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 (Z109.1– = -4) only. The
function is activated by Z18.9– 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 (Z109.1– = -4) only.
The function is activated by Z18.9– Controller options bit 2 = 1.
NOTE!
The parameter Z111.6– Interpolation mode must be set to mode 0 (extrapolation) at
the external feedforward. The fieldbus cycle time (Z131.18–) must correspond to the
controller cycle (Z1.8–) 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
Z111.7– 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 Z121.11–,
m the stop by parameter Z108.1– Control word bit 8,
m actual speed value synchronization after switching on.
NOTE!
The feedforward is activated via the bit 2 in Z18.9–, assumed that bit 1 in Z18.9–
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 Z111.7–
.
To Next Page
Loading...