PC Operation (Continued)

Communication procedure

Basic operation

<Command format>

When a command is sent from the PC to the monitor, the monitor operates according to the received command, and sends a response message to the PC.

Carriage return code

C1

 

C2

C3

 

C4

P1

 

P2

P3

P4

 

 

 

 

 

 

 

 

 

Command field

Parameter field

 

(4 prescribed

 

(4 character string

alphanumerical

 

comprised of:

 

characters)

 

0-9, +, -, space, ?)

Example: VOLM0030

POWR1 (“” indicates a space.)

*Be sure to input 4 characters for the parameter. Pad with spaces if necessary. ✕ VOLM30

●VOLM30 (“” indicates a space. “” is the carriage return code (0DH, 0AH or 0DH).)

If a command has “R” listed for “DIRECTION” in the “RS-232C Command table” on page 52, the current value can be returned by using “?” as the parameter.

Example: 1. If an ID number has not been set:

VOLM???? ← From PC to monitor (Current volume setting: ?)

30← From monitor to PC (Current volume setting: 30)

2.If an ID number has been assigned (For example, ID number = 001)

VOLM? ← From PC to monitor (“” indicates a space.)

30001 ← From monitor to PC (“” indicates a space.)

<Response code format>

■When a command has been executed correctly

Carriage return code

This is returned when execution of the command

O K

(0DH, 0AH)

is finished.

■When a command has not been executed correctly*

 

 

 

 

 

 

 

Carriage return code

 

 

 

 

 

 

 

(0DH, 0AH)

E

R

R

 

 

 

 

 

 

 

 

 

■If execution of the command is taking some time

*This is returned when there is no such com- mand, or when the command cannot be used in the current state of the monitor (i.e. video auto- adjustment with video display).

*If there is a bad connection between the PC and monitor, or if communication has not been established, nothing is returned (not even ERR).

 

 

 

 

 

 

 

 

Carriage return code

 

 

 

 

 

 

 

 

(0DH, 0AH)

W

A

I

T

 

 

 

 

 

 

 

 

 

■If RS-232C is locked

If a command takes some time to execute, WAIT may be returned as the return value. Wait for a moment, and OK or ERR will be returned. New commands cannot be received during this time, even if they are sent.

Carriage return code (0DH, 0AH)

If RS-232C control has been locked with the

 

 

 

 

 

 

 

 

 

operation lock (see page 29), LOCKED is re-

L

O

C

K

E

D

 

 

 

 

 

 

 

 

 

turned as the returned value.

 

 

 

 

 

 

 

 

 

 

 

 

E40