CJ1W-EIP21 Omron, CJ1W-EIP21 Datasheet - Page 312

• Manufacturer Part Number: CJ1W-EIP21
• Description: Ethernet I/P Module
• Manufacturer: Omron

Specifications of CJ1W-EIP21

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

I/O Response Time in Tag Data Links
10-3-3 Effect on the CPU Unit’s Cycle Time
284
Note
The maximum number of tag data link words that can be transferred by one
EtherNet/IP Unit or CJ2H built-in port is 184,832 words. However, if the num-
ber of tag data link words exceeds the number of words that can be
exchanged with the CPU Unit at one time, the data will be divided and trans-
ferred in multiple data exchanges. The following table shows the number of
words that each CPU Unit can exchange at one time.
The number of data exchanges may double as given in the following table
according to the relation with the CPU Unit’s cycle time and the data process-
ing time of the EtherNet/IP Unit or CJ2H built-in port.
The CPU Unit’s cycle time is affected when the EtherNet/IP Unit or CJ2H built-
in port refreshes tag data and status data with the CPU Unit. This effect
depends on the size of the tag data links, and can be approximated with the
values in the following table. When there are multiple EtherNet/IP Units or
CJ2H built-in ports, the effect is cumulative.
CS/CJ Series
SYSMAC CJ2
Series
CPU Unit’s cycle time
data processing time
CPU Unit’s cycle time
data processing time
(1) With CS/CJ-series PLCs, consecutive data area words specified in the
(2) The preceding data processing time approximation is the standard formu-
CPU Unit
tag set will be transferred together if possible. Up to 19 send data blocks
can be processed in one data transmission; up to 20 receive data blocks
can be processed in one data transmission. If there are more blocks, the
data will be divided and transferred in separate data transmissions.
la when a higher priority processing event does not occur in peripheral
servicing. For example, if an instruction such as SEND, RECV, or FAL is
executed, the instruction’s processing will have higher priority, so the data
processing time may be longer.
> EtherNet/IP Unit or CJ2H built-in port
≤ EtherNet/IP Unit or CJ2H built-in port
Output/Send: About 7,405 words max. (If there are more words,
the data will be divided.)
Input/Receive: About 7,405 words max. (If there are more words,
the data will be divided.)
Note The total amount of send data and receive data that can be
Output/send: About 6,432 words max. (If there are more words, the
data will be separated into multiple transmissions.)
Input/receive: About 6,432 words max. (If there are more words,
the data will be separated into multiple transmissions.)
Note The total amount of send data and receive data that can be
Condition
exchanged at one time is about 14,810 words maximum.
transferred at one time is about 12,864 words maximum.
Number of words per data transmission
Number of data transmissions
based on the data size
Number of data transmissions × 2
based on the data size
Number of data transmissions
Section 10-3