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APPX
Appendix 6 Special Register List
221
A
Fixed cycle function information
The special registers for fixed cycle function information are as follows.
*1 The fixed cycle processing includes the refresh processing with network modules, the reset processing of watchdog timer, and the self-
diagnostic processing.
No.
Name
Content
Details
Set by (when to set)
SD520
Current fixed cycle
processing time
Current fixed cycle
processing time
(unit: ms)
The current fixed cycle processing time is stored in SD520 and SD521.
(Measured in microseconds.)
• SD520: Stores the millisecond portion of a value. (Storage range: 0 to
65535)
• SD521: Stores the microsecond portion of a value. (Storage range: 0 to
999)
When the current fixed cycle processing time is 23.6 ms; for example, it is
stored as shown below:
• SD520 = 23 (ms)
• SD521 = 600 (
μ
s)
S (system)
SD521
Current fixed cycle
processing time
(unit:
μ
s)
SD522
Minimum fixed cycle
processing time
Minimum fixed cycle
processing time
(unit: ms)
The minimum fixed cycle processing time is stored in SD522 and SD523.
(Measured in microseconds.)
• SD522: Stores the millisecond portion of a value. (Storage range: 0 to
65535)
• SD523: Stores the microsecond portion of a value. (Storage range: 0 to
999)
When the minimum fixed cycle processing time is 23.6 ms; for example, it
is stored as shown below:
• SD522 = 23 (ms)
• SD523 = 600 (
μ
s)
S (system)
SD523
Minimum fixed cycle
processing time
(unit:
μ
s)
SD524
Maximum fixed
cycle processing
time
Maximum fixed
cycle processing
time (unit: ms)
The maximum fixed cycle processing time is stored in SD524 and SD525.
(Measured in microseconds.)
• SD524: Stores the millisecond portion of a value. (Storage range: 0 to
65535)
• SD525: Stores the microsecond portion of a value. (Storage range: 0 to
999)
When the maximum fixed cycle processing time is 23.6 ms; for example,
it is stored as shown below.
• SD524 = 23 (ms)
• SD525 = 600 (
μ
s)
S (system)
SD525
Maximum fixed
cycle processing
time (unit:
μ
s)
SD526
Current link refresh
processing time
Current link refresh
processing time
(unit: ms)
The current link refresh processing time is stored in SD526 and SD527.
(Measured in microseconds.)
• SD526: Stores the millisecond portion of a value. (Storage range: 0 to
65535)
• SD527: Stores the microsecond portion of a value. (Storage range: 0 to
999)
When the current link refresh processing time is 23.6 ms; for example, it
is stored as shown below.
• SD526 = 23 (ms)
• SD527 = 600 (
μ
s)
S (system)
SD527
Current link refresh
processing time
(unit:
μ
s)
SD528
Minimum link
refresh processing
time
Minimum link
refresh processing
time (unit: ms)
The minimum link refresh processing time is stored in SD528 and SD529.
(Measured in microseconds.)
• SD528: Stores the millisecond portion of a value. (Storage range: 0 to
65535)
• SD529: Stores the microsecond portion of a value. (Storage range: 0 to
999)
When the minimum link refresh processing time is 23.6 ms; for example, it
is stored as shown below:
• SD528 = 23 (ms)
• SD529 = 600 (
μ
s)
S (system)
SD529
Minimum link
refresh processing
time (unit:
μ
s)
SD530
Maximum link
refresh processing
time
Maximum link
refresh processing
time (unit: ms)
The maximum link refresh processing time is stored in SD530 and
SD531. (Measured in microseconds.)
• SD530: Stores the millisecond portion of a value. (Storage range: 0 to
65535)
• SD531: Stores the microsecond portion of a value. (Storage range: 0 to
999)
When the maximum link refresh processing time is 23.6 ms; for example,
it is stored as shown below:
• SD530 = 23 (ms)
• SD531 = 600 (
μ
s)
S (system)
SD531
Maximum link
refresh processing
time (unit:
μ
s)
Summary of Contents for MELSEC iQ-R C R12CCPU-V
Page 1: ...MELSEC iQ R C Controller Module User s Manual Application R12CCPU V ...
Page 2: ......
Page 23: ...1 EXECUTING PROGRAMS 1 3 I O Access Timing 21 1 MEMO ...
Page 32: ...30 3 MEMORY CONFIGURATION OF C Controller Module 3 4 Files MEMO ...
Page 257: ...I 255 MEMO ...
Page 261: ......