Siemens SINUMERIK 840D sl Function Manual page 95

System variable
$VA_ENC_ZERO_MON_ERR_CNT[n,ax]
n:
ax:
Measuring systems with absolute encoders
System variable
$VA_ENC_ZERO_MON_ERR_CNT[n,ax]
$VA_ABSOLUTE_ENC_ERR_CNT[n,ax]
$VA_ABSOLUTE_ENC_STATE[n,ax]
n:
ax:
Basic logic functions: Axis monitoring, protection zones (A3)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Encoder number
Machine axis
Encoder number
Machine axis
Meaning
Contains the current number of detected zero-mark
errors.
Power on and the selection/deselection of parking
positions triggers a zero reset; reset does not reset
the counter.
Meaning
Contains the current position difference between the
cyclic position value held in the position control cycle
clock based on the incremental information from the
encoder and a new position value generated from the
encoder's absolute and incremental information.
Power on and the selection/deselection of parking
positions triggers a zero reset; reset does not reset
the counter.
Contains the current number of errors detected when
transferring the absolute values. Monitors the
reliability of the absolute value transfer process.
Power on and the selection/deselection of parking
positions triggers a zero reset; reset does not reset
the counter.
Determines the last error status of the absolute-
encoder interface.
Detailed description
2.1 Axis monitoring
29