Baumuller b maXX BM5800, Parameter Manual

Page: 351 / 816

Description of the Software Modules and Parameters
Parameter manual b maXX BM5800
Document No.: 5.16029.03
351
of 814
3
111.7
External speed feedforward
This parameter permits the presetting of an external speed feedforward by a fieldbus.
This parameter takes effect in operating mode Position control (
Z
109.1
–
= -4) only. The
function is activated by
Z
18.9
–
Controller options bit 3 = 1.
111.8
External acceleration feedforward
This parameter permits the presetting of an external acceleration feedforward by a field-
bus.
This parameter takes effect in the operating mode Position control (
Z
109.1
–
= -4) only.
The function is activated by
Z
18.9
–
Controller options bit 2 = 1.
NOTE!
The parameter
Z
111.6
–
Interpolation mode must be set to mode 0 (extrapolation) at
the external feedforward. The fieldbus cycle time (
Z
131.18
–
) must correspond to the
controller cycle (
Z
1.8
–
) in order to achieve an optimum result.
NOTICE!
The following functions are not applicable at an activated, external feedforward con-
trol value in the operating mode Position control because the dominating, external
speed control value
Z
111.7
–
is superimposing its reaction:
m
Hardware and software limit switch monitoring, if the error reaction does not result
in a pulse block,
m
the speed limit
Z
121.11
–
,
m
the stop by parameter
Z
108.1
–
Control word bit 8,
m
actual speed value synchronization after switching on.
NOTE!
The feedforward is activated via the bit 2 in
Z
18.9
–
, assumed that bit 1 in
Z
18.9
–
was set to 0! Refer to Tabelle , “Feedforward modes in position controlled operating
modes,” auf Seite 425. The same notes and warnings apply as described in
Z
111.7
–
.