Hmi As Feedback Of The Local Push Button Operations; Correction Of Zero Shift With Pv Zero Bias / Offset; Hardware Settings; Advanced Hart - ABB 266 HART Series Operating Instruction

8.6 HMI as feedback of the local push button
operations
As consequence of the operations described in the section 8.5,
when the Z or S buttons are released, the feedback of the
executed operation is displayed in the bottom of the LCD
(same position as per diagnostic messages):
Message Description
! Oper Done The push button operation has been successfully executed
! Proc Too The Pressure measured in input is too low and not
Low acceptable for the requested operation
! Proc Too
The Pressure measured in input is too high and not
High
acceptable for the requested operation
! New URV The Zero (Z) operation cannot be accepted because the
Error URV would be shifted outside the Upper Sensor limit
The Span (S) operation cannot be accepted because the
! Span Error
new URV would be too close to the LRV and their
difference lower than the Minimum Span value
! Oper The push button operation has been refused because the
Disabled Write Protection is enabled.
! LRV Too New LRV is too low and not acceptable for the requested
Low operation
LRV Too
New LRV is too high low and not acceptable for the
High
requested operation
URV Too New URV is too low and not acceptable for the requested
Low operation
URV Too New URV is too high and not acceptable for the requested
High operation
Device is armed to accept HART command 73 "Find
Armed Device". This message can be triggered only during the
device wakeup operation
8.7 Correction of zero shift caused by installation
with PV Zero Bias / Offset
— Raise the dip switch 3 in 1 (up) position.
— Press the "Z" button. This sets the output current to
4 mA, the digital PV value will be set to 0 (zero).
— To reset the PV zero bias setting, press the "S" button.
Important. When the transmitter has been rezeroed following the
above procedure, a zero bias/offset value is applied and stored in
the transmitter memory.
Important. This action can be performed both by using the
external, non-intrusive push buttons (option R1) and the on-board
buttons of the integrated LCD display, which become respectively
associated to B and R letters in the lower corners, as shown in
figure 48b.
Important. For Standard HART version, after releasing Z and S
buttons (on LCD or external) during range values configuration or
PV to zero bias/Reset PV bias setting, the transmitter displays a
message to confirm or abort the operation, showing Yes and No in
the bottom corners of the display. Proceed accordingly by acting
on the corresponding button: Z for NO and S for YES.
36 OI/266/HART-EN Rev. M | 2600T Series Pressure transmitters

8.8 Hardware settings

8.8.1 Advanced HART

There are 6 dip switches located on this kind of secondary
electronics.
Switch 1 and 2 allow the REPLACE MODE for sensor or
secondary electronics.
Switch 3 identifies the external push buttons functionalities:
Zero/Span adjustments or PV Bias-Offset / PV Bias Reset.
Switch 4 and 5 are for Fail Low/Fail High selection.
Switch 6: not used.
The electronic label explains how to perform all the possible
selection. All operations with the dip switches should be carried
out when the transmitter is powered off so as to upload new
configurations at instrument start-up.
Replace mode (switches 1 and 2)
Usually switches 1 and 2 are down in "0" position. They are
moved when a replace operation is required.
Switch 1 up in "1" position is required before power up the
transmitter, when user needs to replace the electronics or the
sensor.
Switch 2 down in "0" position allows the replace of the
secondary electronics. It must be moved in this position before
power up the transmitter.
Switch 2 up in "1" position indicates that a new sensor has been
installed.
AFTER ANY REPLACE OPERATION MOVE DOWN IN "0"
POSITION THE RELEVANT SWITCHES.
Push buttons mode (switch 3)
Dip switch 3 is set at the factory on "0" position. This means
that the external push buttons perform the zero/span
adjustments. If the user puts this switch on "1" position, the
zero push buttons will modify the PV Bias-Offset and the span
push button will reset the PV Bias-Offset value.
Fail mode (switch 4 and 5)
Should the user modify the factory-defined parameters for the
fail safe output condition in case of transmitter failure, it is
necessary to enable the modification by putting dip switch 4 on
"1" position. Consequently, it is necessary to choose whether
the output has to go Upscale or Downscale.
Dip switch 5:
on "0" position the output is driven upscale (High alarm 21mA)
on "1" position the output is driven downscale (Low alarm 3.6mA)
Figure 48a: Dip switches position on Advanced HART
communication board
8 Operation