ABB AC500-S Safety User Manual page 109

The following table shows the mapping of safety CPU process values to the values in mA from
AI581-S module. Two modes are defined for an analog input 0 ... 20 mA and 4 ... 20 mA.
Range 0 ... 20 mA
Overflow* :
> 23.519
23.519
Overrange :
20.000723
20
Nominal
range :
0
Underrange -0.000723
:
-1.481
Underflow* < -1.481
* In these cases, the analog channels are passivated and "0" process values are delivered to
the safety CPU.
2020/06/19
NOTICE!
In case of the overcurrent/undercurrent detected at the safety analog input
channel, the channel passivation takes place latest after 200 ms. The channel
remains passivated for 30 s and then the check is performed if the overcurrent/
undercurrent still present or not. If the overcurrent/undercurrent has gone, then
reintegration request signal for the given channel is set to TRUE to allow
channel reintegration.
NOTICE!
Both overflow and overrange represent an overcurrent. Both underflow and
underrange represent an undercurrent.
Only in case of overflow and underflow, the analog channels are passivated and
"0" process values are delivered to the safety CPU.
4 ... 20 mA Digital value (dec)
32767*
: :
> 22.81 32512*
22.81 32511
: :
20.000578 27649
20 27648
: :
16 20736
: :
4 0
0 ... 20 mA
3.999421 -1
: :
1.185 -2048
0 ... 20 mA
< 1.185 -2049*
:
-32768*
3ADR025091M0208, 12, en_US
AI581-S safety analog input module > Functionality
Digital value (hex)
7FFF*
:
7F00*
7EFF
:
6C01
6C00
:
5100
:
0000
4 ... 20 mA 0 ... 20 mA
-1 FFFF
: :
-4864 F800
4 ... 20 mA 0 ... 20 mA
-4865* F7FF*
: :
-32678* 8000*
AC500-S safety modules
4 ... 20 mA
FFFF
:
ED00
4 ... 20 mA
ECFF*
:
8000*
109