Hydac CSI-C-11, Operating Instruction

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7 | Operation HYDAC FILTER SYSTEMS GMBH
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7.1.2 Reading the measured values via Modbus
The connected sensors can be integrated into a network or
higher-level conditioning monitoring
(Condition Monitoring System CMS) or control systems (PLC)
and process control systems via the Ethernet or the RS485
interface with an implemented Modbus
®
protocol.
The measured values are provided via the Ethernet (Modbus
®
TCP) or RS485 (Modbus
®
RTU). The input registers described
below apply to the TCP as well as the RTU version.
Modbus
®
function "Read Input Register" - (Function
code 0x04)
The Modbus
®
"Read Input Register" function is used to read
one or more registers and to send back the data. Two bytes
are sent per register (High Byte first). You can set two different
formats for the registers,
New Format or Old Format. For more
details, see Input Register mapping - New format [
}
49] or
Input Register mapping - Old format [
}
51] .
1
2
3
4
5
6
7
8
9
1
0
A