Status Remote Reply (7Eh); Ack Reply (04H); Nak Reply (05H); Status Remote Reply - Sony Trinitron PVM-14M2MDU Interface Manual

1. Elements of reply data, first byte of the data reply
The bits corresponding to the elements of reply
data are set (1).
The values are specified as follows:
2 3
1
Bits which are not specified here are undefined bits
and their values are always ignored.
1 Switch Condition 2
2 RGB Mode
3 Caption Vision
4 Menu
5 Display
2. Reply data
The data of the reply will start at the Display value
(if this data was requested) and finish at the Switch
Condition 2 value.
Each section of the data reply requires the
following details
Display: one byte; the byte value is the same as
that specified under the command Select
Display (2BH)
Menu: one byte; the byte value is the same as that
specified under the command Select Menu
(2CH)
Caption Vision: one byte; the byte value is the
same as that specified under the command
Select Caption (2EH)
RGB Mode: one byte; the byte value is the same
as that specified under the command Select
RGB Mode (2FH)
Switch Condition 2: The values are specified as
follows:
Bits which are not specified here are undefined
bits and their values are always ignored.
1 Tally
2 Overscan
3 Underscan

Status Remote Reply (7EH)

This reply informs the remote controller of the current
remote status of the monitor. The monitor should
always reply to questions independent of the actual
remote state.
4 5
1 2 3
The value being supplied are specified as follows:
1
Bits which are not specified here are undefined bits
and their values are always ignored.
1 Control applied
Remote mode = 01
Local mode = 10
2 Type of remote control ready to apply
This value should always be 10 (serial).

ACK Reply (04H)

This shows that the command to the monitor was
correctly received and executed.

NAK Reply (05H)

Used to specify which type of problem has been found
with the serial communication port by the monitor.
The values are specified as follows:
1 2 3 4
Bits which are not specified here are undefined bits
and their values are always set to 0.
1 Timeout Error: time between bytes should be
less than 10 milliseconds (= 0) otherwise an error
occurs (inter byte time > 10 milliseconds = 1)
2 Framing error on received message
No error = 0
Received message had a framing error = 1
3 Overrun error on received message
No error = 0
Received message had an overrun error = 1
4 Parity error on received message
No error = 0
Received message had a parity error = 1
5 Checksum error on received message
No error = 0
Received message had a checksum error = 1
6 Undefined message
Received message was understood = 0
Received message was not understood = 1
2
5 6
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