Siemens SINUMERIK 840Di Function Manual page 533

Brief Description
1.1 Brief description
1.1
Channel
An NC channel represents the smallest unit for manual traversing of axes and automatic
processing of part programs. At any one time, a channel will always be in a particular mode,
e.g., AUTOMATIC, MDA, or JOG. A channel can be regarded as an independent NC.
Mode group
A channel always belongs to a mode group. A mode group can also consist of several
channels. A mode group can be identified by the fact that all channels of the mode group are
always in the same mode at a particular time, e.g., AUTOMATIC, MDA, or JOG. This is
ensured by the internal mode logic of the NC.
A mode group can be regarded as an independent multi-channel NC.
Channel gaps
When channels are configured, placeholder channels can be provided in order to create as
uniform a configuration as possible over machines in a series. Only the channels that are
actually used are then activated.
Program test
For purposes of testing or breaking in a new part program, the following options are available
for reducing critical situations while still in the testing phase:
• Program execution without setpoint outputs
• Program execution in singleblock mode
• Program execution with dry run feedrate
• Skip part program blocks
• Block search with or without calculation.
Mode Group, Channel, Program Operation, Reset Response (K1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
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