If data other than 30H to 39H are sent, ERROR (02H)
will be returned instead of ACK (0AH).
If a value out of the specified range is sent for any
digit, ERROR (02H) will be returned after ENTER
(40H) is sent.
Example: To search 5:10 on May 10, 2002
CMD
d1
d2
TxD
B5
30
32
RxD
0A
0A
ACK
ACK
d6
d7
d8
30
30
35
0A
0A
ACK
ACK
ENTER (40H)
Indicates the end of numeric data of the T/D
SEARCH 4.
CLEAR ERROR (41H)
• Clears only the last entered numeric data command
while entering the time and date values for T/D
SEARCH 4.
• If an error is generated by an invalid data input for
the T/D SEARCH 4 command, it clears only the
invalid data item to clear the error.
CLEAR (56H)
• Clears the T/D SEARCH 4 command while entering
the time and date values.
• If an error is generated by an invalid data input for
the T/D SEARCH 4 command, it cancels the
command to clear the error.
RS-232C/RS-485 commands
REC REQUEST (FAH)
To be sent preceding a REC (CAH) command.
REC (CAH)
Starts recording when it is sent after REC REQUEST
(FAH).
In one-to-one communication with the specified
device:
Send REC (CAH) when ACK (0AH) is returned after
you send FAH.
CMD
TxD
FA
RxD
0A
ACK
d3
d4
d5
30
35
31
0A
0A
0A
0A
ACK
ACK
ACK
ACK
d9
d10
CMD
31
30
40
0A
0A
0A
0A
ACK
ACK
ACK
ACK
CMD
CA
0A
ACK
In broadcast transmission:
Send REC (CAH) when you confirm that the bus is
opened after you send FAH.
CMD
TxD
FA
RxD
Other Commands
RS-485 command
CLOCK DOWNLOAD (E9H)
(Effective only in broadcast transmission)
Downloads data specified by subcommands s1, s2, and
s3.
If s1, s2, s3 = 30H, 30H, 30H, the date (year/month/
day) will be downloaded.
If s1, s2, s3 = 30H, 30H, 31H, the time will be
downloaded.
CMD
TxD
E9
s1
s2
s3
RxD
s1, s2, s3, dn: ASCII numeric codes 30H to 39H
d1 to dn: Download data
The device that issues E9H will continuously send the
data up to 40H without waiting until the bus opens.
Special Code
ERROR (02H)
• Indicates that the recorder has entered the error status
as an invalid data item was sent while the time and
date values for T/D SEARCH 4 were being entered.
• Indicates that the recorder has received invalid data
for GROUP SET (6CH) or GROUP CLEAR (6DH)
via the RS-485.
CMD
CA
CMD
. . . . . . . . . .
d1
d2
dn
40
85
(GB)