Memory Configuration (S7) - Siemens SINUMERIK 840D sl Function Manual

Z2: NC/PLC interface signals

19.14 Memory Configuration (S7)

DB31, ...
DBX99.0
Special cases, errors, ...
Corresponding to ....
DB31, ...
DBX99.1
Edge evaluation: No
Signal state 1 or edge
change 0 → 1
Signal state 0 or edge
change 1 → 0
Special cases, errors, ...
Corresponding to ....
19.14 Memory Configuration (S7)
No signal descriptions required.
942
LS (leading spindle) active
In the case of faults/disturbances on the following spindle which result in cancellation of the FS
"servo enable", the coupling relationship between the FS and LS is reversed and switched over
to an actual-value coupling internally in the control under certain circumstances.
In this case, the leading spindle becomes the new, active following spindle (IS "FS active").
DB31, ... DBX84.4 (Synchronous mode)
DB31, ... DBX99.1 (FS active)
FS (following spindle) active
Signal(s) updated: Cyclic
The machine axis is currently operating as the following spindle.
The following spindle thus follows the movements of the leading spindle in synchronous oper‐
ation in accordance with the transmission ratio.
Note:
The signal is relevant only in synchronous operation.
The machine axis is not currently operating as the following spindle.
In the case of faults/disturbances on the following spindle which result in cancellation of the FS
"servo enable", the coupling relationship between the FS and LS is reversed and switched over
to an actual-value coupling internally in the control under certain circumstances.
DB31, ... DBX84.4 (Synchronous mode)
DB31, ... DBX99.0 (LS active)
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions