ABB 2600T Series Instruction Manual page 44

4 4 2 6 0 0 T S E R I E S | P R E S S U R E T R A N S M I T T E R S | O I/ 2 6 6/ F F - E N R E V. E
. . .Device Configuration/Setting through FF communication
This correction can be executed only if the Calibration Lower Range value is 0.0 and must be made with process (dp or p) = 0.
The correction consists in the Zero elevation/suppression operation and can be done in two ways:
1 Locally by acting on the Z push button when the electronic switch SW 3 is set to 0, see dedicated section
2 From remote station via FF communication writing 0.0 in the PTRB_DESIRED_PRIMARY_VALUE
In case the Calibration Lower Range value is not 0.0 then the correction cannot be executed through the local Z push button, but it
can be done only from remote station via FF communication writing the correct measure value in the PTRB_DESIRED_PRIMARY_VALUE
IMPORTANT
After the above operations the Calibration Range Values are not changed. The desired process output value is produced
through an internal calculation by applying an offset at the measured value.
Transducer Blocks Diagram
Initialization
The 266 PdP implements up to three Analog Input Blocks.
Each AI produce in output one variable (AIx_OUT) suitable to be linked to other downstream function blocks. The three AIs receive
in input one of the dynamic variables produced by the Pressure Transducer Block selected trough the AIx_CHANNEL setting.
The default AIx_CHANNEL setting is:
• The Analog Input 1 is set to Channel 1 and receives in input the PRTB_PRIMARY_VALUE (Process Pressure) (AI1_CHANNEL = 1).
• The Analog Input 2 is set to Channel 3 and receives in input the PRTB_TERTIARY_VALUE (Static Pressure) (AI2_CHANNEL = 3).
• The Analog Input 3 is set to Channel 2 and receives in input the PRTB_SECONDARY_VALUE (Sensor Temperature) (AI3_CHANNEL = 2)