CJ-series PROFINET I/O Controller Unit Operation Manual for

5 Operation

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 representation 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 configuration.

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 maximum 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:

5

8ms

16ms

Update Rate

32ms

64ms

128ms

256ms

512ms

10

20

35

65

90

126

126

Minimum configuration

10

17

25

45

65

80

105

Typical Configuration

55

55

55

7

13

20

35

Maximum Configuration

CJ-series PROFINET IO Controller Unit Operation Manual for NJ-series CPU Unit (W511)

5-25

5 Operation

Additional Information

• The maximum of 55 devices in maximum configuration is caused by the reaching the limit of

7168 Words that the IO Controller can exchange with the CPU.

• The maximum number of IO Devices that the IO Controller supports is 126.

5-26

CJ-series PROFINET IO Controller Unit Operation Manual for NJ-series CPU Unit (W511)