Frame Chain Frames; Overview; Settable Frames $P_Uifr[N] - Siemens SINUMERIK 828D Function Manual

K2: Axis Types, Coordinate Systems, Frames
10.5 Frames
10.5.5

Frame chain frames

10.5.5.1

Overview

There are up to four frame variants:
• Settable frames (G500,G54 to G599)
• Basic frames
• Programmable frame
• System frames
10.5.5.2

Settable frames $P_UIFR[n]

The number of NCU global settable frames is set through the following machine data:
MD18601 $MN_MM_NUM_GLOBAL_USER_FRAMES (number of global, pre-defined user frames (SRAM))
The number can be between 0 and 100. If the MD has a value greater than zero, there are only NCU global
settable frames, otherwise the following machine data specifies the number of channel-specific settable frames:
MD28080 $MC_MM_NUM_USER_FRAMES (number of settable frames (SRAM))
System variable $P_UIFR[n] can be used to read and write the frame field elements. The frame is not activated
simultaneously when writing a field element, but rather activation only takes place on execution of a G500,G54,
to G599 instruction. For NCU global frames, the changed frame only becomes active in those channels of the
NCU, which execute a G500,G54 to G599 instruction. The variable is used primarily for storing write operations
from HMI or PLC. These frame variables are saved by the data backup.
Current settable frame $P_IFRAME
The predefined frame variable $P_IFRAME can be used to read and write the current settable frame, which is
valid in the channel, in the part program. The written settable frame is immediately included in the calculation. In
the case of NCU global settable frames, the modified frame acts only in the channel in which the frame was
programmed. If the frame is to be modified for all channels of an NCU, $P_UIFR[n] and $P_IFRAME must be
written simultaneously. The other channels must then activate the corresponding frame, e.g., with G54.
Programming of settable frames
Settable frames can be read and written via the part program and via the OPI by operator actions and by the
PLC. However, only data management frames can be written by the OPI. The index of the active settable frame
can be ascertained via the $P_UIFRNUM system variable.
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Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions