Analog input modules
D300529 0115 - BL67 I/O modules6-44
6.6.2 Process data mapping
n = offset of input data; depending on extension of station and the corresponding fieldbus.
Proc
ess data Meaning
Temperature coefficient
≤ 30
0 ppm/°C from end value
Resolution of the A/D converter 16 bit
Measuring principle Delta Sigma
Measurement value representation – 16 Bit: two's complement coded
or
– 12 bit left-justified
two’s complement (even negative values possi-
ble) binary number without coding (only posi-
tive values possible)
Data Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Input
n
AI0 LSB
n + 1 AI0 MSB
n + 2 AI1 LSB
n + 3 AI1 MSB
n + 4 AI2 LSB
n + 5 AI2 MSB
n + 6 AI3 LSB
n + 7 AI3 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 configuration tool I/O-ASSISTANT V3 (PACTware + BL67-DTM).
Table 6-30:
Process data bits
AI1 LSB low byte of the analog value
AIx MSB high byte of the analog value
To Next Page
Loading...
