Siemens SINUMERIK 840D sl Function Manual page 1223

Explanation of formal parameters
The table below shows all formal parameters of the "Transfer" function.
Signal
Enable
Funct
S7Var
IVAR1
IVAR2
Error
ErrCode
Functions
1: Signals for synchronized actions to channel:
2: Signals for synchronized actions from channel:
Synchronized actions can be disabled or enabled by the PLC.
The data area is stored on the user interface in DB21 to DB30.DBB 300..307 (to channel)
and DBB 308..315 (from channel). The parameter "S7Var" is not evaluated for this function,
but must be assigned an actual parameter (see call example). The data are transferred
to/from the NC as soon as FC 21 is processed.
The following signals are relevant:
Signal
Enable
Funct
S7Var
IVAR1
Error
ErrCode
Basic logic functions: PLC Basic program powerline (P3 pl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Type Type Value range
I BOOL
I BYTE 1.. 7
I ANY S7 data storage area
I INT 0..
I INT 1..
A BOOL
A INT
Type Type Value range
I BOOL
I BYTE 1, 2
I ANY S7 data storage area
I INT 1..MaxChannel
A BOOL
A INT
Detailed description
2.12 Block descriptions
Remark
1 = FC 21 active
1: Synchronized actions to channel
2: Synchronized actions from
channel
3: Read data
4: Write data
5: Control signals to channel
6, 7: Control signals to axis
Depends on "Funct"
Depends on "Funct"
Depends on "Funct"
Depends on "Funct"
Remark
1 = FC 21 active
1: Synchronized actions to channel
2: Synchronized actions from
channel
Not used
Channel number
1 : "Funct" invalid
10: Channel no. invalid
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