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Chapter 3 Specifications; Performance Specifications; Inter-module Synchronization Accuracy - Mitsubishi Electric MELSEC iQ-R Series Reference Manual

Inter-module synchronization function.
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3
SPECIFICATIONS
Shows the specifications for the inter-module synchronization function.
3.1

Performance Specifications

Shows the performance specifications for the inter-module synchronization function.
Item
Inter-module synchronization cycle

Inter-module synchronization accuracy

Set the inter-module synchronization cycle to satisfy the following condition.
• Inter-module synchronization cycle > inter-module synchronous interrupt program execution time + output
preparation process time of the output module
When using a Safety CPU, set the inter-module synchronization cycle considering the safety cycle process
time since the safety cycle process is prioritized over the inter-module synchronization in the Safety CPU.
• Inter-module synchronization cycle > inter-module synchronous interrupt program execution time + output
preparation process time of the output module + safety cycle process time
Inter-module synchronization accuracy
The accuracy is the difference that each module recognizes the synchronization point and the time of the synchronization
point. In the case of the following output module, the inter-module synchronization accuracy is T
direction, and T0-T
in the negative direction.
min
T
cyc
T
res
Output for when the
inter-module synchronization
OFF
accuracy of the output
module is maximum
(in the negative direction)
Output for when the
inter-module synchronization
accuracy of the output
OFF
module is maximum
(in the positive direction)
The actual external output is output with the following time lag.
Inter-module synchronization accuracy + output module response time (T
• Each module starts the process at the inter-module synchronization functions' start timing, so the input or
output is made after the response time from that inter-module synchronization function's start timing.
• For details on each module's response time (T
3 SPECIFICATIONS
3.1 Performance Specifications
Performance value
• R00CPU, R01CPU, R02CPU: 0.50 to 10.00ms
• Safety CPU: 1.00 to 10.00ms
• CPU modules other than the above: 0.10 to 10.00ms
Calculate the accuracy with the inter-module synchronization accuracy formula. (Page 13 Inter-module
synchronization accuracy calculation formula)
T
T
T
T
min
0
max
T
cyc
ON
• T: Inter-module synchronization accuracy
• T
: Synchronization point time
0
• T
: Time that an output module recognizes synchronization point
min
(Min.)
• T
: Time that an output module recognizes synchronization
max
point (Max.)
• T
: Inter-module synchronization cycle
cyc
• T
: Output module response time
res
T
res
ON
)
res
), refer to each module's manual.
res
-T0 in the positive
max

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