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5-25
5 Operation
CJ-series PROFINET IO Controller Unit Operation Manual for NJ-series CPU Unit (W511)
5
-4 Perfo
rmanc
e
5
5-
3-6 Suppo
rted Da
ta T
ypes a
nd Conversion
5-4
Performance
As specified, the CJ1W-PNT21 IO Controller can cyclically exchange I/O data with up to 126 PROFI-
NET IO Devices. The rate at which it can service IO Devices depends on the number of connected
devices and the size and complexity of the data. Especially with modular IO Devices, the IO Controller
needs time to pack and unpack the I/O data of each device module and convert them to the correct rep-
resentation in the CPU.
Measurements with various I/O configurations have been done to determine the boundaries of the IO
Controller's performance. At different Update Rates, the greatest number of SmartSlice IO Devices
were determined at which the cycle times can be maintained reliably. These measurements were done
for SmartSlice stations with a minimum I/O configuration, a typical configuration and a maximum config-
uration.
SmartSlice I/O Configurations:
•
Minimum: Each IO Device has 1 x OD4-1, 1 x ID4-1 and an END-M connected. This results in 1
data word output and 2 data words input. The number of modules is 4.
•
Typical: Each IO Device has 4 x ID8-1, 3 x OD8-1, 1 x AD2, 1 x DA2V and 1 x END-M. This
results in 8 data words input and 5 data words output. The number of modules is 13.
•
Maximum: Each IO Device has the maximum number of units connected (64) and has the maxi-
mum amount of I/O data (64 words output and 65 words input). This is reached by connecting 19
x CP1-L, 22 x OD4-1, 22 x ID4-1 and 1 x END-M.
Number of SmartSlice stations that can be serviced at each Update Rate:
Update Rate
Minimum configuration
Typical Configuration
Maximum Configuration
8ms
10
10
7
16ms
20
17
13
32ms
35
25
20
64ms
65
45
35
128ms
90
65
55
256ms
126
80
55
512ms
126
105
55