Siemens SIMATIC ET 200SP Manual page 78

Drivers, parameters, diagnostics messages and address space
A.9 Address space in mixed mode
The command byte identifies the requested HART variable (HART variable reference):
HART variable reference
Bit 0...3:
Variable identifier
1 = Primary
2 = Secondary
3 = Tertiary
4 = Quaternary
The command is acknowledged via the acknowledgment byte in the input range. The
requested HART variable can be evaluated as soon as the HART variable reference requested
with the command can be read in the acknowledgment byte.
If you leave the command byte of the multiHART range unchanged, the module will
continuously update the corresponding HART variable.
If an invalid HART variable reference is requested, this is also acknowledged accordingly. In
this case, the value of the HART variable is zero and the quality code is output with 0x37
(initialization value of the analog module).
Example:
The primary variable of channel 6 is to be read.
Figure A-7
78
Command = 61
H
Acknowledgment == 61
H
Evaluate quality code Evaluate quality code and if applicable
variable
Command = 0x61
Bit 4...7:
Channel number 0...15
? ?
Input/output module AI-DI 16/DQ16x24VDC HART HA (6DL1133-6EW00-0PH1)
Manual, 05/2017, A5E39294170-AA
H