Omron SYSMAC NX-CIF101 User Manual

6 - 3
6 Unit Settings
NX-series Communications Interface Units User’s Manual (W540)
6-1 Unit Operation Settings
6
6-1-2 Transmission Buffering
 Timing Chart When Transmission Buffering Is Enabled
 Timing Chart When Transmission Buffering Is Disabled
When transmission buffering is enabled, the CPU Unit or communications master must tell the CIF Unit
when all of the send data is stored in the send buffer. The Output Data Type in the output notification
data that is sent from the CPU Unit or communications master to the CIF Unit is used for this purpose.
The meanings of bits 12 to 15 in the Output Data Type are given in the following table.
If the value of bits 12 to 15 of the Output
Data Type is 2 hex, the CIF Unit knows that all of the send data
is stored in the send buffer. It sends all of the send data together to the serial line.
For details on the Output Data Type, refer to 7-3-3 Input Data Type and Output Data Type on pa
ge 7-10
or A-3 List of NX Objects on page A-
5.
Precautions for Correct Use
Even if transmission buffering is enabled, all of the data in the send buffer is sent to the serial
line if the amount of send data in the send buffer exceeds 4,096 bytes, even if all of the send
data is not yet in the send buffer.
Detecting the Final Data When Transmission Buffering Is Enabled
Bits 12 to 15 in the Output Data Type Description
0 hex There is no send data.
1 hex There is send data that is not the final send data.
2 hex There is send data that is the final send data.
Send data sent from the
CPU Unit or communications
master to the CIF Unit
Send data on the
serial line
Period during which send data is stored
in the send buffer in the CIF Unit
Time is required to start sending the send data to the serial line
after it is sent from the CPU Unit or communications master.
Period during which send
data is sent to serial line
Send data sent from the
CPU Unit or communications
master to the CIF Unit
Send data on the
serial line
Little time is required to start sending the send data to the serial
line after it is sent from the CPU Unit or communications master.
The send data that is sent to the serial
line may be divided into pieces.

Omron SYSMAC NX-CIF101 Specifications

General

Brand	Omron
Model	SYSMAC NX-CIF101
Category	Recording Equipment
Language	English