Siemens S7-200
PLC 485 communication format:
Free mouth mode (01), baud rate 9600 (010), data bits 8 bits (0), even check (00).
Instrument communication format is as follows:
The instrument communication format is: 9600, stop bit: 2, data bit: 8, odd check,
The instrument parameter setting should be set in continuous mode! (F16 = 1)
PLC 485 communication pin definition:
3 feet by RXD
Eight feet by TXD
Program sample:
The main program calls SBR_0 to initialize the communication port.

Main technical parameters
2.1 A/D sampling rate: 7.5 times/second to 960 times/second.
2.2 internal resolution: 24 bits.
2.3 nonlinearity: less than 0.01%F.S.
Zero temperature drift 2.4:0.1 u V / ℃ or less
2.5 range temperature coefficient: no more than 5ppm/ m2.
2.6 full range net input signal range: 2~15mV.
2.7 starting weight signal range: -1~+9mV.
2.8 analog input signal sensitivity: 0.2uV /d (minimum)
1.5uV/d (recommended)
2.9 zero range: + or - 4%FS, plus or minus 10%FS, plus or minus 20%FS, plus or minus 50%FS optional.
2.10 peeling range: 0 ~ +100%FS.
Working environment temperature: 2.11-10 ℃ to 40 ℃
2.12 relative humidity: 90% (no condensation)
2.13 power supply: DC7.5~40V(0.5~2A)
2.14 upper and lower limit optical coupling drives the output relay line package.
2.15 sensor for the bridge voltage: DC 5 v can meet not less than 800 Ω 12 impedance sensor
2.16 dc insulation resistance: > 5 M W.
2.17 withstand voltage: exchange 1500V for one minute without breakdown.
2.18 working frequency ac leakage current: < 3.5 mA.
2.19 appearance size: 156 mm ´ ´ 101 mm to 50 mm
Weight: 0.5kg.
2.21 power consumption: ~200mA (excluding sensor)
3. Display keyboard and size.

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