Switch Channel - Siemens SINUMERIK 840D Operator's Manual

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03.04

2.6.7 Switch channel

Channel status
Ó Siemens AG, 2004. All rights reserved
SINUMERIK 840D/840Di/810D Operator's Guide HMI Advanced (BAD) – 03.04 Edition
2.6 General sequence of operation
It is possible to switch between channels when several are in use.
Since individual channels may be assigned to different mode
groups, a channel switchover command is also an implicit mode
switchover command.
If the selected channel is linked to another NCU (m:n link), the HMI
Advanced is also switched over implicitly to the relevant NCU.
When a "Channel menu" is configured, all existing communication
links to other NCUs plus the associated channels are displayed on
softkeys.
The following three channel states can occur in each mode:
1. Channel reset
The machine is in the initial state, e.g. after power-on or after end
of program. The initial state is defined by the machine-tool
manufacturer in the PLC program.
2. Channel active
A program has been started, the program is being executed or a
reference point approach is in progress.
3. Channel interrupted
The running program or reference point approach has been
interrupted.
In this context a program can be a main program, subprogram, cycle
or a series of NC blocks.
There are 3 different switchover levels:
1. Switch to next channel.
2. Switch over configured channel group/channels (1 NC).
3. Switch to another NC (with m:n link involving several NCs).
Operator Components/Sequence of Operations
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