Siemens SIMATIC FM 452 Manual page 93

8.8 Interrupt Enable
Definition
You can decide whether hardware interrupts are generated when certain events
occur (see Section 6.1, Page 6-2).
Cam on/off
In the cam data, you can specify where the hardware interrupts are generated
when cams 0 to 7 are activated and/or deactivated (see Section 8.9,
Page 8-26).
Measurement starts
With the "edge detection" setting, a rising edge at digital input I1 can trigger a
hardware interrupt.
Measurement completed
Both with the "edge detection" setting and with the "length measurement"
setting, a falling edge at digital input I1 can trigger a hardware interrupt.
Machine Data for Interrupt Enable in the Parameter DB
Address Name
(absolute)
3.1 PI_MEND
3.2 PI_CAM
3.5 PI_MSTRT
Cam Data for Interrupt Enable in the Parameter DB
Address Name
(relative)
+0.4 PI_SW_ON
+0.5 PI_SW_OFF
FM 452 Electronic Cam Controller
C79000-G7076-C452-04
Type Initial Value
BOOL FALSE
BOOL FALSE
BOOL FALSE
Type Initial Value
BOOL FALSE
BOOL FALSE
Machine Data and Cam Data
Comment
1 = enable hardware interrupt: measurement end
1 = enable hardware interrupt: cam on/off
1 = enable hardware interrupt: measurement start
Comment
1 = hardware interrupt on activation
1 = hardware interrupt on deactivation
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