User Manual

Logical I/O blocks
Output blocks
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Accumulator object (counter value)
The accumulator object can map counter states unchanged and free of errors
due to rounding off or add the counter pulse without loss and scale the same.
The accumulator object is suitable to displaying meter values that justify
monetary performance. For this type of counter values, manipulations such as
monthly values, etc., must never be made directly in the meter object.
The addition of counter pulses and scaling without loss is accomplished using
whole-number operations with residual value processing. The conversion of
physical pulses can be adapted using a presale parameter. The resulting
Present_Value is a scalable variable.
Present_Value depends on the function mode to synchronized adjustable to any
value using a physical meter with the last value prior to setting saved with a
date/time stamp.
19.3 Output blocks
An output block is the logical image or memory map of a command, and
describes its properties. Within the program, the Present Value is made
available to the block as a program value. The block converts the program value
and transmits the raw data to the physical I/O.
If an output is deleted from an existing system in the course of a modification,
the I/O module will retain the last valid value which it received from the system.
You can return the I/O channel to the default status by switching the power off
and on again. This problem can be avoided by performing a complete download.
Binary Output (BO)
The binary output block is the logical image, or memory map, of a binary switch
command and describes its properties. Within the program it is made available
to the block as a program value, and its parameters are set via the "Polarity"
pin. The block converts this program value and transfers the raw data to the
physical I/O, where it is converted into a digital signal, e.g., which drives the
field device via a contact.
The following functions are integrated in the block:
● Evaluation of the priority array [PrioArr]
● Inversion of the switch value and the feedback value (Polarity of feedback
[Bop])
● Interruption of the output signal [OoServ]
● Feedback monitoring (OFFNORMAL alarm)
● Reliability monitoring [Rlb] (FAULT alarm)
● Change of state messages (events / system events)
● Configurable switch types (Normal, Trigger, Pushbutton, Pushbutton with
delay)
● Runtimes and monitoring periods
● Switch-command delays
● Process monitoring [StaFlg]
● Runtime totalization and maintenance messages