Sharp PN-V701 PN-V701 Operation Manual - Page 38
Controlling the Monitor with a computer (RS-232C), Computer connection, Communication conditions,
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Controlling the Monitor with a computer (RS-232C) You can control this monitor from a computer via RS-232C (COM port) on the computer. You can also connect multiple monitors via a daisy chain by using a computer. By assigning ID numbers to each monitor (see page 39), you can make input mode selection/adjustment or can check the status of a specific monitor. TIPS • To control the monitor via RS-232C, set RS-232C/LAN SELECT to RS-232C. • You cannot use RS-232C and LAN control simultaneously. Computer connection nOne-to-one connection with a computer Connect with RS-232 straight cable between the computer's COM port (RS-232C connector) and the RS-232C input terminal on the monitor. Computer To COM port Communication conditions Set the RS-232C communication settings on the computer to match the monitor's communication settings as follows: Baud rate Data length Parity bit * 8 bits None Stop bit 1 bit Flow control None * Set to the same baud rate as the BAUD RATE setting of SETUP menu. (Initial setting: 38400 bps) * When connecting multiple monitors in a daisy chain, set all monitors to the same BAUD RATE. Communication procedure nCommand format When a command is sent from the computer to the monitor, the monitor operates according to the received command and sends a response message to the computer. Return code C1 C2 C3 C4 P1 P2 P3 P4 RS-232C input terminal RS-232 straight cable (commercially available) Command field Parameter field (4 prescribed (4 character string comprised of: alphanumerical characters) 0-9, +, -, space, ?) nDaisy chain connection... Advanced operation Connect with RS-232 straight cable between the computer's COM port (RS-232C connector) and the RS-232C input terminal on the first monitor. Next, connect RS-232 straight cable to the first monitor's RS‑232C output terminal and to the second monitor's RS-232C input terminal. Connect in the same way to the third and subsequent monitors. Up to 25 monitors can be connected. (Depending on the length of the cable used and the surrounding environment.) First monitor Second monitor Example: VOLM0030 VOLM 30 * Be sure to input 4 characters for the parameter. Pad with spaces (" ") if necessary. (" " is a return code (0DH, 0AH or 0DH)) Wrong : VOLM30 Right : VOLM 30 When inputting a negative value, specify a numerical value in three digits. Example: OFSR-005 RS-232C input terminal RS-232C output terminal To COM port RS-232 straight cables (commercially available) Computer Do not use spaces for MPOS, DATE, and SC01 through SC08. Specify parameters using a specified number of characters. Example: MPOS010097 If a command has "R" listed for "DIRECTION" in the "RS-232C command table" on page 42, the current value can be returned by using "?" as the parameter. Example: VOLM ? ? ? ? ← From computer to monitor (How much is current volume setting?). 30 ← From monitor to computer (Current volume setting: 30). * If an ID number (see page 39) has been assigned (For example, ID number = 1). VOLM ? ← From computer to monitor. 30 001 ← From monitor to computer. E 38