
B-63404EN/03 OPERATION 1.DeviceNet FUNCTIONS
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1.3.2 Slave Function Data Refresh Rate
The "data refresh rate" is the time required for the control unit (CNC)
to update all I/O signals assigned to the R areas.
NOTE
The data refresh rate does not indicate the I/O
response time on the network. The I/O response
time is dependent on the condition of the network.
Table 1.3.2(a) shows the relationship between the total number of
DI/DO communications points and the data refresh rate in the slave
function.
Table 1.3.2 (a)
Total Number of Slave Communications Points Data Refresh Rate
1 to 64byte 8ms
The relationship changes as follows when master functions are used
together with slave functions.
Table 1.3.2 (b)
Number of DI/DO Communications Points (byte) Data Refresh Rate
1 to 32 8ms
33 to 64 16ms
* A maximum of 32 bytes of DI/DO is updated every 8 msec.
CAUTION
This data refresh rate sometimes changes according
to the configured options taking the overall
performance of the CNC into consideration.