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Commissioning
SAI Inputs 0x1A02 (0x1A05)
This PDO contains the current measured value as REAL value. The format matches the REAL format from
the TwinCAT PLC Control.
The format matches the REAL format of IEC 61131-3, which in turn is based on the REAL format of IEC 559.
A REAL number (single precision) is defined as follows (See also Beckhoff InfoSys: TwinCAT PLC Control:
standard data types).
Bit position (from left)
Function
Table 4: Structure of the REAL value
Name
Value
Table 5: Process data 0x1A02
SAI Inputs 0x1600 (0x1601)
The terminal can be controlled via this PDO. The data are also available as Control WORD.
Name
Control → Disable
autorange
Control → Start
conversion
Control → Mode
Control → Range
Table 6: Process data 0x1600
Example Program [} 161]: Decomposition of WORDS into bits.
152
1
Sign
Explanation
Current measured value as REAL
Explanation
Request to disable Autorange.
Measurement request (rising edge), only
required in single shot mode.
Current measuring mode:
0: 4-wire measurement
1: 4-wire measurement, single-shot mode
2: 2-wire measurement
3: 2-wire measurement, single-shot mode
Current measuring range
(lower value is decisive for autorange
operation):
-1: 10 mΩ - 100 mΩ
0: 100 mΩ - 1 Ω
1: 1 Ω - 10 Ω
2: 10 Ω - 100 Ω
3: 100 Ω - 1 kΩ
4: 1 kΩ - 10 kΩ
5: 10 kΩ - 100 kΩ
6: 100 kΩ - 1 MΩ
7: 1 MΩ - 10 MΩ
Version: 3.1
8
23 (+1 "hidden bit", see
IE559)
Exponent
Mantissa
Position, size
0x6002:01, 4 bytes
Position, size
0x6000:01, 1 bit CW.0
0x6000:04, 1 bit CW.3
0x6001:05, 4 bit CW.4 - CW.7
0x6001:09, 1
byte
Bit in Control
WORD
CW.8 - CW.15
EL3692
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