Siemens SINUMERIK 880 SW 6 Planning Manual page 235

05.91
MAXIMUM VELOCITY
1 signal: The set velocity of the following axis is greater than the maximum velocity stated
in the machine data. The positional deviation of the following axis from the
leading axes increases; synchronism is endangered. Alarm 2416 "FA 1 velocity
limit" is issued (for FA 1).
0 signal: The velocity of the following axis is less than its maximum velocity.
Notes:
• The signal does not have any significance if the gearbox link is not selected
(LINK ACTIVE = 0).
• The maximum velocity is stated in NC MD 280*.
ACCELERATION WARNING THRESHOLD REACHED
1 signal: The momentary acceleration of the following axis is greater than the value
specified as the acceleration warning threshold. There is a danger of the
synchronism of the leading axes and the following axis being disturbed in the
event of further acceleration.
0 signal: The momentary acceleration of the following axis does not reach the acceleration
warning threshold.
Notes:
• The signal does not have any significance if the gearbox link is not selected
(LINK ACTIVE = 0).
• The acceleration warning threshold is intended to help prevent exceeding the maximum
acceleration. It is stated in machine data as a percentage of the maximum acceleration
value; the same percentage value is valid for the velocity warning threshold.
Warning threshold for acceleration and velocity:
FA 1: MD 955
FA 2: MD 975
FA 3: MD 995
• The NC automatically resets the signal when the current acceleration falls below 7/8 of the
warning threshold (hysteresis behaviour).
• Also see SYNCHRONISM COARSE/FINE and MAXIMUM ACCELERATION.
FA 1: m=0
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Siemens AG 1991 All Rights Reserved
SINUMERIK 880 (PJ)
FA 2: m=4
6ZB5 410-0HE02
7 ELG-Specific Signals (DB 29)
7.2 Signals from ELG (DB 29)
DW m, bit 4
DW m, bit 3
FA 3: m=8
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7 7