Sitrans T; Description Of Sitranst - Siemens SITRANS PCS 7 Function Manual

SITRANS T

9.1 SitransT
9.1.1

Description of SitransT

Object name (type + number) and family
Type + number: FB 2628
Family: SitransT
Area of application of SitransT
The block is used for the following applications:
● Interface block between the driver blocks of the SITRANS TH300/TH420 for the user
program and visualization
How it works
The SitransT block prepares the process data received from driver blocks from a
SITRANS TH300/TH420 and makes the data available for further use in the user program and
for visualization. Data entered in the faceplate or via the block inputs is transferred to the
SITRANS TH300/TH420 by means of driver blocks.
The function block supports display of the 4 to 20 mA signal, the HART variables and the slave
pointer according to the configuration of the SITRANS TH300/TH420 .
Configuration
Use the CFC editor to install the block in a cyclic interrupt OB (OB30 to OB38). The block is also
installed automatically in the startup OB (OB100). Moreover, to connect the I/O signals, it is
imperative to call the driver blocks Pcs7AnIn (cyclic data, 4 to 20 mA), FbAnIn (HART variables)
and PiDr64 (acyclic data) in the same interrupt OB and startup OB (OB100) before the SitransT
block in each case. The output structure AcyclData of the PiDr64 block is interconnected to
the input with the same name of the SitransT block.
The SlotHart input receives the slot number of the Sitrans TH300/TH420 within the analog
input module. The Feature bits 2 to 6 must be used to configure whether communication with
the module is by means of the HART protocol and, if applicable, which HART variables are
used. If HART communication is used, reading out of the module configuration can be triggered
in the WinCC faceplate. Otherwise, the physical variable of the 4 to 20mA signal (PV_Meas0
SITRANS Library for PCS 7
Function Manual, 05/2019, A5E35351976-11
9
321