Additional Temperature Settings For 877 Fdi - Honeywell Enraf VITO Instruction Manual

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With the VITO temperature probes and also with an 864 MTT, it might be required to disable the lowest spot
element from the average temperature calculation. That can be done by setting the first position in item MW to
any other hexa-decimal number than '0', for instance: 'F'. In fact, with item MW any spot temperature element (or
more spots) can be disabled from average temperature calculation.
Item Name
Protection level 2
W2=
MTT wiring connection
MW=
EX Exit
2.2.2

Additional temperature settings for 877 FDI

Item Name
Protection level 2
W2=
OB= Option board *)
EG= Enable temperature
transmission *)
TF= Temperature source
selection
EX Exit
*) This item is not implemented in the XPU-2.
Instruction manual VITO
Average temperature measurement with VITO temperature probes
Description
Enter protection level 2
Sixteen hexa-decimal characters; default: 0000000000000000
When one (or more) of the elements must be disabled from
average temperature calculation, set the desired position to a
hexa-decimal value other than '0'.
For instance, to disable lowest spot element:
Note:
When entering item MW with the Portable Enraf Terminal,
the display will be cleared after entering the 15
Continue with entering the last character and press return.
All 16 entered characters will be repeated at the top line of
the PET.
Exit protection level 2
Description
Enter protection level 2
Three ASCII characters. This item informs the XPU what option
board is installed. That can be:
MPU :
HPU :
One ASCII character; either 'D' or 'E'. With this item can be
selected if the 877 FDI shall answer on a temperature request
(C-record), addressed to the connected level gauge.
E :
D :
Note:
When item EG is set to 'E', make sure the related level gauge
has no temperature option installed.
One ASCII character; either 'I' or 'E'. this item selects if there is
a temperature measurement inside the indicator (internal) or to
be fetched from the Enraf field bus (external).
I :
E :
Exit protection level 2
MW=F000000000000000
for HCU option board in MPU emulation mode
for HCU option board in HPU emulation mode
transmission of temperature record enabled
transmission of temperature record disabled
Internal
External
th
character.
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