Siemens SINUMERIK 840D sl Function Manual page 1646

Z1: NC/PLC interface signals
19.11 Spindles (S1)
DB31, ...
DBX83.2 Setpoint speed increased (programmed speed too low)
Application exam‐ In the PLC user program, it can be identified via the interface signal that the spindle setpoint speed
ple(s) has not been reached. Possible responses:
● Indicate that the status is permissible and enable path feed:
● Disable path feed or entire channel:
DB31, ... DBX83.5 (spindle in setpoint range) is processed
The interface signal indicates if the programmed set speed is unattainable. The feed can be enabled
nonetheless by means of the PLC user program.
The PLC user can accept this state as permissible and enable the path velocity, or can disable the
path velocity or the entire channel.
Corresponding to ... DB21, ... DBX6.0 (feedrate disable)
DB31, ... DBX4.3 (feed/spindle stop)
DB31, ... DBX83.5 (spindle in setpoint range)
DB31, ...
DBX83.5 Spindle in setpoint range
Edge evaluation: Yes
Edge change 0 → 1 The actual speed of the spindle deviates from the set speed by less than the spindle speed tolerance:
MD35150 $MA_SPIND_DES_VELO_TOL.
Edge change 1 → 0 The actual speed of the spindle deviates from the set speed by more than the spindle speed tolerance:
MD35150 $MA_SPIND_DES_VELO_TOL.
Normal status during the acceleration/deceleration phase of the spindle.
Signal irrelevant ... All spindle modes except for control mode (speed mode).
for ...
Application exam‐ Feed enable in the channel first with the end of the acceleration phase of the spindle:
ple(s) IF ( DB31, ... DBX83.5 (spindle in the setpoint range) == 1 )
THEN ( DB21, ... DBX6.0 (feed inhibit) = 0 )
ELSE ( DB21, ... DBX6.0 (feed inhibit) = 1 )
Note: With the feed disable, the positioning axes are also stopped.
Corresponding to ... MD35500 $MA_SPIND_ON_SPEED_AT_IPO_START
MD35500 $MA_SPIND_DES_VELO_TOL (spindle speed tolerance)
DB31, ...
DBX83.7 Actual direction of rotation clockwise
Edge evaluation: Yes
Interface signal is only valid if the spindle is rotating:
DB31, ... DBX61.4 (axis/spindle stationary) == 0
The actual direction of rotation is derived from the position measuring encoder.
Edge change 0 → 1 Actual direction of rotation: Clockwise
Edge change 1 → 0 Actual direction of rotation: Counterclockwise
1646
DB21, ... DBX6.0 = 0 (feed disable)
DB21, ... DBX6.0 = 1 (feed disable)
Signal(s) updated: Cyclically
Signal(s) updated: Cyclically
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions