Omron V680-CA5D01-V2 User Manual page 167

SECTION 5
Communications
READ HISTORY INFORMATION (HI)
The READ HISTORY INFORMATION command is used to read the history information of Tag commu-
nications.
1:1 Protocol
Command
Process
Command
desig-
code
nation
×
H I
2 1
Process designation
Antenna designation
The error log information will not be cleared even if clearing the Controller history information is specified (process des-
ignation 1). Use the READ ERROR INFORMATION (CF) command to clear the error log information.
Response
Command
End code
code
×
H I
2 2
Controller history
information
Example
This example shows the response for when an address error occurred for a READ command and then
a protection error occurred for a WRITE command. Both errors occurred for Antenna 1.
Response
Command
End code
code
×
H 1
2
RFID System
164
User's Manual
Antenna designation
Terminator
*
1/2 CR
1 2
Specifies the process to execute.
"0": Read history information.
"1": Clear history information.
Specifies the Antenna with which to communicate.
"1": Antenna 1
"2": Antenna 2
p. 153
Antenna designation
Resend
flag
Controller history information
× × ...
× ×
1/2 0
1 1 n
Up to 30 records of Controller history information will be returned.
History information is returned in chronological order with the newest records first. Each record is
five characters long.
RD 1 70 12 ;
Fixed Resend
value flag
×
0 0 W T 1 7
2 1 1
Terminator
× *
CR
2
Noise level when error occurred
("00" to "99", "XX" when noise is not detected)
Generated end code
Head No. with error (for communications with Data Carriers only)
A space will be output for when the error is not a communications error.
Error command
New error log information
D 0 5 ; R D 1
12
Terminator
*
7 A 1 2 ; CR
2