Technical data

SINAUT TD7 software package for the CPU
2.5 Data point typicals
Software
260 System Manual, 07/2009, C79000-G8976-C222-07
Range of
values:
Input words
Memory words
Data words
IW0 ... IWn
PIW0 ... PIWn
MW0 ... MWn
LW0 ... LWn
DBm.DBW0 ... n
How a setpoint available at SetpointInput is processed depends on whether
it is a hardware or software input. The user specifies the type of input with
the ContinuousEnterFunct parameter:
• ContinuousEnterFunct = FALSE (= hardware input)
The setpoint at SetpointInput is only read in as long as a 1 signal is
detected at EnterInput. The setpoint that is read in is then transmitted if
no error is detected during the 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).
The next setpoint is first read in by the FB when a 0 signal is detected for
at least one OB1 cycle at EnterInput.
If a 1-out-of-n error is detected the next time a value is applied to the
hardware input, the entered setpoint is no longer processed. A new
setpoint is first read in when no hardware input has been acquired in the
PLC for one OB1 cycle; in other words, not only for this block but also for
all other command and setpoint input blocks with hardware input. The FB
enters the detected 1-out-of-n error in the diagnostic buffer (event ID
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.
• ContinuousEnterFunct = TRUE (= software input)
The setpoint at SetpointInput is read in continuously and checked for
changes. The change evaluation is made by comparing the current with
the last setpoint that was sent. The setpoint is sent immediately every
time a change occurs unless the 1-out-of-n check detects an error.
Without the setpoint having changed, a new transmission of the software
setpoint can be triggered over the SendSoftSetpoint input (see below).
While for hardware input an empty cycle must be detected before a new
setpoint can be sent by the block, for software input a new setpoint can
be transmitted in every OB1 cycle. This is possible only when there is no
other software setpoint or software command in this cycle. Otherwise a 1-
out-of- n error is detected.
If a 1-out-of-n error is detected during the software input, the entered
setpoint is no longer processed. A new setpoint is first read in when no
software input has been acquired in the PLC for one OB1 cycle; in other
words, not only for this block but also for all other command and setpoint
blocks with software input. The FB enters the detected 1-out-of-n error in
the diagnostic buffer (event ID B172). Appropriate error bits are also set
in the central data block "BasicData" where they can be queried by the
software. For more detailed information, refer to the description of FC
Safe.
Name: ReturnedSetpoint
Declaration: OUTPUT