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The 465 Analog Input Module
Measured-value
representation for current
measuring ranges from 4 to
20 mA
Current limiting
Units
Input
Current
7
6
5
11
10
in mA
S
2
2
≥ 4096
≥32.000 0
1
1
4095
31.992
0
1
1
3072
24.0
0
1
1
3071
23.992
0
1
0
2561
20.008
0
1
0
2560
20.0
0
1
0
2048
16.0
0
1
0
512
4.0
0
0
0
511
3.992
0
0
0
384
3.0
0
0
0
383
2.992
0
0
0
0
0
0
0
0
9 - 74
Measuring range 500 mV; card with 31.25 ohm shunt
(6ES5 498-1AA51/AA71)
The 4 to 20 mA range is resolved to 2048 units at an interval of 512 to
2560. If you require a representation from 0 to 2048, you must
subtract 512 units by software. Please note the following:
• • A broken wire signal cannot be emitted.
• • Detection of the overrange can be achieved by scanning bits 2
11
and 2
.
• • A broken wire can be detected with currents < 3 mA.
• • If you short-circuit the positive and negative terminals of the
transducer when using the 6ES5 498-1AA51 range card (for a
two-wire transducer), the current is limited to about 28 mA. Until
the thermal current limiting circuit responds in the range card
(about 3 s), a short-circuit current of approximately 250 mA flows;
this sets the overflow bit for this duration at all channels.
Byte 0
4
3
2
1
0
7
6
5
9
8
7
6
5
4
3
2
2
2
2
2
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
1
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
1
1
0
0
0
0
0
0
1
0
1
1
1
1
1
0
0
0
0
0
0
0
0
A = Active bit
E = Error bit
OV = Overflow bit
S = Sign
Byte 1
4
3
2
1
0
2
1
0
2
2
A
E
OV
1
1
0/1 0
1 Overflow
1
1
0/1
0
0
Overrange
0
0
0/1
0
0
Short-circuit with two-
1
1
0/1
0
0
wire transducer
0
1
0/1
0
0
0
0
0/1
0
0
0
0
0/1
0
0
Rated range
0
0
0/1
0
0
1
1
0/1
0
0
Range underflow
0
0
0/1
0
0
1
1
0/1
0
0
0
0
0/1 0
0 Broken wire
C79000-B8576-C109-03
9
System Manual
- Quick Links:
- S5-135U/155U
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