Siemens SIMATIC FM 351 - Page 91

Modes and Jobs
9-5
FM 351 Positioning Module
C79000-G7076-C351-02
Target
–1000 mm 1000 mm0
Switchover difference plus
Switch-off difference plus
1
2
3
Stationary range
v
creep
4
5
t
m
Target reached: PEH is set
Stationary speed reached
t
m
= monitoring time
1
2
3
4
5
v
stationary speed
Figure 9-3 Final Target Approach of an Incremental Approach
4. You have set the following parameters:
– Target range (TRG_RANGE) = 0
– Stationary speed (ZSPEED_L) = 0
– Monitoring time (MON_TIME) > 0
PEH is generated when the target is reached.
PEH is not generated if the actual value does not reach the target within the
monitoring time.
Target
–1000 mm 1000 mm0
Switchover difference plus
Switch-off difference plus
1
2
3
Stationary range
v
creep
4
t
m
Target reached: PEH is set
t
m
= monitoring time
1
2
3
4
Figure 9-4 Final Target Approach of an Incremental Approach