Page 146 SITRANS LR250 (PROFIBUS PA) – INSTRUCTION MANUAL 7ML19985JF02
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G: Communications PA
Acyclic Data
SITRANS LR250 supports up to four simultaneous connections by a Class 2 Master
(C2 connection). It supports one connection by a Class 1 Master (C1 connection).
In order for a Class 1 Master to read parameters from an instrument, it needs to know the
slot and absolute index of the parameter.
The parameters are all listed in SIMATIC PDM under Help. If you do not have SIMATIC
PDM you can download the DD and reference the HTML help file directly.
To find the slot and index numbers via SIMATIC PDM, go to Help > Communications, and
select the appropriate block from the list. For each parameter, the slot and the relative
index is listed. For example.
Each block has a slot number and an Index Offset value.
To get the absolute index for any parameter, add the Index Offset for the appropriate
block to the relative index for that parameter. The parameter takes the slot number of the
block in which it is located.
For example:
• Parameter Static Revision Number has relative index = 1 and is located on AIFB1.
• It has Absolute Index = 17 (relative index 1 + index offset 16).
• It is located at Slot 1 (the slot number for AIFB 1).
S:43
Factory calibration for the radar
receiver has been lost.
Repair required: contact your
local Siemens representative.
53
S:51
EEPROM corrupt.
Repair required: contact your
local Siemens representative.
63
AIFB 1
Index Parameter Datatype
1 Static Revision No. UNSIGNED_INTEGER (2)
Block Name Slot Index Offset
Physical block 0 16
Transducer block 0 77
AIFB 1 1 16
AIFB 2 2 16
Acyclic Extended Diagnostics /General Fault Codes (cont’d)
LCD
display
Meaning (cont’d) Corrective Action
Byte
(cont’d)
Bit
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