ABB AC500-S Safety User Manual page 325
Hide thumbs
Also See for AC500-S:
- Safety user manual (452 pages) ,
- Application note (24 pages) ,
- System manual (119 pages)
Table of Contents
Advertisement
With PROFINET (SM560-S-FD-1 ➔ SM560-S)
SFRT = Device_WD1 + 0.5 * F_WD_Time1 + F_Host_WD + Longest ∆T_WD = 9 + 25 + 6 + 25
= 65 ms
where:
●
Device_WD1 = 3 x 3 ms (SF_WDOG_TIME_SET time) = 9 ms
●
F_WD_Time1 = 50 ms
●
F_Host_WD = 3 x 2 ms (SF_WDOG_TIME_SET time) = 6 ms
●
Longest ∆T_WD = 0.5 * F_WD_Time1 = 25 ms
2020/06/19
NOTICE!
SFRT calculation for such cases as SM560-S-FD-4 ➔ SM560-S, SM560-S ➔
SM560-S-FD-1, SM560-S ➔ SM560-S-FD-4, etc. can be calculated in a similar
way as it is shown in Fig. 120.
DANGER!
Mistakes in SFRT calculation can lead to death or severe personal injury, espe-
cially in such applications like presses, robotic cells, etc.
NOTICE!
The high priority tasks on non-safety CPU, which are a part of the "black
channel" for safety communication, may affect TWCDT for AC500-S safety
PLC.
3ADR025091M0208, 12, en_US
Safety times
Safety function response time
325
Advertisement
Table of Contents
