User guide

5 Function blocks
5.2 L_CamContactor - cam group with switch-on and switch-off dynamisation
146
Lenze · 9400 function library · Reference manual · DMS 6.7 EN · 08/2014 · TD05
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5.2.5 Dynamic displacement of the cams
In C05521 and C05522 a time displacement of the switch-on and switch-off positions can be set for
the cams, e. g. to implement a compensation of delay times of switching elements connected.
• A positive time period causes the cam to be switched earlier, a negative time period accordingly
causes the switching operation to occur later.
• For position-time cams only a time displacement of the switch-on position is effected via
C05521; the setting in C05522 has no effect.
• Dynamic cam sampling is limited by the half-cycle period. If the limitation is activated, the
bError output is set to TRUE and the limitation is signalled via error bit 15 in C05529.
[5-8] Displacement of the switch-on and switch-off position for different speeds
5.2.6 Selection of the cam data
The contactor data can either be part of the cam data available in the memory module or be deter-
mined by a master control via PDOs or SDOs.
• If the FB uses the contactor data stored in the memory module, the corresponding track number
must be determined in the dnTrackNumber input.
•The FBL_CamSetContDataPDO
serves to determine the contactor data via inputs/PDOs. The
contactor data are transferred to the FB L_CamContactor via the ContactorData input (see fig.
[5-9]
).
•The FBL_CamSetContDataSDO
serves to determine the contactor data via inputs/SDOs. The
contactor data are transferred to the FB L_CamContactor via the ContactorData input (see fig.
[5-10]
).
 Positive time displacement of the switch-on position (causes earlier switch-on)
 Negative time displacement of the switch-off position (causes late switch-off)
bOut
dnPosIn_p
t
t
 
Speed A Speed 2 * A

 Note!
If the inputs dnTrackNumber and ContactorData are assigned simultaneously, the con-
tactor data transferred via the ContactorData input is used. If this connection is separa-
ted, it is changed over to the contactor data stored in the memory module.