Technical data

SINAUT TD7 software package for the CPU
2.5 Data point typicals
Software
254 System Manual, 07/2009, C79000-G8976-C222-07
Range of
values:
Input byte
Memory bytes
Data bytes
IB0 ... IBn
PIB0 ... PIBn
MB0 ... MBn
LB0 ... LBn
DBm.DBB0 ... n
This command input byte is specially designed for entering commands using
hardware, i.e. over digital inputs. Input using memory or data bytes is also
possible, but the user must then make sure that the command at the input
byte is reset, which occurs at the hardware level when the command button
is released.
When input is detected, the command is transmitted if no error is detected
during the 1-out-of-8 and 1-out-of-n check, and if the central enable memory
bit is set. This is automatically set by FC Safe following a selected time delay
set there (see FC Safe, InputDelayTime parameter).
If a 1-out-of-8 or 1-out-of-n error is detected, the entered command is no
longer processed. A new command is first read in when no hardware
command has been acquired in the PLC for one OB1 cycle; in other words,
not only for this block but also for all other command input blocks with
hardware input. The FB enters the detected 1- out-of-8- or 1-out-of-n error in
the diagnostic buffer (event ID B171 or B172). The error status is also
indicated over the InputError output of FC Safe (see FC Safe, InputError
parameter) and continues to be indicated as long as the error remains.
Name: CommandInputByte_SW
Declaration: IN_OUT
Data type BYTE
Default: 0 (B#16#0)
Explanation Command input byte for software input.