![background image](http://html1.mh-extra.com/html/omron/v690-series/v690-series_user-manual_741403096.webp)
5-9 Antenna Setting Command
5-40
5-9-6 Read Data Length Setting
Specifies the maximum number of read bytes which can be returned as one response by the Read command. If the conditions of com-
munication with a host device is good, specify a large number. If not, specify a small number.
For example, if you try to read 2048 bytes of data, of which read data length is 256 bytes, by the Read command, the antenna returns a
response 8 times.
<Command Format> * A figure below shows the number of characters.
<Response Format> * A figure below shows the number of characters.
DA
Operation mode
Destination (antenna) station number. "00" to "31". This
can be modified in "5-9-8 Station Number Setting".
Initial value "00"
Setting mode
"99"
SA
Source (host device) station number. "80" to "89". If only one host device is used, specify "80".
Command code
H3
Number of read
bytes
"0020" to "4000": Hexadecimal notation. The unit is byte.
Initial value
"0100" 256 bytes
DA
Destination (host device) station number. * In the command format, the destination is an
antenna.
SA
Source (antenna) station number.
Termination code
Fixed to "00".
Command
code
(BCC)
* It can be specified whether BCC is enabled or disabled.
Number of read
bytes
Command
code
Termination
code
(BCC)
* It can be specified whether BCC is enabled or disabled.