Справочник Пользователя для Mitsubishi Electronics Q04UDVCPU

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Appendix 4

Processing Time

Appendix 4.1

Concept of scan time

The concept of scan time in a multiple CPU system is the same as that in a single CPU system.
This section describes how to calculate the processing time when a multiple CPU system is configured.

(1) I/O refresh time

For the calculating formula of I/O refresh time, refer to the following.

User's Manual (Function Explanation, Program Fundamentals) for the CPU module used

The I/O refresh time increases by the time obtained by the following calculation when more than one CPU
module simultaneously accesses I/O modules and intelligent function modules through the bus .

Use the following value for N3.

(2) Total instruction execution time

For the processing time of the multiple CPU system dedicated instructions and the processing time of instructions
whose processing times differ between in a single CPU system and a multiple CPU system, refer to the following.

MELSEC-Q/L Programming Manual (Common Instruction)

QCPU

System with a main base unit

only

System including extension

base unit(s)

Q00CPU, Q01CPU

8.7µs

21µs

Q02(H)CPU, Q06HCPU, Q12HCPU,
Q25HCPU

Q02PHCPU, Q06PHCPU, Q12PHCPU,
Q25PHCPU

Q00UCPU, Q01UCPU, Q02UCPU,
Q03UD(E)CPU, Q04UD(E)HCPU,
Q06UD(E)HCPU, Q10UD(E)HCPU,
Q13UD(E)HCPU, Q20UD(E)HCPU,
Q26UD(E)HCPU, Q50UDEHCPU,
Q100UDEHCPU

Q03UDVCPU, Q04UDVCPU,
Q06UDVCPU, Q13UDVCPU, Q26UDVCPU

(Extended time) =

(Number of input points + Number of output points)

N3 (Number of other CPU modules) (µs)