Parallel Operation; Variables; Useful Information About Hart Variables - Siemens SIMATIC ET 200SP HA Equipment Manual

7.3.5

Parallel operation

Definition
The I/O module processes the HART communication in parallel operation, that is, all channels
simultaneously.
7.4

Variables

7.4.1

Useful information about HART variables

HART variables, the properties dialog and address assignment are explained below.
Properties dialog of the I/O module
In the properties dialog of the I/O module, you can configure up to 4 HART variables directly in
the input address area of the I/O module. You select these from the four HART variables provided
by each channel:
HART variables (Page 42)
You can refer to the quality code for information on the process status of a HART variable.
Quality code (Page 42)
The HART variables are assigned to a channel in the properties dialog of the module. The HART
variables are configured via parameter data record 130. This allows you to process measured
values directly from the field device as input data in the automation device.
Parameter assignment and structure of the HART mapping parameters (Page 54)
You also determine the use of the multiHART range and its properties in the properties dialog box
of the I/O module.
multiHART range (Page 44)
Address assignment
You can choose to configure the following:
• Maximum 4 HART variables
Each HART variable occupies 5 bytes of input data. As soon as you configure (map) at least
one HART variable in the input address space, the addresses for all 4 tags are assigned (20
bytes).
• A multiHART range
If the multiHART range is used, an additional 4 bytes of input address space and 1 byte of
output address space is allocated.
AQ 4xI HART ISOL HA
Equipment Manual, 07/2022, A5E50102497-AB
HART function
7.4 Variables
41