Siemens SINUMERIK 840Di Function Manual page 542

Detailed Description
2.2 Mode groups
• MDA
Applies to all modes
Cross-mode synchronized actions
Modal synchronized actions can be executed per IDS in all modes for the following functions
in parallel to the channel:
• Command axis functions
• Spindle functions
• Technology cycles
Selection
The user can select the desired operating mode by means of soft keys on the operator
interface.
This selection (AUTOMATIC, MDA, or JOG) is forwarded to interface signals:
DB11, ... DBX4.0 to DBX4.2 (mode strobe)
in the PLC, but is not activated at this point.
Activation and priorities
The required operating mode of the mode group is activated via interface signals:
DB11, ... DBX0.0 to DBX0.2 (operating mode).
If several modes are selected at the same time the priority is as follows:
• JOG (1st priority, high) (DB11, ... DBX0.2)
• MDA (2nd priority, medium) (DB11, ... DBX0.1)
• AUTOMATIC (3rd priority, low) (DB11, ... DBX0.0)
2-6
Manual Data Automatic (the NC blocks are entered via the operator panel)
– Restricted automatic execution of part programs and sections of part programs (can be
only one block or a sequence of blocks).
– Part program test
– A maximum of 1 channel per mode group can be active (applies only to TEACH IN)
– Axes can be manually traversed only in subordinate machine functions such as JOG,
REPOS or TEACH IN.
Mode Group, Channel, Program Operation, Reset Response (K1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0