Performance List Of Simple Cpu Communication Function - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Performance list of simple CPU communication function

The following shows the performance of the execution interval (simple CPU communication function). The execution interval
varies depending on the number of settings, the number of communication points, and the scan time of the CPU module. The
interval is also affected by the execution conditions of other functions or Ethernet communication condition.
Condition
• Communication setting: "Fixed"
• Sequence scan time (own station) =: 1ms (scan time before the execution of simple CPU communication function)
• Communication destination: MELSEC iQ-R (built-in Ethernet)
• Sequence scan time (communication destination): 1ms (any model)
• Device data: Bit device = M, Word device = D
• The number of settings is as shown in the table (1, 8, 16, 32, and 64) and all settings are for the different communication
destinations (not for the same destination).
• The retry of communication is not performed.
Communication
pattern
Read
Write
*1 Number of points for each device (bit device and word device)
*2 The larger the number of settings for the same communication destination is, the longer the execution interval becomes, and it becomes
up to eight times longer.
APPX
392
Appendix 7 Processing Time
Number of communication points for
one setting
*1
32 words for each device
(Total 64 words)
*1
64 words for each device
(Total 128 words)
*1
256 words for each device
(Total 512 words)
*1
32 words for each device
(Total 64 words)
*1
64 words for each device
(Total 128 words)
*1
256 words for each device
(Total 512 words)
Processing time by the number of settings (unit: ms)
*2
1 8
10 11
10 11
10 13
10 11
10 11
10 13
*2 *2
16 32
17 34
17 35

20
18 35
18 35

20
*2
64
76
77

77
80
