Festo Кабели и принадлежности User Manual
Page 344
7. Description of the commands
7−78
Festo P.BE−SPC200−EN en 0901d
M39
Output valve positioning value
1)
ć pneumatic axis; ć permitted in operating mode: Start/Stop
Nn M39 X<Positioning value> [Y.., Z.., U..]
<Positio-
ning
l
n
1)
Valve positioning value in % of the range 0...10 V:
1 = 1 % ... 99 = 99 %
n = 1 ... 99
value>
Rn
1)
Valve positioning value in % saved in register Rn
n = 1 ... 99
Effect
With command M39, the controller of the SPC200 will be deactivated and the proĆ
portional directional control valve will be controlled directly. Whilst the drive is
standing still, a pressing force, e.g. against a work item, may be generated.
With the positioning value you can specify the valve nominal voltage (0.1 ... 9.9 V)
which is to be output. At approx. 5 V (50 %) the valve slide is in the mid−position
(see following table). The positioning value controls the flow of the valve and deterĆ
mines the pressure increase time up to the maximum pressure (supply pressure).
Command M39 remains active until it is deactivated with command M12 or until
the stroke limit value (M40), the software end positions or the speed limit value
(M41) are exceeded.
Example
N018 G01 X400 FX0
N019 G01 X420 FX5
N020 #TI2.0 30
N021 M40 X2.00
N022 M41 X0.15
N023 M39 X60
N024 #TNI2.1 24
N025 M12 X
...
N030 G01 X100 FX10
;Move quickly to pre−holding position
;Move slowly to clamping position
;Jump output of valve positioning value
;Stroke limit value for M39 = 2 mm
;Speed limit value for M39 = 0.15 m/s
;Valve nominal value voltage = 4 V
;Wait for input signal
;Switch off M39
; ...
;... Further program sequence
Remark
Command M39 may only be accessed if no positioning command has been carried
out. Otherwise an appropriate fault will be triggered.
In order to avoid an uncontrolled movement, e.g. during incorrect programming,
the SPC200 monitors the position and the speed of the drive. Presetting for
monitoring:
Ĉ Stroke limit value = ±10.00 [mm] or ±10.00 [°]
Ĉ Speed value = 0.10 [m/s] or 0.1 [10
3
°/s]
The presettings can be modified with commands M40 and M41.
The monitoring of the software end positions remains active.
1)
This syntax is only available as from operating system version 4.6. Programs which contain this
syntax cannot be edited with control panel type SPC200−MMI−1... .