Analog Input Modules
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8.1.4 Process data mapping
n = offset of input data; depending on extension of station and the corresponding fieldbus.
8.1.5 Diagnostic and status messages
LED status displays
Fig. 107: 4-wire sensor with external sensor supply BL20-S3×-SBB
Data Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Input n AI1 LSB
n + 1 AI1 MSB
NOTE
With PROFIBUS, PROFINET and CANopen, the I/O data of this module is localized within
the process data of the whole station via the hardware configuration tool of the fieldbus
master.
For DeviceNet, EtherNet/IP and Modbus TCP a detailed mapping table can be created with
the TURCK BL20 DTM in PACTware.
Process data Meaning
AI1 LSB low byte of the analog value
AIx MSB high byte of the analog value
LED Display Meaning Remedy
DIA Red, flashing
0.5 Hz
Diagnostics pending -
Red
Module bus commu-
nication failure
Check if more than two ad-joining electronics
modules have been pulled.
Check the supply of the module bus.
Off No error messages or
diagnostics
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