Phoenix Contact INTERBUS - Page 56

50 5756B
Standard Function Parameter Register
Some standard functions require the entry of a parameter for
function execution. In general, this parameter is the number
of the bus device. The device number consists of the bus
segment and position. The device number file is given in
binary in the 16-bit standard function parameter register.
Example: Device number 2.3
Figure 33 Transferring the device number in the standard
function parameter register
System Control
Initiating, monitoring, and terminating a function must be
integrated into the application program.
The two following diagrams illustrate the sequence of a
function execution with and without parameter transfer.
Figure 34 Sequence of a function execution without
parameter transfer
1. The control program activates the function using the
standard function start bit.
Bus segment: 2
dec
00000010
bin
Position in the
segment:
3
dec
00000011
bin
707 0
P o s itio n in s e g m e n tBus segm ent
00000010 00000011
Bit position
5469A012
O u tp u t b it
Q 261.0
In p u t b it
I 265.0
In p u t b it
I 256.2
Standard function
s ta rt b it
Standard function
re s u lt b it
12 3 4
Standard function
s ta tu s b it
5756A031