Siemens SINUMERIK 840D sl Function Manual page 173

B3: Several operator panels connected to several NCUs, distributed systems - only 840D sl
Requirements
The actual current value of axis AX2 can be read via system variable $VA_CURR. In the
case of PROFIdrive-based drives, the following machine data needs to be set for this
purpose:
MD36730 $MA_DRIVE_SIGNAL_TRACKING = 1 (acquisition of additional drive actual
values)
Setting the machine data makes the following drive actual values available:
● $AA_LOAD, $VA_LOAD (drive capacity utilization in %)
● $AA_POWER, $VA_POWER (drive active power in W)
● $AA_TORQUE, $VA_TORQUE (drive torque setpoint in Nm)
● $AA_CURR, $VA_CURR (actual current value of axis or spindle in A)
Programming
NCU1
A static synchronized action is used to write actual current value $VA_CURR of axis AX2 to
the first 8 bytes of the link variables memory cyclically in the interpolation cycle, via link
variable $A_DLR[ 0 ] (REAL value):
Program code
N111 IDS=1 WHENEVER TRUE DO $A_DLR[0]=$VA_CURR[AX2]
NCU2
A static synchronized action is used to read actual current value $VA_CURR of axis AX2,
transferred via link communication, cyclically in the interpolation cycle via link variable
$A_DLR[ 0 ]. If the actual current value is greater than 23 A, alarm 61000 is displayed.
Program code
N222 IDS=1 WHEN $A_DLR[0] > 23.0 DO SETAL(61000)
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
2.8 Link communication
173