Miscellaneous Points Regarding Gantry Axes - Siemens SINUMERIK 808D Function Manual

The following table shows the effect of individual interface signals (from PLC to axis) on gantry axes:
PLC interface signal
Axis/spindle disable
Position measuring system 1
Controller enable
Delete distance to go (axial)
Clamping in progress
Feed stop
Hardware limit switch minus/plus
2. Hardware limit switch minus/plus
Select drive parameter set
Enable Pulses
Either the "Follow-up" state (IS of one gantry axis = 1) or the "Stop" state (IS of all gantry axes = 0) is activated for all gantry
axes, depending on interface signal:
DB380x.DBX0001.4 (follow-up mode)
b) Axial interface signals from axis to PLC (NCK → PLC)
Each of the axial, axis-to-PLC interface signals for the synchronized axis and the leading axis is always set on an axis-
specific basis and output to the PLC.
Exception:
When the leading axis is being traversed, the interface signals are also set for the synchronized axis:
DB390x.DBX0004.6/.7 (traverse command minus/plus)
7.6

Miscellaneous points regarding gantry axes

Manual travel
It is not possible to traverse a synchronized axis directly by hand in "JOG" mode. Traverse commands entered via the
traversing keys of the synchronized axis are ignored internally in the control. Rotation of the handwheel for the synchronized
axis has no effect either.
Handwheel override
An overriding motion by means of the handwheel can only be applied to the leading axis in coupled axis mode. In this case,
the synchronized axes traverse in synchronism with the leading axis.
Programming in part program
Only the leading axis of a gantry axis grouping may be programmed in the part program. An alarm is generated while
programming a synchronized axis, even when a gantry axis grouping is separated.
PRESET
The PRESET function can only be applied to the leading axis. All axes in the gantry grouping are reevaluated internally in
the control when PRESET is activated. The gantry axis then loses their reference and synchronization:
DB390x.DBX5005.5 = 0 (gantry grouping is synchronized)
Default for RESET
In an active gantry grouping, the following MD parameterization is ignored for the synchronized axes:
MD30450 IS_CONCURRENT_POS_AX=1 (reset default: neutral axis/channel axis)
The state of the leading axis is assumed. The user is informed about the inappropriate configuration with display alarm 4300.
54
Address Effect on
Leading axis
DB380x.DBX0001.3 On all axes in gantry
grouping
DB380x.DBX0001.4 Axial
DB380x.DBX0002.1 On all axes in gantry grouping
DB380x.DBX0002.2 Axial
DB380x.DBX0002.3 Axial
DB380x.DBX0004.4 On all axes in gantry grouping
DB380x.DBX1000.0 Axial alarm: Brake request on all axes in gantry
/.1 grouping
DB380x.DBX1000.2 Axial
/.3
DB380x.DBX4001.0 Axial
- .2
DB380x.DBX4001.7 Axial
Synchronized axis
No effect
Axial
No effect
Axial
Axial
Axial
Axial
Function Manual
01/2017