Force Limitation - Siemens SINUMERIK 840D Description Of Functions

4 Firmware Drive Functions
4.4 Closed-loop force control
4.4.1

Force limitation

5230
FORCE_LIMIT_THRESHOLD [n]
Force limitation tolerance band about weight
Unit: Default:
N 10000.0
5231
FORCE_LIMIT_WEIGHT [n]
Weight force limitation
Unit: Default:
N 0.0
4-118
SINUMERIK 840D/SIMODRIVE 611 digital Descr. of Functions HLA Module (FBHLA) – 04.00 Edition
FFA
0
F
F
0
Mode
F
contr. on
0
Fig. 4-12 Force limitation 2
Deselection of closed-loop force control by deactivating function "Travel to fixed
stop" bit.
Force limitation tolerance band (plus/minus) about force of weight and weight
force limitation.
0...7 index of the parameter set
Minimum: Maximum:
0.0 100000000.0
0...7 index of the parameter set
Minimum: Maximum:
–100000000.0 100000000.0
If a pressure sensor is installed and connected for the pressures at A and B, the
force limitation in MD 5241 can be activated.
The force controller then ensures that the cylinder force is limited to the
relevant values if it is threatening to exceed the value set in MD 5230 plus force
of weight (MD 5231) or to drop below the force of weight value (MD 5231) minus
the setting in MD 5230.
Since only the cylinder force is measured and regulated, it may be necessary to
allow for the force of weight in MD 5231 and the friction force in MD 5230.
An additional force limitation value with the same effect as MD 5230 can be in-
put by the NC, e.g. on travel to fixed stop. The lower of the two force limitation
values is then applied.
act
F
limit
Relevant for:
HLA
Data type:
FLOAT
Relevant for:
HLA
Data type:
FLOAT
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02.99
t
t
t
Cross ref.: –
Protection level:
3/3
Effective:
Immediately
Cross ref.: –
Protection level:
3/3
Effective:
Immediately