Muting signal from the machine control system:
(Mutingsignal available from the contactor position control of the working stroke valve, from the pressure switch
or from the AMS)
The muting signal out of the machine control must be laid out in a way that no muting signal is given to
AKAS®
if there is any malfunction of the involved switching elements (i.e. no release of a contactor or
no switching over from fast motion into working motion) !
The set up operation has to be carried out according to the description in chapter 6.5.1 function 7 on the AKAS
....F systems, or the AKAS® must be switched off, the safety outputs of the AKAS® (OSSDs) must be muted,
and the fast speed closing speed must be reliably excluded.
After the set up operation it must be made sure that this special muting of the OSSDs is cancelled.
Electrical connections - Description / Wiring diagrams
31
Muting signal
set up operation
Checkliste
6
Directions for the integration into the machine control system
6.2
Doku Nr. 988 Stand 3.2.2016 / Aui
1
AKAS® is used on "foot operated fast motion" mode.
2
3
"Foot operated fast motion" should only be possible with activated AKAS®
During foot operated motion with AKAS®, the downward movement should only happen by
pressing the foot pedal .
(The above-mentioned foot switch, must be a 3 position safety foot switch.)
4
5
6
7
The valves relevant for the downward movement must be triggered as directly as possible by
the Fail-Safe PNP outputs OSSD1 and OSSD2 to keep the overrun traverse as short as possi-
ble
In all operating modes except "Foot operated fast motion" the AKAS® must be disconnected
from the power supply (=switched off).
The machine control system issues a muting signal with AKAS®-LC...: 23mm above the slug
, and with AKAS®-II..., AKAS®-3...: value according the table 19/1 above the slug.
(Mutingsignal coming from the contactor position control of the working stroke valve, from the
pressure switch or from the AMS)
At the AKAS®-3... system, the machine control system is in a position to carry out 2 different
switch-over points from fast speed into slow speed for the bending of plane metal sheets or for
the bending of box-shaped products . The selection of the respective switch-over points is re-
alized by a static signal issued by the AKAS®. (HUSP)
8
9
10
11
The machine control system prevents the fast speed during the closing movement if no static
signal is given (SGA). This function of the press must not be necessarily safety-orientated.
When the muting signal is given, it must be guaranteed according to safety class 4 that the
stroke of the machine is < 10mm/s.
The box-bending function must be chosen and acknowledged by a button (change-over con-
tact). Here a pedal is more advantageous, because by using it both hands stay free to hold the
sheet.
After a voltage reset, an overrun traverse test is carried out.
12
The overrun traverse is smaller than 15 mm at the AKAS®-LC....., i.e. smaller than the value
indicated in table 19/1 for AKAS®-II... and AKAS®-3....
OK
FIESSLER
E L E K T R O N I K
