Voltage Offset Definable By Synchronized Action - Siemens SINUMERIK 840D sl Function Manual

11.6.6

Voltage offset definable by synchronized action

Syntax
$A_OUTA[
Number
Number of the parameterized analog output (see below: Parameterization)
• Format: Integer
• Range of values: 1, 2, . . .max. number of analog outputs
oltage offset
V
Just like the voltage offset for CLC_VOFF (see Chapter "Voltage offset, can be set on a block-
specific basis (CLC_VOFF) [Page 490]").
Functionality
A parameterizable output (system variable $A_OUTA) can be used to apply a voltage offset
for clearance control, which, like CLC_OFF, is subtracted from the input voltage of the
clearance sensor.
The voltage offset can be modified in the interpolation cycle by programming the analog
output within a synchronized action.
Parameter assignment
The following machine data is used to parameterize the analog output:
MD62522 $MC_CLC_OFFSET_ASSIGN_ANAOUT (modification of the setpoint distance by
means of sensor signal override)
Example
An external voltage Uext is present at analog input $A_INA[3], which is to be overlaid on the
sensor voltage as a continuously variable voltage offset e.g. for test or start-up purposes.
$A_OUTA[2] is used as an analog output for the clearance control voltage offset.
Parameter setting for the analog output for clearance control voltage offset:
MD62522 $MC_CLC_OFFSET_ASSIGN_ANAOUT = 2 (modification of the setpoint distance
by means of sensor signal override)
The analog input $A_INA[3] is assigned to the clearance control analog output $A_OUTA[2]
within a synchronized action:
ID=1 DO $A_OUTA[2] = $A_INA[3]
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
number oltage offset
] = V
TE1: Clearance control
11.6 Programming
491