Detailed description
2.12 Block descriptions
Basic logic functions: PLC Basic program powerline (P3 pl)
246 Function Manual, 11/2006, 6FC5397-0BP10-2BA0
7: Update control signals to axes:
The purpose of function 7 is to transmit important control signals at high speed in between
cyclic data transfers. The data byte 4 of application interface DB31 to DB61 is transferred to
the NC. The transfer is performed for all activated axes. This function can be used, for
example, to transfer a feed stop outside the PLC cycle.
The following signals are relevant:
Signal Type Type Value range Remark
Enable I BOOL 1= FC 21 active
Funct I BYTE 7 7: Control signals to axes
S7Var I ANY S7 data storage area Not used
IVAR1 I INT 0
Error A BOOL
ErrCode A INT 1: "Funct" invalid
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