Frequency (Whenever, From, When, Every) - Siemens SINUMERIK 828D Function Manual

Identification numbers
If several synchronized actions are to be active in parallel in a channel, their identification
numbers
replace each other within a channel.
Sequence of execution
Modal and static synchronized actions are executed in the order of their identification
numbers
Non-modal synchronized actions are executed after execution of the modal synchronized
actions in the order of their programming.
Coordination via part programs and synchronized actions
Synchronized actions can be coordinated via part programs and synchronized actions based
on the identification numbers
synchronized action (LOCK, UNLOCK, RESET, CANCEL) (Page 126)").
Coordination via PLC
Synchronized actions with identification numbers
coordinated via the NC/PLC interface from the PLC user program (see Section "Coordination
via PLC (Page 127)").
2.2.2

Frequency (WHENEVER, FROM, WHEN, EVERY)

The frequency specifies how often the condition is queried and, when the condition is
fulfilled, how often the action should be executed. The frequency is part of the condition.
Frequency Meaning
"No specification" If no frequency is specified, the action is executed cyclically in every interpolation cycle.
WHENEVER If the condition is fulfilled, the action is executed cyclically in every interpolation cycle.
FROM After the condition has been fulfilled once, the action is executed cyclically in every interpolation clock
cycle for as long as the synchronized action is active.
WHEN If the condition is fulfilled, the action is executed once and then the condition is no longer checked.
EVERY At every state change of the condition from FALSE to TRUE (rising edge), the action is executed
once.
See also
Technology cycles (Page 119)
Synchronized actions
Function Manual, 07/2012, 6FC5397-5BP40-3BA0
/ must be different. Synchronized actions with the same identification number
ID IDS
/ .
ID IDS
/
ID
2.2 Components of synchronized actions
(see Section "Coordination via part program and
IDS
/
ID IDS
Detailed description
in the range from 1 to 64 can be
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