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2.14
Access to the AnS/A Series Special Function
Modules
(1) Effect of high-speed access to the special function module
Processing time in the Q series CPU module has been speeded up so that the scan time is shortened.
If the FROM or TO instruction is frequently executed to a special function module in short scan, processing in the
special function module may not be completed
(2) Measures for high-speed access to the special function module
• Adjust execution intervals of the FROM and TO instructions to the processing time and conversion time
using the timer and constant scan of the CPU module.
• Adjust execution intervals of the FROM and TO instructions using SM415 (2n (ms) clock) or SD415 (2nms
clock setting).
If SM415 is used as an interlock for the FROM or TO instruction, the instruction is executed every 120ms
since the initial value of SD415 has been set to "30".
When changing the SM415 clock, store the changed value in SD415.
For details of SM415 and SD415, refer to the following.
QCPU User's Manual (Hardware Design, Maintenance and Inspection)
Note 2.5
Universal
Before using the AnS/A series-compatible special function modules, check the version of the CPU module used.
(
Page 465, Appendix 2)
110
Note 2.5
SM415
FROMP H0
correctly.Note 2.5
K1
DO
K1
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