10 - 8
(a) Overhead time at execution of interrupt and fixed scan execution type programs
When calculating instruction execution time, add the overhead time given in the following table to the
instruction execution time, which is described in (4).
Two kinds of overhead time (pre-start and program-end) need to be added to interrupt programs.
*1: Indicates the value when the QI60 is mounted on the slot 0 of the main base unit.
*2: When any extension base unit is connected, the Q160 cannot be used. The values in the above list indicate overhead time for interrupt
processing from an intelligent function module.
Table10.3 Pre-start overhead time for interrupt programs
CPU module
Fixed scan interrupt
(I28 to I31)
Interrupt
*1
(I0 to I15) from QI60 or
interrupt (I50 to I127) from the
intelligent function module
Without
high-speed
start
With high-
speed start
Without high-
speed start
With high-speed
start
Q00JCPU
175 s 150 s 350 s 325 s
Q00CPU
145 s 125 s 285 s 265 s
Q01CPU
135 s 120 s 270 s 255 s
Q02CPU
190 s 85 s 205 s 100 s
Q02HCPU, Q06HCPU, Q12HCPU, Q25HCPU
85 s 40 s 90 s 45 s
Q02PHCPU, Q06PHCPU, Q12PHCPU, Q25PHCPU
85 s 40 s 90 s 45 s
Q12PRHCPU, Q25PRHCPU (when no extension base unit is
connected)
85 s 40 s 90 s 45 s
Q12PRHCPU, Q25PRHCPU (when extension base unit is
connected)
85 s 40 s
1090 s
*2
1045 s
*2
Table10.4 Program-end overhead time for interrupt programs
CPU module Without high-speed start With high-speed start
Q00JCPU
175 s 150 s
Q00CPU
145 s 125 s
Q01CPU
135 s 120 s
Q02CPU
180 s 75 s
Q02HCPU, Q06HCPU, Q12HCPU, Q25HCPU
80 s 35 s
Q02PHCPU, Q06PHCPU, Q12PHCPU, Q25PHCPU
Q12PRHCPU, Q25PRHCPU
Table10.5 Overhead time for fixed scan execution type programs
CPU module Without high-speed start With high-speed start
Q02CPU
380 s 230 s
Q02HCPU, Q06HCPU, Q12HCPU, Q25HCPU
165 s 100 s
Q02PHCPU, Q06PHCPU, Q12PHCPU, Q25PHCPU
Q12PRHCPU, Q25PRHCPU
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