Sharp PN-Y556 PN-Y326 PN-Y436 PN-Y496 PN-Y556 Operation Manual - Page 36

Controlling the Monitor with a computer (RS-232C) nResponse code format When a command has been executed correctly O K Return code (0DH, 0AH) A response is returned after a command is executed. * If an ID number has been assigned Space (20H) Return code (0DH, 0AH) O K SPC 0 0 1 ID number of responding monitor When a command has not been executed E R R Return code (0DH, 0AH) * If an ID number has been assigned Space (20H) Return code (0DH, 0AH) E R R SPC 0 0 1 ID number TIPS • "ERR" is returned when there is no relevant command or when the command cannot be used in the current state of the monitor. • If communication has not been established for reasons such as a bad connection between the computer and monitor, nothing is returned (not even ERR). • "ERR" may be returned when a command cannot be received correctly due to interference from the surrounding environment. Please ensure that the system or software retries the command if this occurs. • If no monitor has been assigned the designated ID number (e.g. if the command IDSL0002 is used, but no monitor with ID number: 2 is found), no response is returned. If execution of the command is taking some time WA I T Return code (0DH, 0AH) When the following commands are used, "WAIT" is returned. In this case, a value will be returned if you wait a while. Do not send any command during this period. No ID number is attached to WAIT response. • Commands which return WAIT: 1. When repeater control is used 2. When an IDSL or IDLK command is used 3. When one of the following commands is used: INPS, ASNC, POWR nCommunication interval • After OK or ERR is returned, you must send the following commands. To set a timeout for the command response, specify 10 seconds or longer. When connecting multiple monitors in a daisy chain, set the timeout to at least the product of the monitor's position from the computer multiplied by 10 seconds. Example) 3rd monitor from computer: 30 seconds or longer. • Provide an interval of 100 ms or more between the command response and the transmission of the next command. VOLM0020 OK Interval of 100 ms or more INPS0001 WAIT OK TIPS • When turning the power on while the POWER ON DELAY function is in use, set the timeout period to the POWER ON DELAY period + 10 seconds or longer. Advanced operation This section explains commands for daisy chain connection. The basic communication procedure is the same as in the "One-to-one connection with a computer" section. nID SETTING You can assign a unique ID number to each monitor (see page 29). This allows you to control a particular monitor in a daisy chain of monitors. You can assign ID numbers either from the menu screen or from the computer using RS-232 cable. [Example] ID number: 1 ID number: 2 ID number: 3 ID number: 4 If monitors are connected as shown above, you can execute commands like "Set the volume of the monitor with ID 4 to 20". When designating ID numbers for a set of monitors linked in a daisy chain, you should basically avoid any duplication of ID numbers. ID numbers do not have to be assigned in ascending order starting from the computer. They can also be connected as shown below. [Example] ID number: 3 ID number: 2 ID number: 4 ID number: 1 E 36