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2. Set the device address to: 1
3. Set the PLC to wake-up the device by sending any Modbus command.
a. This could be a carriage return, reading the slave id or reading any register.
4. Read the discovery register using Appendix A to trigger the instrument to scan the sensors.
a. The return value can be discarded.
b. Each register is a holding register. Some PLCs require you to add 40000 to the register number or
address. For example: 9301 would be 49301.
c. Alternatively, you can prompt the instrument to discover its sensor mapping by connecting it to
the VuSitu mobile app or Win-Situ software.
5. Select the register to read on the PLC using Appendix B
a. Some PLC devices use the register number directly in programming statements, others use
register
addresses, which are one less than the register number; the programmer must adhere to the PLC’s
programming style
b. Each register is a holding register. Some PLCs require you to add 40000 to the register number or
address. For example: 5451 would be 45451.
6. Set the type of register to: 32-bit float
a. If asked by the PLC this is 2 registers
7. Set the byte order to: Big Endean (MSB)
a. This should be the default and may not be configurable on all PLCs
1. Setup the serial communication the following values:
Programming the PLC
Mode
Start Bit
Baud Rate
Data Bits
Parity
Stop Bit
RTU
1
19200
8
Even
1
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Содержание Aqua TROLL 600
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Страница 33: ...33 ModbusMaster 1 970 498 1500 www in situ com ...
Страница 34: ...34 ModbusMasterwithRS232 ConverterRequired 1 970 498 1500 www in situ com ...
Страница 67: ...67 DeclarationofConformity 1 970 498 1500 www in situ com ...