Mitsubishi Q02CPU

6
FUNCTIONS
6.12 Writing in Program during CPU Module RUN
6.12.2 File-write during RUN
6
- 68
1
Overview
2
Performance Specification
3
Sequence Program Configuration and Execution Conditions
4
I/O Nunber Assignment
5
Memories and Files Handled by CPU Module
6
Functions
7
Communication with Intelligent Function Module
8
Parameters
(2) Precautions
The precautions for file-write during RUN are as follows.
(a) Condition under which program file-write during RUN can be executed
The file-write during RUN can be executed when any of the following conditions is
met.
1) Program memory
• When continuous space is available.
• When space is available.
2) Memory card
When space is available.
(b) Increase in scan time
Please note that scan time could be extended as shown in Table6.25 if the file-
write during RUN is executed. Controls are stopped for some time as specified by
a value in Table6.25.
Please note that scan tame is extended for 1.25 seconds at 30 k step when an
ATA card is in use.
(c) When file is accessed by sequence program instruction
Please note that no access can be made from an instruction in a sequence
program while a batch of files is written, with the CPU module in the RUN status.
While the file-write during RUN is being executed, an instruction to make access
to a file is not executed.
(d) Disabled file-write during RUN from multiple locations
Do not execute file write during RUN simultaneously from multiple locations.
Doing so may erase program file contents.
Table6.25 Scan time increased by file batch-write during RUN
Event Q02CPU
QnHCPU,
QnPHCPU,
QnPRHCPU
When continuous space is available in a program
memory
max. 80 ms max. 300 ms
When space is available in a program memory max. 80 ms max. 300 ms
When space is available in a memory card (except ATA
card)
max. 120 ms max. 570 ms