Basics - YASKAWA VIPA System SLIO Manual

VIPA System SLIO
3.27.3

Basics

3.27.3.1 Terms
Measurand
Measured value
ID
DS-ID
HB300 | SM-AIO | | en | 17-05
Reset energy counters after installation!
As soon as the module is supplied by the DC 24V power section supply,
the measurement is started and the counting of the energy counters is
continued with the retentive stored counter values. The measurement is
not interrupted by STOP or RESET of the CPU respectively the bus cou-
pler. After installing the module the energy counters should be reset by
CMD-Frame.
A measurand is a physical quantity that can be measured such as current, voltage or
Ä Chapter 3.27.6 'Measurands' on page 316
temperature.
A measured value is a value of a measurand, which is determined by measurement or by
calculation.
In the module each measurand one ID is assigned. The access to the measured value of
a measurand happens by means of the corresponding ID.
ands' on page 316
As soon as the module is supplied by the DC 24V power section supply, the measure-
ment is started and the counting of the energy counters is continued with the retentive
stored counter values. The measured values of all the measurands are stored in the
module with one record set ID DS-ID. The following must be observed:
n All measured values with the same DS-ID come from the same measurement and are
consistent.
n By specifying the DS-ID you can address the individual measured values of the same
measurement.
The DS-ID covers the values 1 ... 15. The start value can freely be selected.
n
n To refresh the measured values the DS-ID is to be incremented by 1. The value 15
must be followed by 1.
n If the DS-ID is incremented and there is still no new value available, the current value
is returned with an error.
n DS-ID = 0 - Auto increment mode
– With DS-ID = 0 there is a request with auto increment mode. Here the module
always returns the current measured value. As soon as a new measured value is
available, here the DS-ID is incremented by one within the values 1 ... 15. If there
is no new measured value available, the DS-ID is not changed and a error mes-
sage is returned.
n The uniqueness of a measured value always consists of the ID of the measurand and
the DS-ID.
031-1PA00 - AI1x 3Ph 230/400V 1A > Basics
Ä Chapter 3.27.7.2.5 'CMD Frame' on page 327
Ä 'Status communication' on page 319
Ä 'Status communication' on page 319
Analog Input
Ä Chapter 3.27.6 'Measur-
309