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19 Display Programs for PLC Data and Messages
19.4 Message signals interface (DB 58)
EMERGENCY STOP TO NC
1 signal:
a) EMERGENCY STOP reported to the NC. The removal of all signals must be
reported to the NC with ACKNOWLEDGE EMERGENCY STOP.
b) Entry in the buffer memory for error and/or operational messages if the
relevant PLC machine data is set.
0 signal:
a) No EMERGENCY STOP reported to the NC.
b) Removal from the buffer memory for messages if the relevant PLC machine
data is set.
Notes:
•
The 1 signal effects rapid braking of the feed drives and spindle drive with max. braking
current. After expiry of the time set by machine data, the position control loop is opened
and the NC assumes follow-up operation. This ensures that the actual position values are
retained even in the EMERGENCY STOP state of the control.
•
The controllers for the feed and spindle drives should remain connected to the power until
the braking procedure has been completed.
•
If the NC was not disconnected from the power supply in the EMERGENCY STOP state,
the axes do not have to be resynchronized (no approach to reference point) after the
EMERGENCY STOP state has been removed.
MESSAGES
1 signal:
Entry in the buffer memory for error and/or operational messages if the relevant
PLC machine data is set.
0 signal:
Removal from the buffer memory for operational messages if the relevant PLC
machine data is set. The buffer memory for error messages is erased by ACK-
NOWLEDGE PLC ERROR MESSAGES.
19–18
©
Siemens AG 1991 All Rights Reserved
05.91
DW 1, DW 2
DW 3 to DW 32
6ZB5 410-0HE02
SINUMERIK 880 (PJ)
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