Siemens SIMATIC FM 453 Manual page 208

Description of Functions
Table 9-2 Checkback Signals, continued
Symbol
Significance Significance
English German
FAVEL FIWS Set actual
value on-the-
fly complete
NUM_MF MNR M function
number
STR_MF AMF Change M
function
POS_ROD PEH Position
reached, Stop
("PEH")
9-8
Function Function
... set Actual value on-the-fly is executed.
The signal is reset when "Set actual value on-the-fly" is activated (see
Section 9.3.6).
M command 0...99
... is indicated simultaneously with the M function number.
If M functions are programmed in a traversing block, their output is
signaled by setting "Change M function."
"Change M function" remains pending until:
– the specified time has expired, for time-controlled M functions
– the user has acknowledged, for acknowledgment-controlled M
functions.
When the preset target position is reached correctly, (PEH) is actu-
ated, and remains in effect until the next axis movement.
"Target position reached correctly" means that during approach of
the actual value to target position, a defined tolerance (PEH toler-
ance) must not be exceeded during a defined time (PEH time watch-
dog). If this is not the case, an error is signaled and positioning is
interrupted.
(PEH) is actuated only in the following modes and cases:
– Reference-point approach: If the reference point has been
reached in full (including reference-point shift).
– "MDI", "Incremental relative": If the preset position has been
reached.
– Automatic: If a traversing block has been positioned in full
and the axis remains motionless until the next traversing move-
ment.
It is not set if no synchronization is available yet.
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01