Discrete Inputs; A.5 Discrete Inputs - Kipp & Zonen SMP series Instruction Manual

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Explanation of the received bytes:
01 = MODBUS address
04 = read input registers
10 = number of received data bytes
00 01 = operational mode (mode 1)
00 00 = status flags (none)
00 00 = scale factor = 0 = 1x
03 E5 = 997 decimal = sensor 1 data in W/m²
03 E5 = 997 decimal = raw sensor 1 data in W/m²
00 00 = 0 = standard deviation sensor 1
00 F8 = 248 = 24.8 °C.
00 EA = 234 = 23.4 Volt
66 12 = MODBUS checksum (CRC16)

A.5 Discrete inputs

A discrete input can be true or false. A discrete input is read only; a coil can be read or written.
Status indicators
Input Parameter
0 IO_FALSE
1 IO_TRUE
2 IO_VOID_DATA_FLAG
3 IO_OVERFLOW_ERROR
4 IO_UNDEFLOW_ERROR
5 IO_ERROR_FLAG
6 IO_ADC_ERROR
7 IO_DAC_ERROR
8 IO_CALIBRATION_ERROR
9 IO_UPDATE_FAILED
Legend
Input Discrete input
Coil Modbus Coil
Parameter Name
R/W
Read write
Def Default value
Mode
operation mode
Inputs can be read in all modes but some coils can't be written in normal mode or service mode.
R/W Def. Mode Description
R 0 All Always false (for testing only)
R 1 All Always true (for testing only)
R * All Void signal, 1=unstable signal, temperature too low or too high
R * All Overflow, signal out of range
R * All Underflow signal out of range
R * All General hardware error (set if one of the H/W error flags is set)
R * All Hardware error A/D converter
R * All Hardware error D/A converter
R * All Calibration checksum error
R * All Update calibration parameters failed
Modbus® discrete input 0 is the first discrete input
A coil can be read or written.
Name of the register
R
Read only
R/W Read/write
default value at power on (0, 1 or *) * = undefined
N
available in normal mode
S available in service mode
C available in calibration mode (not for users)
F
available in factory mode (not for users)
All available in all modes
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