Siemens SIMATIC FM 452, Руководство пользователя

Страница: 95 / 210

Machine Data and Cam Data
8-27
FM 452 Electronic Cam Controller
C79000-G7076-C452-04
No. Time cam Distance cam Description
5
A cam is approached and
left in any direction; both
directions are set as the
activation direction.
CS
CE CS
x
t1
On time
t2
t3
On time x = t1 + t2 + t3
Set cam Switched cam
Cam Data in the Parameter DB
Address
(relative)
Name Type Initial Value Comment
+0.0 CAMVALID BOOL FALSE 1 = cam valid
+0.1 EFFDIR_P BOOL TRUE 1 = activation direction positive (plus)
+0.2 EFFDIR_M BOOL TRUE 1 = activation direction negative (minus)
+0.3 CAM_TYPE BOOL FALSE 0 = distance cam
1 = time cam
+0.4 PI_SW_ON BOOL FALSE 1 = hardware interrupt on activation
+0.5 PI_SW_OFF BOOL FALSE 1 = hardware interrupt on deactivation
+1.0 TRACK_NO BYTE B#16#0 Track number
Range: 0 to 31
Note:
Unused cams should always be set to “invalid” (CAMVALID = FALSE).
Activation direction
Two activation directions are possible:
positive: The cam is activated at the cam start when the axis is moving in the direction of ascending
actual values.
negative: The cam is activated at the cam end when the axis is moving in the direction of
descending actual values.
You can also set both activation directions at the same time.
Track number
With the track number, you define the track with which each cam is effective.