Appendix 3.2 Time Required For Each Processing Included In Scan Time; Appendix - Mitsubishi Electric Q01UCPU User Manual

(1) How to check scan time
The CPU module measures current, minimum, and maximum values of the scan time.
The scan time can be checked by monitoring the special register (SD520, SD521, and SD524 to SD527).
Accuracy of each stored scan time is ±0.1ms.
Current value
Minimum value
Maximum value
If the stored values in SD520 and SD521 are 3 and 400 respectively, the scan time is 3.4ms.
Ex.

Appendix 3.2

This section describes how to calculate the processing time and execution time described in Page 466, Appendix 3.1.
(1)
I/O refresh time
I/O refresh time is the time required for refreshing I/O data to/from the following modules mounted on the main
base unit and extension base units.
• Input module
• Output module
• Intelligent function module
 Calculation method
Use the following expression to calculate the I/O refresh time. For N1 and N2, refer to the following table.
(I/O refresh time) = (number of input points/16) × N1 + (number of output points/16) × N2
CPU module
Q00UJCPU, Q00UCPU, Q01UCPU
Q02UCPU
Q03UD(E)CPU, Q03UDVCPU,
Q04UD(E)HCPU, Q04UDVCPU,
Q06UD(E)HCPU, Q06UDVCPU,
Q10UD(E)HCPU, Q13UD(E)HCPU,
Q13UDVCPU, Q20UD(E)HCPU,
Q26UD(E)HCPU, Q26UDVCPU,
Q50UDEHCPU, Q100UDEHCPU
*1 Applicable only when the CPU module whose serial number (first five digits) is "13102" or later is used.
SD520 SD521
SD524 SD525
SD526 SD527
Time required for each processing included in scan time
Q3B, Q3SB,
Q5B, Q6B,
Q3RB,
Q6RB
Q3DB
N1 N2 N1
1.8µs 1.1µs 2.6µs
1.5µs 1.1µs 2.4µs
1.5µs 1.0µs 2.3µs
Stores the scan time of 1ms or less (unit: s).
Stores the scan time. (unit: ms).
QA1S5B, QA1S6B,
QA1S6ADP+A1S5B,
QA1S6ADP+A1S6B
N2 N1
1.9µs 4.9µs
1.9µs 4.5µs
1.8µs 4.3µs
APPENDICES
QA6B,
QA6ADP+A5B,
*1 *1
QA6ADP+A6B
N2 N1 N2
4.0µs 5.7µs 4.9µs
4.0µs 5.3µs 4.9µs
3.9µs 5.0µs 4.8µs
467
A