Siemens TIM 1531 IRC, Руководство по эксплуатации

Страница: 220 / 338

Block library TeleControl ST7
5.7 Master copies
TIM 1531 IRC
220
Operating Instructions, 02/2018, C79000-G8976-C468-02
Explanation: Setpoint input
How a setpoint available at SetpointInput is processed depends on whether it
is a hardware or software input. You specify the type of input with the "Contin-
uousEnterFunct" parameter:
•
ContinuousEnterFunct = FALSE (hardware input)
A setpoint at "SetpointInput" is only read in as long as the signal is 1 at
"EnterInput". The setpoint that is read in is then transferred 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).
A further setpoint is then only read in again by the FB when a 0 signal was
detected at EnterInput for at least one OB1 cycle.
When a 1-out-of-n error is detected at the hardware input, the entered
setpoint is no longer processed. A new setpoint is read in again only when
previously for the length of an OB1 cycle in the CPU, no hardware input via
a command, setpoint or parameter block was detected.
The FB enters the detected 1-out-of-n error in the diagnostics buffer (event
ID B172). As long as the error remains, the error status is indicated via the
"InputError" output of FC Safe (see FC Safe, "InputError" parameter).
•
ContinuousEnterFunct = TRUE (software input)
A setpoint at SetpointInput is read in continuously and checked for
changes. Changes are checked by comparison with the last setpoint that
was transferred. The setpoint is sent immediately every time a change
occurs unless the 1-out-of-n check detects an error.
– With hardware input (see EnterInput) an empty cycle must be detected
before a new setpoint can be transferred by the block.
– With software input a new setpoint can be transferred in every OB1
cycle. This assumes that there is no other software entry by another
block pending in this cycle. Otherwise a 1-out-of-n error is detected.
A new transfer of the software setpoint can be triggered via the
"SendSoftSetpoint" input even when the software input has not
changed (see below).
When a 1-out-of-n error is detected at the software input, the entered
setpoint is no longer processed.
A new setpoint is read in again only when previously for the length of an
OB1 cycle in the CPU, no software input (command or setpoint) was
detected. The block enters detected 1-out-of-n errors in the diagnostics
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
further details, refer to the description of FC Safe.
Parameter: ReturnedSetpoint
Declaration: OUTPUT
Data type:
WORD