threshold value the output signal is reset to 0.
After the configuration is completed, the variable signaling function must be activated with
p3290.0.
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:
A process variable "pressure" 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 message word MELDW is a component of
the telegrams 102, 103, 110, 111.
+\VWHUHVLVS
7KUHVKROG
S
7KUHVKROG
0RQLWRUHGVLJQDO
3LFNXSGHOD\S
'URSRXWGHOD\S
H[FHHGHG
XQGHUVKRW
XQGHUVKRW
%,&2RXWSXW
VLJQDO
VLJQDO
W
Figure 7-26 Variable signaling function