Plc Axis Control; Overview - Siemens SINUMERIK 828D Function Manual

Interface to HMI.
The PLC can transfer eight messages or alarms for display on the HMI, which are displayed in the sequence that
they occur.
When additional messages/alarms occur, the first seven are kept in the HMI, and the latest message or the latest
alarm is displaced from one that has just occurred according to the following rules:
• System message/alarm displaces user message/alarm
• Messages/alarms with a higher priority displace those of a lower priority.
The first seven messages/alarms are kept in the display because it is very probable that these define the cause
of the problem and the following are just of a secondary nature. However, if one or several messages/alarms are
acknowledged and therefore cleared, then a corresponding number of alarms/messages that have been received
move up in the HMI.
14.6.4

PLC axis control

14.6.4.1

Overview

Target
The PLC can control eight axes or spindles via data blocks of the user interface; the axis/spindle is specified by
its DB number:
• DB380x PLC → NCK interface
• DB390x NCK → PLC interface
• DB390x Axis index: 0 ≤ x ≤ 7, whereby axis index = axis number-1
The following functions are supported:
• Positioning axes
• Spindle positioning
• Rotate spindle
• Oscillate spindle
• Indexing axes
References:
• Function Manual, Extended Functions; Positioning Axes (P2) and Indexing axes (T1)
• Function Manual, Basic Functions; Spindles (S1)
Precondition
The axis to be controlled must be assigned to the PLC. An axis can be interchanged between NC and PLC using
Axis interchange
the user interface "
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
" (DB3800.DBB8/DB3900.DBB8).
P4: PLC for SINUMERIK 828D
14.6 Function interface
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