Omron SYSMAC C200HW-PCS01-EV1, Operation Manual

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5-3-11 File Precautions
•
When comma-separated files are written by CMCR, they are written as one
line.
•
Comma-separated files created at a personal computer are read with the
assumption that they were created in one of the following formats.
4 bytes, comma, 4 bytes, comma, 4 bytes, comma....
8 bytes, comma, 8 bytes, comma, 8 bytes, comma....
•
Additional data can only be written to a file if there is space available on the
card, and file data can only be overwritten in the range where an offset can be
specified.
•
Individual fields in comma separated files are not enclosed by quotation
marks.
5-4 Memory Card Access Times for CMCR Instructions
The minimum times for executing CMCR instructions are as follows:
Minimum CMCR Instruction Execution Times
Unit processing time B
CMCR instruction
executed Completed
Local node
cycle time
Unit processing
time A
Memory Card access time
The access time will differ depending on the type of Memory Card used, so in this
instance it is calculated as 0.
Minimum CMCR Instruction Execution Time
= local node cycle time + Unit processing time A + Memory Card access time
+ Unit processing time B + local node cycle time.
•
Unit Processing Time A
Time to write data on the card: no. of write words
×
0.013 + 5 ms
Time to read data from a card: 5 ms
•
Unit Processing Time B
Time to write data on the card: 5 ms
Time to read data from a card: no. of read words
×
0.013 + 5 ms
Example:The minimum instruction execution time for writing 999 words
Local node cycle time
×
2 + 999
×
0.013 + 5 ms + 5ms
= local node cycle time
×
2 + 22.987 ms
Actual Measurement Values The write time for a 999-word SRAM card: 24 ms
The write time for a 1-word SRAM card: 9.7 ms
When a PC Card Unit is connected to the C200HX/HG/HE CPU, the cycle time
will be delayed by a maximum of 6 ms. C200HX/HG/HE Cycle Delay
Time
Memory Card Access Times for CMCR Instructions
Section 5-4