KROHNE VFM 5090 EN User Manual

Page 26

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XT units

Unit of external temperature

XP val

Numeric value of computed external thermal power.

XP units

Unit of external thermal power.

NP val

Numeric value of computed net thermal power.

NP units

Unit of net thermal power.

NE val

Numeric value of computed net thermal energy.

NE units

Unit of net thermal energy.

<ID>

Optional meter identifier. Value between 00 to 99

#nn Err#

nn is the number of errors detected by the instrument.

error mesg.

Error message as appears in the alphanumeric line of display.

<sp>

ASCII

space

character.

ASCII carriage return and line-feed sequence.

Note : Either QV, QN or QM is transmitted at a time. Similarly for TV, TN and TM.

For all transmitted parameters, the user selected unit is used.

After all parameters <cr><lf> is send instead of <sp><sp>

Example -

:QM1234.56 <sp> <sp>kg/hr <sp> <sp>
:TM1000.00<sp><sp>kg<sp><sp>
:PR1.00<sp><sp>atm<sp><sp>
:TR100.0<sp><sp>Deg.C<CR><lf>
:HE# 1 Err# <sp> <sp> LOW FLOW <cr> <lf>

Note that the actual number of characters in each format is not fixed and depends on the contents of Measured
Value, unit and error mesg. fields. The user system may use the 2 space characters and CR, LF characters as
delimiters for fields.

2.4 RS-485 OUTPUT (FOR AGA NATURAL GAS METER)

RS485 option given for AGA supported software is same except for some transmitted values.These values are as
follows :

:CF<CFval><sp><sp><CFunits><sp><sp>
:TH<THval><sp><sp><THunits><sp><sp>
:HE# nn Err#<sp><sp>
:m<mesg m><cr><lf>

If there are Fatal Errors detected by 5090(I) then measurement is not made and transmitted :

:FEFATAL.ERROR<cr><lf>
:HE# nn Err#<sp><sp>
:<mesg m><cr><lf>
where
CFval

Numeric value of computed compressibility factor

CFunit

Unit of computed compressibility factor

THval Numeric value of computed thermal heat value
THunit Unit of the computed thermal heat value
#nn Err#