WAGO-I/O-SYSTEM 750
Process Image
71
753-668/000-004 4FAI 0/4-20 mA Diff PROFIsafe
Manual
Version 1.0.0, valid from HW/SW Version 01/01
5.9.1.2
Measurement Range 4
… 20 mA with Wire Break Detection Enabled
Table 40: Siemens S7 with Fixed Substitute Values, 4
… 20 mA, Wire Break Detection Enabled
Measurement
Range
Unit
Channel
Status
Range
Decimal
Hexadecimal
> 25 mA
Parameterizable substitute
value
2
0
Overload
25
…
> 22.814 mA
32767
0x7FFF
2
0
Overflow
22.814
…
20.0006 mA
32511
…
27649
0x7EFF
…
0x6C01
1
Overrange
20
…
4.0005787 mA
27648
… 1
0x6C00
…
0x1
1
Nominal range
4.00 mA
0
0x0
3.9995
…
3.6000 mA
−1 … −691
0xFFFF
…
0xFD4D
1
Underrange
< 3.6000 mA
32767
0x7FFF
1,2
0
Wire break
1
Module reports wire break, 0x7FFF.
2
In “S7 F/FH Systems” an extra substitute value is output for this value in case of overload,
overflow or wire break in the safety program.
In “S7 Distributed Safety”, the substitute value 0 is provided in the process image for the safety
program instead of 0x7FFF (for overflow, wire break) or parameterized substitute value (overload).
5.9.1.3
Measurement Range 4
… 20 mA with Wire Break Detection Disabled
Table 41: Siemens S7 with Fixed Substitute Values, 4
… 20 mA, Wire Break Detection Disabled
Measurement
Range
Unit
Channel
Status
Range
Decimal
Hexadecimal
> 25 mA
Parameterizable substitute
value
1
0
Overload
25
…
> 22.814 mA
32767
0x7FFF
1
0
Overflow
22.814
…
20.0006 mA
32511
…
27649
0x7EFF
…
0x6C01
1
Overrange
20
…
4.0005787 mA
27648
… 1
0x6C00
… 0x1
1
Nominal range
4.00 mA
0
0x0
3.9995
…
0.4444 mA
−1 …
−6144
0xFFFF
…
0xE800
1
Underrange
< 0.444
… 0 mA −32768
0x8000
1
0
Underflow
1
In “S7 F/FH Systems” an extra substitute value is output for this value in case of overload,
overflow or underflow in the safety program.
In “S7 Distributed Safety”, the substitute value 0 is provided in the process image for the safety
program instead of 0x8000 (for underflow) or parameterized substitute value (overload).