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CHAPTER 3 FUNCTIONS
3
3.21 High-Speed Interrupt Function
3.21.3 Precautions
Scan time measurement
The startup of a high-speed interrupt delays for the following period of time.
• When registered: 100µs
• During measurement: 15µs
Sampling trace
The startup of a high-speed interrupt delays for the following period of time.
• At startup: 110µs
• During execution: 11µs
• Internal user device (word: 50 points, bit: 50 points)
Data logging function
The startup of a high-speed interrupt delays for the following period of time.
Logging type: Continuous logging (one setting, no CSV output)
• Each scanning cycle (Device data match.), internal user device (128 points): 15µs
• Step No. specification, internal user device (128 points): 45µs
Data logging by a high speed data logger module
The startup of a high-speed interrupt delays for the following period of time.
• General data sampling: Link direct device (256 points): 1ms
• High-speed data sampling: File register (256 points): 40µs
Online change
The startup of a high-speed interrupt delays for the following period of time.
• Online change (ladder mode): 40µs maximum
• Online change (files): 15µs maximum
Diagnostic function (such as PC diagnostics, system monitor)
The startup of a high-speed interrupt delays for about 1ms (maximum) in the multiple
CPU system or if any diagnostic target module is mounted on the base unit.
Error clear
The startup of a high-speed interrupt delays for the following period of time.
• Annunciator error: about 30µs
• Battery error: about 25µs
IP packet transfer function The startup of a high-speed interrupt delays for about 30µs.
Access command issuance from intelligent function modules, such
as the QJ71C24 and QJ71E71, to the CPU module
The startup of a high-speed interrupt delays for the following period of time.
• Read/write command: (0.060 × (number of device points) + 12) µs
• Batch write command: (0.10 × (number of device points)) µs
• Batch read command: (0.13 × (number of device points)) µs
Clock setting using a programming tool The startup of a high-speed interrupt delays for about 30µs.
Item Operation when executed
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