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4. Protocol of RS-232C Serial Interface (RM-1501)
Ten bytes are sent out through RS-232C connector to PC. The definitions of
each byte are as followings:
Byte 1: Leading byte 0x0D
Byte 2: Decimal point of LCD display
bit0: dp1 (0000.0), if 1
bit1: dp2 (000.00), if 1
bit2: dp3 (00.000), if 1
Byte 3: Flags for current status
bit0: low battery, if 1
bit1: Max. value overflow, if 1
bit2: Counter overflow, if 1
bit3: Auto-power-off disable, if 1
bit4: Min. value overflow, if 1
bit5: Ave. value overflow, if 1
Byte 4: Unit
bit0: rpm, if 1
bit1: m/min, if 1
bit2: ft/min, if 1
bit3: yd/min, if 1
bit4: rps, if 1
bit5: counter with external light source, if 1
bit6: counter without external light source, if 1
Byte 5: Function
bit0: normal, if 1
bit1: max, if 1
bit2: min, if 1
bit3: average, if 1
Byte 6: Flags for current status
bit4: LCD reading over load (OL)
bit7: Hold
Byte 7: Least significant byte of reading in binary format
Byte 8: 2nd byte of reading in binary format
Byte 9: 3rd byte of reading in binary format
Byte 10: Most significant byte of reading in binary format