164
SECTION 5
V680 Commands
RFID System
User’s Manual
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
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.
p. 153
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.
Process designation Specifies the process to execute.
“0”: Read history information.
“1”: Clear history information.
Antenna designation Specifies the Antenna with which to communicate.
“1”: Antenna 1
“2”: Antenna 2
Controller history
information
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.
HI
21
2
* CR
1/2
1
Command
code
Terminator
Antenna designation
Process
desig-
nation
×
Command
Response
HI
22
2
* CR
1
0
1
...
Controller history information
n
1/2
Command
code
Terminator
End code
Antenna designation
Resend
flag
×
×
××
×
×
RD 1 70 12 ;
Error command
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.
H1
22
2
*
CR
0
1
0
1
W T 1 7 D
New error log information
12
; R D 7 A ;0 5 1 21
Command
code
Terminator
End code
Resend
flag
Fixed
value
×
×
Response
To Next Page
Loading...
Need help?
General
