Siemens SINUMERIK 840Di Function Manual page 1144

Detailed description
2.12 Block descriptions
6: Update control signals to axes:
The purpose of function 6 is to transmit important control signals at high speed in between
cyclic data transfers. Data byte 2 of application interface DB31 to DB61 is transferred to the
NC. The transfer is performed for all activated axes. This allows the servo enable to be
transferred outside the PLC cycle, for example.
The following signals are relevant:
Signal
Enable
Funct
S7Var
IVAR1
Error
ErrCode
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. 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
Enable
Funct
S7Var
IVAR1
Error
ErrCode
2.12.26 FC 22: TM_DIR direction selection for tool management
Description of functions
The block TM_DIR provides the shortest path for positioning a magazine or a revolver based
on the actual and setpoint position.
As long as a 1 signal is applied to the Start input, all output parameters are updated
cyclically. Changes can be made to input parameters (e.g., position values) in subsequent
PLC cycles.
The output signals are undefined when the start signal is at 0 level.
2-232
I/O Type Value range
I Bool
I Byte 6
I Any S7 data storage area
I Int 0
Q Bool
Q Int
I/O Type Value range
I Bool
I Byte 7
I Any S7 data storage area
I Int 0
Q Bool
Q Int
Remarks
1= FC 21 active
6: Control signals to axes
Not used
1: "Funct" invalid
Remarks
1= FC 21 active
7: Control signals to axes
Not used
1: "Funct" invalid
Power Line Basic PLC Program (P3)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0