Response Time; Recovery Time - Datasensing SH4 ADVANCED Product Reference Manual

RESPONSE TIME

Cascade operation is composed by a serialized optic scanning of all cascade units, then
the same post-Elaboration (optic scan analysis and self-testing) of single unit operation.
Then response time can be calculated in the same way of single unit case considering
Tscan as the time to scan all cascade units (comprehensive of communication messages
for units sync purpose).
MASTER
SLAVE1
SLAVE2
Cascade response time can also be computed from single units' response times with fol-
lowing formulas:

RECOVERY TIME

In cascade operation only receiver master unit synchronize with emitter master unit by
means of two sync optics and respective unique patterns, while T
depend on all units operation (see fig. 47). For what said in 4.4 recovery time is equal to
response time or 80ms whichever is greater.
T
responceC
SCAN1 WAIT WAIT PE
ES ES ES
M
P
WAIT ES SCAN2 ES WAIT ES WAIT
Es
P
WAIT WAIT SCAN3 WAIT
ES ES ES
Es
Tcycle
2 UNITS CASCADE: Sum of units' response times + 1ms
3 UNITS CASCADE: Sum of units' response times - 1ms
=3xT +2T +T
scanC post-elabC
SCAN1 WAIT WAIT PE
ES ES ES
M
P
WAIT ES SCAN2 ES WAIT ES WAIT
Es
P
WAIT WAIT SCAN3 WAIT
ES ES ES
Es
Tcycle
TresponceC
RESPONSE TIME
OSSD
SCAN1 WAIT WAIT
ES ES ES
T
OSSD
P
WAIT ES SCAN2 ES WAIT ES
Es
P
WAIT WAIT SCAN3
ES ES ES
Es
Tcycle
and T
SCAN SELF-TEST
PRODUCT REFERENCE GUIDE
PE
M
WAIT
WAIT
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