Siemens SIMATIC TIM 3V-IE DNP3, System Manual

Page: 191 / 354

The SINAUT Configuration Tool
6.6 TD7onTIM
TIM DNP3
System Manual, 12/2015, C79000-G8976-C253-04
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OpInputMonitor
OpInputMonitor indicates the status of operator input to the CPU when a command, setpoint
or parameter is input. The current status can be displayed to the operator for each user
program in a suitable form, for example using the LEDs, on an operator panel etc.
Note
OpInputMonitor is not normally used when using DNP3.
The OpInputMonitor system object can only be included once per subscriber with TD7onTIM.
TD7onTIM should therefore have the OpInputMonitor system object added when one or
more of the following objects is used with this TD7onTIM:
● Set01W_S (Setpoint object for send direction)
● Par12D_S (Parameter object for send direction)
Check for the input time of hardware inputs
The OpInputMonitor is recommended particularly when commands are entered over digital
inputs, for example using buttons connected to them. This also applies to the situation when
setpoint and parameter entries are transmitted as the result of the send trigger signal and
when this triggering is over a digital input, for example, once again using a button.
Using OpInputMonitor reduces the risk of incorrect input when the entries are made over
digital inputs. For these inputs, the "minimum input time" can be specified for
OpInputMonitor, in other words, the button must be pressed for the minimum time.
Accidental activation of a button does not then lead to unwanted command, setpoint or
parameter transfer. When the minimum input time has elapsed and the button can be
released, OpInputMonitor indicates this with its status byte for operator input in the "Input
OK" bit.
Apart from the minimum duration, the "maximum input time" can also be set for digital inputs.
This allows a button that is sticking or defective digital inputs that supply a permanent 1
signal to be detected in good time. Such errors are once again indicated in the status byte
for operator input of OpInputMonitor, in this case in the "Input error" bit.
The two times and the code bits mentioned above are relevant only for operator input over
digital inputs.
1-out-of-n check of memory bit, DB and hardware input
For all types of operator input, in other words both for input via digital inputs as well as input
via the memory or data blocks, OpInputMonitor also returns the error status 1 out-of-n error.
It is set when TD7onTIM has detected that there is more than 1 operator entry pending
within a fast read cycle (input error):
● If there is only 1 operator entry pending, the entry will be processed and transferred.
● If there is more than one entry, the entries are rejected (double input lock).
A new setpoint or parameter is processed only when previously no entry was acquired in
at least 1 fast cycle.
If increased reliability is required for the input of commands, setpoints and parameters, all
objects with which this data is sent must be assigned to the fast read cycle (see Data