VC820_VC840_VC860 Protocol Rev 1.0 1. RS-232 Serial Interface Setting Direction: One-way to computer Baud rate is 2400 bps No parity 1 start bit 8 data bits (LSB first -Æ MSB end) 1 stop bit Data Decimal: hex Data Length: 14 Bytes 2. LCD Display Figure below is the screen print of the LCD display of the vc820_vc840_vc860 device. Please identify the location of the display that will be described in the following document.
. Message from DMM to PC The general format of the message sent from the DMM to the PC is represented as in the following: Data length : 14 Byte 1byte 2byte 3byte 4byte 5byte 6byte 7byte 8byte 9byte 10byte 11byte 12byte 13byte 14byte Msg [0] Msg [1] Msg [2] Msg[ 3] Msg[ 4] Msg [5] Msg [6] Msg [7] Msg [8] Msg[ 9] Msg [10] Msg [11] Msg [12] Msg [13] Msg[0] Com4 Com3 Com2 Com1 Rs232_flag AUTO_flag DC_flag AC_flag RS232_flag: This flag bit is 1, that RS232 communication op
This flag bit is 1, that the AC Msg[1]_ Msg[2] Display 1: Msg[1] – Msg[2] 0Xmsg[1] 0Xmsg[2] Display1 Msg[3]_ Msg[4] Display 2: Msg[3] – Msg[4] 0Xmsg[3] 0Xmsg[4] Display2 P1_flag: Flag of 1 means that the effective decimal point P1 Msg[5]_ Msg[6] 0Xmsg[5] 0Xmsg[6] Display3 P2_flag: Flag of 1 means that the effective decimal point P2 Msg[7]_ Msg[8] 0Xmsg[7] 0Xmsg[8] Display4 P3_flag: Flag of 1 means that the effective decimal point P3 Msg[9] Com4 Com3 Com2 Com1 Diode_flag k_flag n_flag u_fl
m_flag: This flag bit is 1, said unit is M carry. Example : 1.023mF . Msg[11] Com4 Com3 Com2 Com1 Hold_flag rel_flag ohm_flag F_flag Hold_flag: This bit represents the status of the HOLD function. This bit becomes 1 if the hold function is on. Rel_flag: When REL function is on, this bit becomes 1, and the current transmitted data at DISP2 is the relative value. Manu_flag: Hold_flag: This bit represents the status of the HOLD function. This bit becomes 1 if the hold function is on.