Sharp PN-L702B PN-L702B Professional LCD Monitor Operation Manual - Page 32

Controlling the Monitor with a PC (RS-232C) You can control this monitor from a PC via RS-232C (COM port) on the PC. You can also connect multiple monitors via a daisy chain by using a PC. By assigning ID numbers to each monitor (see page 33), you can make input mode selection/adjustment or can check the status of a specific monitor. Precautions when the PN-ZB01 (optional) is attached • To control the monitor via RS-232C, set RS-232C/LAN SELECT to RS-232C. • You cannot use RS-232C and LAN control simultaneously. PC connection nOne-to-one connection with a PC Connect with RS-232 straight cable between the PC's COM port (RS-232C connector) and the RS-232C input terminal on the monitor. Communication conditions Set the RS-232C communication settings on the PC 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 PC to the monitor, the monitor operates according to the received command and sends a response message to the PC. Return code RS-232C input terminal PC To COM port RS-232 straight cable (commercially available) nDaisy chain connection... Advanced operation Connect with RS-232 straight cable between the PC'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 RS-232C output terminal RS-232C input terminal PC To COM port RS-232 straight cables (commercially available) C1 C2 C3 C4 P1 P2 P3 P4 Command field Parameter field (4 prescribed (4 character string comprised of: alphanumerical characters) 0-9, +, -, space, ?) 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: AUTR-005 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 36, the current value can be returned by using "?" as the parameter. Example: VOLM ? ? ? ? ← From PC to monitor (How much is current volume setting?). 30 ← From monitor to PC (Current volume setting: 30). * If an ID number (see page 33) has been assigned (For example, ID number = 1). VOLM ? ← From PC to monitor. 30 001 ← From monitor to PC. E 32