R
02/92
Operating Instructions
2.3
Possible Interrupts (Alarms)
Interrupts can be allocated to the following values by an entry into a data block
(IP
241):
● For each initial track value (of a cam)
An interrupt is triggered only when the initial value is reached or exceeded from any travers-
ing direction.
+
This is used when the cam triggers a quick reaction at the start, but not at the end.
Example: Acoolantpump
isswitchedonrapidly.
his
notnecessarytointerruptthe cyclic program
toturnthispurnp
off.
● For each track end value (of a cam)
An interrupt is triggered only when the end value is reached or exceeded from any traversing
direction.
+
This is used when the cam triggers a quick reaction at the end, but not at the start.
Example: The forward movement of a milling head is not necessarily started by an interruption of a cyclic program;
however, a quick stop is required at the end position.
● For each track (of each cam) initial and end value
An interrupt is triggered when the initial and end value is reached or exceeded.
-t This is used when, independently from the traversing direction, a quick reaction is re-
quired at both ends of the cam.
Example: A valve is closed very quickly from both traversing directions.
● With the NV value an additional interrupt can be allocated to the zero shift in the data
block
(IP 241).
– The first synchronization causes an interrupt.
– Each subsequent synchronization with the same NV value causes no interrupt in ro-
tary axis mode and in linear axis mode.
Example: A material conveyor
isactivatedvery
rapidlywhen
anew reference point is transferred
byspecifyingthezero
shift.
For enabled interrupts the module “automatically” generates an interrupt under
the following circumstances:
– during the reparameterization of set values
– during synchronization of software or hardware
- during deleting with B bit (see section 9.6)
If this is not desired, you can use the new functions in section 1.12.
IP
241 Equipment Manual
@
Siemens
AG
1989, Order No.: 6ES5
998-0KD21
2–3
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