Sony SVT-168 User Manual

RS-485 Commands

GROUP SET (6CH)

Divides into groups (puts group numbers). In response
to this command, the VCR returns the group number
by 2 bytes.
Example: Setting to the group 5

GROUP CHECK (6DH)

Returns the group number.
Example: When the group number is 2

GROUP CLEAR (6EH)

Clears the group number. In response to this
command, the VCR returns the group number by 2
bytes.
Example: When the group number is 8

SET ON (7CH)

Turns on the VCR no matter if it is turned on or off.

SET OFF (7DH)

Turns off the VCR no matter if it is turned on or off.

RS-485 Return Commands

When the RS-485 connector is used and you operate
on the VCR, the VCR automatically returns a status
information of 2 bytes.

First byte: Header (BEH or BFH)
Second byte: Status information

When first byte is BFH
Bit 0, 1, 2, 3, 4: displays what mode the VCR is in.
0,0,0,0,0: no change
1,0,0,0,0: the VCR is turned on without a tape.
0,1,0,0,0: the VCR is turned off without a tape.
1,1,0,0,0: the VCR is turned on with a tape inserted.
0,0,1,0,0: the VCR is turned off with a tape inserted.
1,0,1,0,0: the VCR is in timer recording standby mode.
0,1,1,0,0: the VCR is playing back still picture.
1,1,1,0,0: the VCR is in recording pause mode.
0,0,0,1,0: the VCR is playing back a tape.
1,0,0,1,0: the VCR is recording.
0,1,0,1,0: the VCR is playing back a tape in reverse

direction.

1,1,0,1,0: the VCR is fast-forwarding a tape.
0,0,1,1 0: the VCR is rewinding a tape.
1,1,1,1,0: the VCR is playing back frame by frame.
0,0,0,0,1: the VCR is playing back frame by frame in

reverse direction.

Bit 5, 6: displays when the VCR starts or ends the
alarm recording.
0,0: the VCR is in normal mode.
0,1: the VCR starts the alarm recording.
1,0: the VCR ends the alarm recording.

Bit 7: indicates warning.
1: the VCR has a mechanical problem.
0: normal

TXD
RXD

BE/BF

TXD
RXD