ABB AC500-S Safety User Manual page 109

DANGER!
The input delay parameter means that signals with the duration shorter than input delay value are
always not captured by the safety module.
The signals with the duration of equal to or longer than "input delay parameter" + "input delay accu-
racy" are always captured by the safety module, provided that the allowed frequency (see previous
Notice) of the safety input signal is not exceeded.
The "input delay accuracy" can be estimated based on the following assumptions:
– If no test pulses are configured for the given digital safety input, then input delay accuracy can be
calculated as 1 % of set input delay value (however, input delay accuracy value must be at least
0.5 ms!).
– If test pulses are configured for the given digital safety input of DX581-S module, then the fol-
lowing input delay accuracy values can be estimated based on the input delay parameter value:
Input delay (ms)
1
2
5
10
15
30
50
100
200
500
n Checking of process power supply (Diagnostic message is sent from the Safety I/O module to the CPU
informing about the lack of process power supply for the given Safety I/O module). This function is a non-
safety one and is not related to the internal safety-relevant over- and undervoltage detection.
n 2 channel equivalent and 2 channel antivalent mode with discrepancy time monitoring (configurable
10 ms ... 30 s).
NOTICE!
In a 2 channel mode, the lower channel (channels 0/4 ➔ Channel 0, channels 1/5 ➔ Channel 1, etc.)
transports the aggregated process value, PROFIsafe diagnostic bit, acknowledgement request and
acknowledge reintegration information. The higher channel always provides the passivated value "0".
30.03.2017
DX581-S digital safety input/output module > Functionality
Input delay accuracy (ms)
2
2
3
4
5
6
10
15
25
50
AC500-S
AC500-S Safety Modules
109